Hui-qun Liu

• PhD
• Central South University

In this work, an anomalous compression behavior at 300 °C was found in a Fe–Cr–Al alloy, where the stress value decreased with increasing the strain rate, presenting a counterintuitive strain rate sensitivity effect. The results indicate that variations in kinking activation are the primary contributors to this phenomenon. Kinking can reduce signif...

This work aims to compare the microstructure and recrystallization of wrought FeCrAl alloy and oxide dispersion‐strengthened nanostructured ferrite alloy (ODS‐NFA) in industrial pilgered tubes. The second‐phase particles significantly affect the microstructure and recrystallization. The micron‐sized Laves precipitates in FeCrAl alloy lead to comple...

Titanium alloys are widely used in the petrochemical industry owing to their excellent overall performance. In this study, a high-temperature solution treatment in the two-phase region was proposed, with a slow cooling rate resulting in the successful partial globularization of lamellar α microstructure, achieving an extruded Ti-Al-V-Mo-Zr alloy tu...

The microstructure of FeCrAl cladding tubes depends on the fabricating process history. In this study, the microstructural characteristics of wrought FeCrAl alloys during industrial pilger processing into thin-walled tubes were investigated. The hot extruded tube showed ∼100 μm equiaxed grains with weak α∗-fiber in {h11} texture, while pilger rolli...

The precipitation behavior of second phases and mechanical property of Fe–13.5Cr–4.7Al–2.1Mo–0.5Nb–0.8Ta–0.2Zr (wt.%) alloy was investigated in the present study. Alloy ingots were fabricated by vacuum arc melting and multi-pass hot rolling, then solid-solutionized at 1473 K for 2 h and aged at 1073 K for 0–24 h. In the initial aging process, the p...

FeCrAl/N18 clad plates were fabricated by solid-state diffusion. The clad plates were hot rolled, and then annealed under vacuum at 800 °C for 480 h. The microstructures and shear tensile strengths of the obtained FeCrAl/N18 clad plates were subsequently investigated. It was found that after annealing, the three samples at the interface were compos...

Coated fuel particles have been developed into isotropic tristructure (TRISO) for the high-temperature gas reactors. The Zy4/TRISO composite belongs to a Zy4 matrix with distributed coated surrogated nuclear fuel particles (ZrO2 kernel). In this study, the thermal deformation behavior of a Zy4/TRISO composite was investigated at temperatures of 750...

This study investigates the coarse Laves phase stimulated nucleation of recrystallization behavior in iron–chromium–aluminum (Fe–Cr–Al) alloys. The results reveal that the samples with coarse Laves phases in the matrix have finer grains because of the occurrence of particle stimulated nucleation (PSN). Due to the lower diffusion coefficient and low...

Recrystallization annealing of warm-pilgered FeCrAl tubes was the key to reduce the cracking and control the microstructure and properties of the cladding tube. The recrystallization and texture evolution of warm-pilgered FeCrAl tubes were investigated. The recrystallization kinetics and textural evolution during annealing were characterized using...

The present work investigated the hot (800–1100 °C) and warm (600 °C) deformation behavior of Fe–13.5%Cr–4.7%Al–2.0%Mo–1.0%Nb (wt.%) (FeCrAl), Fe–13.5%Cr–4.7%Al–2.0%Mo–0.9%Nb–0.11%Zr (wt.%) (FeCrAl–Zr) and Fe–13.5%Cr–4.7%Al–1.4%Mo–1.0%Nb–1.32 W (wt.%) (FeCrAl–W) ferritic stainless steels using a thermal simulation machine at strain rates of 0.01–10...

Warm compression deformation of Fe–13.5%Cr–4.7%Al–2.0%Mo–0.70%Nb–0.40Ta (wt%) (FeCrAl) and Fe–13.5%Cr–4.7%Al–2.0%Mo–0.45%Nb–0.40Ta–0.11Zr (wt%) (FeCrAl–Zr) ferritic stainless steel was performed by a thermal simulation machine Gleeble 3800 at 600 °C and strain rates of 0.01–10 s−1. Before deformation, all the samples were solution-annealed for 2 h...

The effect of a small amount of Zr addition on the temperature-dependent stability of Laves phase particles and mechanical properties of Fe-13.5Cr-4.73Al-2.07Mo-(0.34–0.5)Nb-(0.65–0.98)Ta-(0–0.33)Zr (wt. %) ferritic alloys was investigated in the present study. The designed alloy ingots were hot-rolled, aged at 1073 K for 24 h, and then re-treated...

Iron–chromium–aluminum (Fe–Cr–Al) alloys have great potential application as an accident-tolerant fuel cladding material in light-water reactors. It has excellent processing ability, resistance to steam oxidation at high temperatures (HTs), and irradiation swelling-resistance. It is necessary to improve the room- and high-temperature mechanical pro...

The plastic deformation processes and fracture behavior of a Ti–5Al–5Mo–5V–1Cr–1Fe alloy with bimodal and lamellar microstructures were studied by room-temperature tensile tests with in situ scanning electron microscopy (SEM) observations. The results indicate that a bimodal microstructure has a lower strength but higher ductility than a lamellar m...

The weld reinforcement has a strong impact on mechanical properties of MIG welded joints. This paper investigates the effect of weld reinforcement on tensile, high cycle fatigue and fatigue crack propagation properties of 5083 MIG welded joint through experimentation and numerical simulations. The results show that the existence of reinforcement si...

The limited ductility and impact toughness of titanium alloys is a critical issue that limits the use of titanium alloys in the oil and gas industry. In this study, we obtained the highest impact toughness (55.7 J/cm²) for an extruded Ti–Al–V–Mo–Zr alloy tube using a three-step heat treatment. The microstructure and corresponding mechanical propert...

Electron backscatter diffraction (EBSD) and backscattered electron imaging (BSE) were used to study the origin of microtextured region and how thermo-mechanical processing affects the macro/microtexture in near-β titanium alloys. Multi-step heat treatments were conducted on an (α+β)-warm-compressed Ti-55511 bar. It includes two-step sub β-transus a...

This study investigated the microstructure and mechanical properties of interrupted aged cast Al–4.5Cu–3.5Zn–0.5 Mg alloy. Small Cu-rich Guinier–Preston (GP) zones and Mg-rich clusters (GPI zones) formed during the initial aging stages. Zn addition promoted the formation of a uniformly dispersed fine plate-like Ω phases in the matrix. The microstru...

High temperature deformation of Fe–13.5Cr–4.7Al–2.0Mo–0.70Nb–0.40Ta (FeCrAl) and Fe–13.5Cr–4.7Al–2.0Mo–0.45Nb–0.4Ta–0.11Zr (FeCrAl–Zr) alloys was performed at temperatures of 800–1100 °C with the strain rates of 0.01–10 s⁻¹, and the constitutive model was established based on the Arrhenius equation. True strain-stress curves showed dynamic softenin...

The stress relaxation (SRT) behaviour and α phase evolution of Ti-55511 alloy with bimodal and lamellar microstructures were investigated at 350, 400, 450 and 500°C. The results indicated that, the stress decreased with SRT time and the decreasing rate increased with temperature at the initial stage for both bimodal and lamellar samples. While, the...

The stress corrosion cracking (SCC) behavior of Ti-6Al-4 V alloy with different lamellar α microstructures in simulated oilfield brine was investigated in this study. The SCC susceptibility of the Widmanstätten sample was 11.0%, lower than that of the bimodal and trimodal samples (19.9%, and 18.0%, respectively). In the Widmanstätten sample, the cr...

The emergence of gradient structures has realized the possibility of improving the strength and plasticity of metals simultaneously. This study analyses the effects of introducing ultrasonic and liquid nitrogen during conventional stirring and friction treatment. The results show that the mechanical properties and damage tolerance of 5083 aluminum...

FeCrAl/Zy4 clad plates were fabricated by solid diffusion at 850 °C for 5 h under mechanical pressure in argon atmosphere, and hot rolling at 800 °C with a reduction of 22%, 30%, and 52%. The hot-rolled clad plates were annealed at 700 °C for 0.5–3 h and were well-bonded. The αZrCr2, ZrFe2 and Zr3Al phases formed at the interface of the annealed sa...

Numerous reports have elucidated the importance of impact toughness measurements for investigating the damage tolerance of a material. However, the effect of heat treatment parameters on impact toughness and the crack propagation mechanism in titanium alloys has rarely been addressed. Herein, the impact toughness of extruded Ti−Al−V−Mo−Zr alloy tha...

The clad plate between ZrSnNb and FeCrAl alloy was fabricated through diffusion bonding at 850 °C for 5 h under mechanical pressure in an argon atmosphere, and subsequent hot rolling at 800 °C with 20, 37 and 50% rolling reduction. The annealing treatment on hot-rolled plate was carried out in vacuum at 800 °C for 480 h. Interface observation and p...

Here, we revealed the effect of different precipitates on the corrosion behavior of an Al-Cu-Li alloy through quasi-in-situ transmission electron microscopy observation. The corrosion mode changed from inter-granular to intra-granular as the aging time at 160 °C increased. The decreased susceptibility to inter-granular corrosion was due to the prec...

The FeCrAl/Zy4 bi-layer clad plate was fabricated by solid diffusion, hot rolled and annealing treatment. The interface microstructure and phase analysis, texture, shear and tensile strength of the clad plate were investigated in details. The diffusional interface of clad plate was tightly bonded, and there were no cracks and pores. The intermediat...

The corrosion behaviors of CP Ti, Ti-Ru, Ti-6Al-4V-Ru (Ti-64-Ru) and Ti-5Al-5Mo-5V-1Cr-1Fe-Ru (Ti-55511-Ru) in HCl solution were investigated using open circuit potential, polarization curves, mass loss measurement and X-ray photoelectron spectroscopy. The corrosion current density of Ti-64-Ru was 5 times higher than that of Ti-55511-Ru. While the...

Composites of graphene nanoplatelets (GNPs) and 8030 aluminum alloy powder were prepared using powder modification + semisolid extrusion processes. The density, electrical conductivity, mechanical properties and microstructure of the specimens were investigated. The results show that the composites with 0.5 wt% GNPs achieved an enhancement in yield...

This study experimentally investigated the electrochemical corrosion and pitting corrosion of Ti–6Al–4 V alloy samples with different roughness in 12 wt.% HCl solution at 35 °C. The corrosion behavior of these alloy samples was studied by potentiostatic and potentiodynamic polarization. Both the corrosion rate and pitting sensitivity of the sample...

Effect of Ag addition on the age hardening and precipitation behavior of an Al-Cu-Li-Mg-Zn-Mn-Zr alloy has been investigated by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) with an energy dispersive X ray spectro...

Al–Cu, being a high-strength aluminium alloy, is used to prepared castings which are widely used in the automotive and aerospace industries as lightweight parts. However, corrosion is an issue. The Al–Cu alloys show improved properties when other elements are added to them. One such alloy is Al–4.5Cu–3.5Zn–0.5Mg. In order to improve the corrosion r...

The fatigue tolerance of 5083 aluminum (Al) alloy has attracted considerable research interest owing to its wide application in railway vehicle and shipbuilding industries. Thus, the fatigue crack propagation (FCP) behavior of this alloy is studied under various stress ratio (R) conditions. The results show that the higher R, the higher is FCP rate...

In the present work, the sheets of Zr–1Sn–0.3Nb–0.3Fe–0.1Cr alloy were hot rolled with different reductions (10%, 30%, 50%, and 60%) at 1023 K and 1073 K. The microstructure evolutions including grain microstructure, texture, and dislocation were investigated, using electron backscattering diffraction and transmission electron microscope. The resul...

The properties and microstructure evolution of Ti-5Al-5Mo-5V-1Cr-1Fe alloy with bimodal microstructure during uniaxial fatigue were investigated. The results showed that, the elastic modulus, ultimate strength and elongation decreased by 14.8%, 15.7%, and 92% respectively at the late stage of fatigue, under conditions of frequency f = 10 Hz and str...

We herein report our investigation into the influence of cold-rolling on the recrystallization texture of the Zr-1Sn-0.3Nb-0.3Fe-0.1Cr alloy during annealing. The as-received plates were cold-rolled at 25 °C with different reductions of 6, 10, 14, 18, 30, 40, 50 and 70%. All cold-rolled sheets were annealed at 580 °C for 3 h, while 14 and 30% cold-...

Microstructure characteristics and restoration mechanism were studied in a near-β Ti-5Al-5Mo-5V-1Cr-1Fe alloy after the single- and multi-pass compression at 800 °C (below the β-transus) and 950 °C (above the β-transus) with the strain rate of 5s ⁻¹ , 30s ⁻¹ and 50s ⁻¹ . The results showed that the restoration mechanism of the alloy in β phase duri...

α Macrozones are usually observed in near-α/α+β titanium alloys but have not been reported in near-β titanium alloys. This article shows that a new type of α macrozone has been observed using electron backscatter diffraction (EBSD)-orientation maps in a near-β titanium alloy Ti-5Al-5Mo-5V-1Cr-1Fe after thermo-mechanical processing. The microstructu...

Microstructure plays a crucial role on mechanical properties of materials. The as-prepared Al-Cu-Li alloy exhibits excellent thermal stability during longer aging treatment at 160 °C. Transmission electron microscopy, high angle annular dark field scanning transmission electron microscopy and first-principle energy calculations were used to evaluat...

Industrial application of superhydrophobic surfaces is often hindered by complicated process and sophisticated machines. A facile wet etching method (sandblast, HCl and sandblast/HCl) with vapor deposition of PFDS (1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane) was applied to fabricate superhydrophobic surface of heat-resistant steel used for vane....

High-temperature plane-strain compression of a Ti-6Al-2Sn-4Zr-2Mo (Ti-6242) alloy with a lamellar structure was applied by a thermal simulation machine Gleeble 3800 at a temperature of 1223-1370 K and a strain rate of 0.01-10 s⁻¹. Constitutive relations between the flow stress and strain at different temperatures and strain rates were constructed b...

The effect of electrostatic potential (EP), specifically without current and Joule heating effect, on the precipitation in aluminum alloy during artificial aging (180 °C) was investigated via microhardness testing, transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS), and measurements of vacancy formation enthalpy and va...

An intricate understanding of the fundamental β→α phase transformation upon the presence of metastable ω phase is vital for tailoring the multiphase microstructures of titanium and titanium alloys for various specific applications. To approach this, the structures and energetics of heterophase interfaces among α β and ω in titanium were thoroughly...

High-temperature compression deformation of a Zr-4 metal matrix with dispersed coated surrogate nuclear fuel particles was investigated at 750 °C–950 °C with a strain rate of 0.01–1.0 s⁻¹ and height reduction of 20%. Scanning electron microscopy was utilized to investigate the influence of the deformation conditions on the microstructure of the com...

The effects of cold-rolling reduction, annealing temperature, and time on recrystallization behavior and kinetics of cold-rolled Zr-1Sn-0.3Nb-0.3Fe-0.1Cr alloy were investigated using the Vickers hardness test, scanning electronic microscopy (SEM), transmission electron microscopy (TEM) and electron backscatter diffractometry (EBSD). The results sh...

The phase composition, microstructure and the changes of mechanical properties of biomedical Ti-25Nb-10Ta-1Zr-0.2Fe alloy (TNTZF) during rolling deformation with reductions of 40%-80% at -20℃ were investigated by means of XRD, TEM, microhardness measurement and tensile test. The results show that stress-induced α″ martensitic transformation of the...

The effects of electric field on the evolution of excess quenched-in vacancy as well as solute clustering in Al-4wt%Cu alloy, and on the vacancy migration and formation enthalpy of pure aluminum were investigated, using positron annihilation lifetime spectroscopy, high-angle annular dark-field scanning transmission electron microscopy, transmission...

Fatigue crack growth as a function of a phase volume fraction in Ti-6Al-2Sn-4Zr-2Mo (Ti-6242) alloy was investigated using fatigue testing, optical microscopy, scanning electron microscopy, and transmission electron microscopy. The α+β annealing treatments with different solid solution temperatures and cooling rates were conducted in order to tailo...

Microstructure evolution of three Al-Ag alloys with different Ag contents (1 wt. % Ag, 5 wt. % Ag, and 15 wt. % Ag) was studied by positron annihilation spectroscopy during the aging process. In situ measurements of the positron lifetime and Doppler broadening of annihilation radiation indicate the fast formation of Ag-rich clusters during natural...

The grain growth retardation mechanism and the effect of cooling rate on VC-doped WC–Co cemented carbides were investigated in this work. WC–30Co and WC–30Co–VC were prepared by powder metallurgy, liquid-phase sintering at 1400 °C and followed by water quenching (>150 °C/s) or furnace cooling (~0.083 °C/s). Based on the results of electron probe mi...

The effect of varying the Cu content of Al-Mg-Si-xCu (x = 0.5, 1.0, 2.5 and 4.5, in wt.%) alloys on precipitation and their age-hardening behavior was investigated through hardness measurements, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and high-angle annular dark field-scanning transmission el...

The effects duplex aging on the microstructure and mechanical properties of Ti-25Nb-10Ta-1Zr-0.2Fe titanium alloy were studied by XRD, TEM, microhardness and tensile test analysis methods. The results indicate that the hardness curve of duplex aging is on the tops of the curve of single aging, and shows the double-peak feature. Ladder-shaped α comp...

Decreasing the anisotropy of 2524 alloys is a key factor for their use in applications such as high-performance inertial components or space robots. Studying the interaction between sheet textures and anisotropy is a key factor to overcome this problem. In this study, the semi-quantitative approach to estimate the relation between texture and in-pl...

2524-T3 aluminum alloy sheets with different grain sizes (13 μm, 59 μm, 178 μm, 355 μm, 126 μm, and 87 μm) were prepared using methods such as rolling and annealing. The microstructures and mechanical properties of the 2524-T3 aluminum alloy sheets were studied using optical microscopy (OM), scanning electron microscopy (SEM), and tensile and fatig...

The effects of secondary particle-induced local recrystallization on fatigue crack growth in electromagnetically cast AA2524/AlCuMg T3 alloy sheets were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and fatigue tests. A neck-lace-like structural model, which was composed of coarse secondary par...

Orthorhombic α″ phase often forms in Ti alloys through martensite transformation during quenching. Here, we report the formation of orthorhombic α″ phase in a low modulus β-Ti alloy during isothermal ageing. The coexists with α and ω phases, and remains stable for 120 h during ageing at 673 K. The phase is highly coherent with the β matrix, sharing...

In this study, industrial 2524 aluminium alloy plates with various grain sizes (0.8–298 μm) were prepared by cold rolling and heat treatment. The fatigue-crack-growth rate was studied as a function of grain size through fatigue tests and microstructural observations. The results showed that grain refinement led to a decrease in the resistance again...

Al–0.42Mg–0.5Si–1.0Cu alloy was prepared by hot extrusion, followed by quenching and ageing treatment. The keeping and pre-straining immediately after quenching were performed before ageing, to investigate natural ageing and pre-straining effects on the age-hardening and microstructural response of the alloy, hardness measurement, TEM, and HRTEM ch...

The oxidation mechanism of WC-Co cemented carbides during early oxidation stage was investigated by electron probe X-ray micro-analyser (EPMA), grazing incidence X-ray diffraction (GIXRD) and X-ray photoelectron spectroscopy (XPS). Temperature-time diagram of oxidation of WC-Co cemented carbides, obtained by EPMA results, can be divided into three...

Three Al–Zn–Mg–Cu alloys used for oil drill pipes (Alloy A: Al–6.9Zn–2.3Mg–1.7Cu–0.3Mn–0.17Cr; Alloy B: Al–8.0Zn–2.3Mg–2.6Cu–0.2Zr, Alloy C: Al–8.0Zn–2.3Mg–1.8Cu–0.18Zr) were studied by hardness tests, tensile tests and transmission electron microscopy (TEM). The results show that the ultimate tensile strength, yield strength and elongation for All...

The influence of microstructure on creep behavior of Ti-5Al-5Mo-5V-1Fe-1Cr (TC18) alloy at 350-500. °C and tensile stress of 200-400. MPa was investigated by creep testing and transmission electron microscope (TEM). The creep mechanism was discussed by microstructure evolution. The results showed that, the alloy with lamellar structure showed bette...

The effects of solution treatment on the microstructures and mechanical properties of new high-strength heat-resistant Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd aluminum alloy were studied by OM, SEM, DSC and room temperature tensile test. The results show that, as the solution temperature increases from 510 ℃ to 525 ℃, the primary phases dissolve in matrix. The...

The corrosion resistance of Ti-25Nb-10Ta-1Zr-0.2Fe (mass fraction, %) (TNTZF) alloy in Ringer's solution at 37 °C was investigated by potentiodynamic polarization measurement. Ti-6Al-4V ELI (Extra low interstitial) alloy was also investigated to make a comparison. The results show that TNTZF alloy has higher corrosion potential, lower corrosion cur...

The friction and wear properties of WC-11Co cemented carbides against two kinds of granites were evaluated on the MMU-10 pin-on-disk multifunctional friction and wear tester under wet sliding condition, and the morphological analyses of the worn surface were studied by scanning electron microscope. The results show that, under the same friction con...

A biomedical β titanium alloy (Ti-19 Nb-1.5Mo-4Zr-8Sn) was designed and prepared by vacuum arc self-consumable melting. The ingot was forged and rolled to plates, followed by quenching and ageing. Microstructure evolution and its influence on mechanical properties of the alloy were investigated, using X-Ray diffraction, scanning electron microscopy...

T300 carbon fiber was oxidized in H2SO4/HNO3 liquid at 60℃ under ultrasound environment. The oxidized T300 fiber was used to prepare the carbon fiber reinforced epoxy resin composite. The morphology, surface chemistry qualities of carbon fiber and mechanical properties of the composite were characterized by means of X-ray photoelectron spectroscopy...

The exposure of Al–5Cu alloy to an external stress with normal aging was carried out. The effects of external stress-aging on the morphology and precipitation behavior of θ″ phase were investigated by transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and first principle calculation. The size of the θ″ phase precipitate...

chun, High temperature deformation and creep behavior of Ti-5Al-5Mo-5 V-1Fe-1Cr alloy, Materials Science & Engineering A, http://dx.doi.org/10.1016/j.msea.2014.06.116 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscrip...

Adiabatic shear band (ASB) is an important materials phenomenon often observed in metals when processed at high strain rates. The microstructure and microtexture in ASBs in Ti-6Al-4V alloy with lamellar microstructure deformed by the dynamic loads was investigated by means of Light Microscope (LM), Scanning Electron Microscopy/Electron Back-Scatter...

Ni-coated titanium carbide (TiC) composite powders were prepared by electroless plating (EP). Further, using hot isostatic pressing (HIP), iron matrix composites reinforced with 4 wt% Ni-coated TiC particulates with relative density close to 100% were prepared. The microstructure and phase composition of the Ni-coated powders and the composites wer...

Nb-Cr, Nb-Cr-Al and Al/Nb-Cr coatings were deposited by DC reactive magnetron sputtering and the microstructures and initial oxidation resistance of the three coatings were studied. The results show that the as-deposited Nb-Cr coating is composed of Cr2Nb phase and exhibits columnar structure. The Nb-Cr-Al coating is columnar with amorphous phases....

The oxidation of WC–Co cemented carbides cutting tools is a key factor in determining tools' life during dry and high speed cutting. Thus, its investigation is of great importance to the design and development of cutting tool materials. In this paper, the non-isothermal oxidation of WC–6Co cemented carbides was carried out on simultaneous thermogra...

AA8030 aluminum alloy (Al-0.7Fe-0.2Cu) rod was prepared by hot extrusion, and the influences of extrusion ratio on microstructure and electrical properties of alloy were investigated by OM, SEM, TEM and conductivity determination. The results show that the dynamic recrystallization occurs during hot extrusion, moreover, the meshy Al6Fe phase is tra...

Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy were used to study the microstructure evolution of Al–Cu–Mg alloy during the initial stage of homogenization. It was found that two types of precipitation-free zones (PFZs) can form concurrently: one near grain boundaries and the other at the grain centres. Depth profil...

The cycled oxidation resistance abilities of single NiCrAlY coated sample and NiCrAlY/CrON duplex coating sample were studied by cooling from 1 050°C to room temperature in air and water quenching. The results show that during slow cooling, the single NiCrAlY coating degrades after 200 cycles, with mixed-oxides of Al2O3, NiCr2O4 and TiO2 on the sur...

The Ni-coated TiC composite powder was prepared by electroless plating using hydrazine as the reductant, and the process parameters were optimized. The surface morphology, nucleation growth mechanism and phase component of the optimized TiC powders coated by pure nickel were studied using DSC, XRD, SEM and EDS. The results show that a better and fa...

Objective: To evaluate the cytotoxicity of a new type of titanium alloy Ti-25Nb-10Ta-1Zr-0.2Fe by studying the induced proliferation of L929 cells in contrast with other titania widely used in clinical practice. Methods: The cell line was treated with extracting liquid containing different concentrations of titanium alloys. The number and morpho...

The effect of Zr and Ce on microstructure and compressive properties at room temperature of as-cast Ti-11 at% Si hypoeutectic alloy was investigated by means of optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and compressive test. The results show that with proper addition o...

The effects of cold deformation on the microstructure, texture evolution and mechanical properties of Ti–25Nb–10Ta–1Zr–0.2Fe (TNTZF) alloy during cold rolling (CR) were investigated. The results showed that the dominant deformation mechanisms changed from stress-induced α″ martensitic transformation and dislocation tangles to twinning, shear bands...