Materials and Manufacturing Processes (MATER MANUF PROCESS )

Publisher: Taylor & Francis

Description

Materials and Manufacturing Processes deals with issues that result in better utilization of raw materials and energy, integration of design and manufacturing activities requiring the invention of suitable new manufacturing processes and techniques, unmanned production dependent on efficient and reliable control of various processes including intelligent processing, introduction of new materials in industrial production necessitating new manufacturing process technology, and more. Information is offered in various formats, including research articles, letter reports, review articles, conference papers, applied research, book and conference reviews, patent reports, and entire issues devoted to symposia.

  • Impact factor
    1.30
    Show impact factor history
     
    Impact factor
  • 5-year impact
    1.39
  • Cited half-life
    4.00
  • Immediacy index
    0.17
  • Eigenfactor
    0.00
  • Article influence
    0.24
  • Website
    Materials and Manufacturing Processes website
  • Other titles
    Materials and manufacturing processes (Online)
  • ISSN
    1042-6914
  • OCLC
    45552471
  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Taylor & Francis

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    • Author can archive a pre-print version
  • Post-print
    • Author cannot archive a post-print version
  • Restrictions
    • 12 month embargo for STM, Behavioural Science and Public Health Journals
    • 18 month embargo for SSH journals
  • Conditions
    • Some individual journals may have policies prohibiting pre-print archiving
    • Pre-print on authors own website, Institutional or Subject Repository
    • Post-print on authors own website, Institutional or Subject Repository
    • Publisher's version/PDF cannot be used
    • On a non-profit server
    • Published source must be acknowledged
    • Must link to publisher version
    • Set statements to accompany deposits (see policy)
    • Publisher will deposit to PMC on behalf of NIH authors.
    • STM: Science, Technology and Medicine
    • SSH: Social Science and Humanities
    • 'Taylor & Francis (Psychology Press)' is an imprint of 'Taylor & Francis'
  • Classification
    ​ yellow

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Punching operations contain high shear stress gradients which can exhibit adiabatic strain rate effects in certain materials at higher speeds due to a localized reduction of thermal lattice vibrations. Ultrasonic forming is known to soften material undergoing plastic deformation by direct application of lattice vibrations. Punching speed and ultrasonic vibration amplitude effects are investigated in sheets of 1100-O aluminum. Ultrasonic vibration more than negated adiabatic strain rate effects at high speeds with reductions in punching force of up to 30%. At lower speeds, a competing effect from acoustoplastic hardening resulted in a smaller effect on punching force, but increased ductility.
    Materials and Manufacturing Processes 10/2014; 29(10).
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    ABSTRACT: The main preparation methods of ultra-long pores are carried out by mechanical or special processing over a long time, and by the casting method the aspect ratio of pores is smaller than 2. In the present article, according to weak wettability between carbon fiber and aluminum, carbon fiber was chosen as the pore-forming material then ultra-long pores were fabricated successfully by means of pulling–casting. The experimental result demonstrated that the pore aspect ratio was 495, and pore diameter was about 0.222 mm. Theoretical analysis shows that the effect of surface tension on invalid pore length can be neglected – this value was only 0.01 mm. X-ray diffraction results showed that there was almost no chemical reaction between aluminum and carbon fiber bundles, which means that undamaged carbon fiber was beneficial for pulling. Otherwise, because the carbon fiber was in a loose state previously and there were differences between actual measurement diameter and theory diameter after pore formation, loose carbon fiber bundles were easily pulled and it was helpful to realize ultra-long pore preparation.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Liquid-assisted laser machining processes are of significance in the thermal damage reduction of cut material. However, the processes suffer the poor cut quality due to the disturbance of water to the laser beam. This article firstly proposes a new technique to remedy problems found in the general underwater laser ablation method. An overflow system was incorporated in the laser machining process for introducing a uniform water layer with a steady flow on the workpiece surface. By implementing this new technique, a better cut surface quality than that obtained from dry and typical underwater laser approaches can be accomplished. It is apparent that this technique could make the normal pulse infrared lasers feasible for processing materials with low thermal damage.
    Materials and Manufacturing Processes 10/2014; 29(10).
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    ABSTRACT: In this study, porous 316L deposits were processed by flame spraying under different spray conditions aimed at controlling deposit microstructure. Scanning electron microscopy (SEM) was used to characterize the microstructure of the deposits and deposit porosity was estimated from its cross section by image analysis. Results showed that porosity of 316L deposits ranged from 20 to 55% with change in spray particle melting degrees, resulting from alteration of spray parameters. To understand the deposition mechanism, the velocity of spray particles was quantitatively measured before impact and the morphology of isolated particles deposited was characterized by SEM and three-dimensional (3D) laser microscopy to estimate the melting degree of spray particles. The relationships between melting degree, spray conditions, and deposit porosity were established. The examination showed that porous steel deposits with 3D through-deposit pore-nets were fabricated through interbonding of solid cores of semimolten spray particles. It was found that the welding of particles by the molten fraction of semimolten spray particles forms large bonding necks between deposited particles, which improved the compression strength of the porous deposits over that fabricated by other conventional processes.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Laser-assisted machining (LAM), defined as a hot machining process, combines laser technology with traditional machining method for improving material removal rates. It can reduce the cutting force and improve the processing efficiency of hard-to-wear materials, especially engineering ceramics. To enhance the processing precision of alumina ceramic turning, this article presents the results of an experimental study of a two-step laser-assisted turning process including laser-induced thermal cracking and turning. This study investigates the distribution of microcracks for different process parameters. Comparing with the results, it is observed that the mechanism of crack formation and crack types are different. The cracks are caused by thermal stress and mechanical stress, separately. Based on uniform design, a back propagation neural network model is developed to map the complex nonlinear relationship between process parameters and processing requirements. The results show that the model is an effective tool for predicting the integrity of the machined ceramic surface.
    Materials and Manufacturing Processes 10/2014; 29(10).
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    ABSTRACT: In the present work, the influence of heat input is studied on depth of penetration while depositing bead on AISI 304 stainless steel using an indigenously fabricated automatic gas metal arc welding (GMAW) movement setup. Depth of penetration and fusion zone profiles are predicted at different conditions by the bond graph modeling approach and validated using measured depth of penetration and fusion profile. The effects of heat input on toughness and metallurgical behavior are analyzed while joining AISI 304 plates using automatic GMAW. Heat input and gas flow rate significantly influence the toughness at room temperature and at −20°C. Metallurgical observations by scanning electron microscopy are carried out and it is observed that high heat input and lower cooling rate increase grain size. High heat input and rapid cooling prevent grain growth and lead to grain refinement.
    Materials and Manufacturing Processes 10/2014; 29(10).
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    ABSTRACT: Nitrogen-doped nanocrystalline anatase TiO2 powders with different nitrogen-doping concentrations were synthesized at 150°C and held for 2 h under an initial pressure of 3 MPa by the mild hydrothermal method with no postheat treatment. The X-ray photoelectron spectroscopy results confirmed that substitutional and interstitial nitrogen coexisted in the TiO2 lattice and formed Ti–N and Ti–O–N linkages, respectively. The visible light absorption of nitrogen-doped TiO2 in the wavelength 400 ∼ 550 nm was greatly enhanced compared with that of un-doped TiO2. Both optical absorption and photocatalytic efficiency were elevated with increased nitrogen-doping concentration.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Effect of conditions on the rheological and mechanical properties of virgin and recycled poly(butylene terephthalate)/polycarbonate/acrylonitrile-butadiene-styrene (PBT/PC/ABS) blends was investigated in injection molding by using Taguchi's experimental design. PBT, PC, and ABS polymers were compounded in an extruder to obtain ternary blends. Blend was recycled five times. Injection pressure, holding pressure, and injection temperature were taken into consideration as the input. Ratio of signal-to-noise (S/N) was employed to determine whether optimum conditions of control inputs could be used to achieve the highest properties. Analysis of variance was used to determine how inputs affect outputs.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: In the present study, nanocrystalline Al–Cu alloy was successfully fabricated by mechanical alloying (MA) a mixture of copper and aluminum powders and then subjecting it to spark plasma sintering (SPS). The experimental results show that Al–Cu alloy with equilibrium phases can be successful prepared by the MA and SPS process. Grain sizes of the resultant Al–Cu alloy were decreased with extended milling times of precursor powder, and alloy with grain size of ∼200 nm was obtained when milling time was increased to 20 h. MA was also found to have a significant effect on the density and hardness of the SPS-sintered compacts.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: A new method combining mechanical activation, alkali decomposition, and acid leaching is recommended for the upgrading of ilmenite concentrate. From the results of the tests described, it was shown that the rate of both decomposition and dissolution of ilmenite concentrate increased considerably following mechanical activation. Under optimum activation conditions, decomposition processing time can be reduced more than 65%. Activation also led to better leaching performance. The time necessary for complete dissolution of Ti and Fe decreased more than 80% from 120 to 15 min. These results reveal that this new process is more appropriate than other existing methods for upgrading ilmenite and also in complying with industrial requirements.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: This research used electrical discharge machining (EDM) to synthesize nanocrystalline powder from scrap cemented tungsten carbide (WC-Co). The effect of dielectric liquid (deionized water, ethanol and kerosene) and process parameters on the dimensional and structural characteristics of debris was studied. The results show that, with respect to the amount of powder synthesized in dielectric medium, deionized water performs better than ethanol and kerosene. The results of X-ray diffraction show that the existing phases in the synthesized powder are affected by the type of dielectric liquid, and different chemical compositions of the dielectric liquids lead to diverse chemical content in the produced debris. The average size of the particles produced in deionized water is the smallest, whereas substructure of the particles generated in kerosene has the smallest mean value. Debris synthesized by this method is nanostructured and can be readily converted to nanoscale WC-Co powder via heat treatment. Overall, the results show that, considering the production rate and particle size, deionized water is the best dielectric medium for nanocrystalline WC-Co precursor powder synthesis using EDM.
    Materials and Manufacturing Processes 10/2014; 29(10).
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    ABSTRACT: Optimum parameter settings for stud friction stir welding (SFSW) in underwater conditions are experimentally investigated using M12 electrical galvanized bolts of grade 8.8 and plates of S235 (St37) steel. Several sets of SFSW experiments in underwater conditions are performed without a shroud to investigate the approximate input parameter (i.e., speed, pressure, heating time, and upset) interactions. The tensile strength of each stud weld is measured to investigate welded joint performance. The pressure ranges and corresponding speeds which produce consistent strength levels are identified. Further experimentation is performed within the selected pressure ranges to investigate the variation of tensile strength. The upset is also measured as an output performance factor. The microstructure is examined to observe different regions. Hardness is measured at each region to investigate the martensite formation.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Hot compression and hot tension experiments on 9%Cr ferritic/martensitic steels were conducted by using a Gleeble 1500D thermal–mechanical simulator. Flow stress–strain data obtained from the compression tests were used to develop processing maps. Deforming mechanisms in different zeroes were summarized, and typical deformation microstructures had been observed. A thermoplastic graph under different temperatures was also obtained. The results indicate that flow stress, deformation microstructure, and power dissipation efficiency are closely connected with the hot deformation mechanism. The power dissipation rate in the flow instable domains is lower, and the corresponding microstructure can be categorized as dynamic recovery. And softer δ-ferrites are dispersed at the austenite boundaries with the help of hot deformation force. Thus, a new method of removing δ-ferrite of 9%Cr ferritic/martensitic steel is provided, and the optimum hot working condition is determined at higher temperatures (1100°C to 1250°C) and higher deformation rates (0.05 to 5 s−1).
    Materials and Manufacturing Processes 10/2014; 29(10).
  • Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: We sintered K0.5Bi0.5TiO3 ceramics by a solid-state reaction process with the addition of CuO. X-ray diffraction patterns indicate that the synthesized K0.5Bi0.5TiO3 ceramics have the cubic perovskite phase. Scanning electron microscopy images show that the addition of CuO has a marked influence on grain size and relative density of K0.5Bi0.5TiO3 ceramics. K0.5Bi0.5TiO3 ceramics have the smallest grain size and highest relative density when the weight percentage addition of CuO is 2%. The results of temperature dependence of the dielectric constant of synthesized ceramics show that they have the highest value at a temperature of about 382°C. This behavior originates from the disordered structure and fluctuations of composition in ferroelectric systems.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Tubular NiO/YSZ anode-supports of solid oxide fuel cells were prepared successfully by gelcasting process. Based on an investigation of the rheological behaviors of the ceramic particle suspensions for gelcasting, stable NiO/YSZ aqueous slurry with optimal monomer, dispersant, and solid loading is defined. The results show that the addition of pore formers influences not only the viscosity of suspensions but also the gelation rate of the gelcasting systems. Scanning electron microscope reveals that the microstructure of the green body is homogeneous and compact without apparent agglomerate or pores.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: The control of defects and forces is, respectively, necessary to produce robust components and to preserve machine tool and energy. In the present work, the variations in forces with the evolution of various SPIF (single point incremental forming) defects are studied by employing the pyramid geometry. It is found that the forming force increases as the size of pillow and wall defects increases, and contrarily decreases as the size of corner-fold increases. Further, to carry out defect-free forming, the corner requires more force than the straight-wall of pyramid (i.e., F cr > F sw). This fact appears in the form of spikes corresponding to corner location in the force curve. Therefore, online monitoring of the force curve is proposed as a strategy to control defects in SPIF. Finally, following the condition F cr > F sw, force models describing the defect–force–parameter relationship are developed. These models will help the users to simultaneously predict and optimize the force as well as defects.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: The dielectric properties of CaCu3Ti4O12 (CCTO) ceramic prepared by mechanochemical synthesis (MCS) were investigated. The effect on dielectric properties of ball-to-powder weight ratio and milling time was investigated and compared to the behavior of CCTO prepared by conventional solid state reaction (CSSR). CCTO ceramic was partially obtained after 6h of the milling process, while complete transformation was obtained during the sintering step of milled powders. It was shown that the dielectric properties of CCTO processed by MCS are dramatically improved compared with samples prepared by CSSR.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Laser direct metal deposition (LDMD) process is becoming a cost-effective and sustainable alternative to the traditional manufacturing process. However, depending on the process conditions, the high cooling rate in LDMD can result in undesirable microstructure, which can affect the performance and functionality of the manufactured component. This article reports an investigation into the microstructure that arises from LDMD of a multilayered Inconel 718 on EN-43 mild steel substrate. Using the finite element analysis package ANSYS, the investigation focused on prediction of the grain size distribution in the deposited component as a consequence of its thermal history. In agreement with results from experimental examination, the results of the investigation predicted an increase in interdendric arm spacing from the bottom towards the top of the deposited wall. This characterizes a finer microstructure at the bottom of the wall, which progressively coarsens towards the top of the wall as more layers are deposited. This variation in grain sizes gradually tapers off to a steady level after a few layers. The present model provides a simple yet effective method to estimate the microstructure in LDMD encompassing wide range of materials.
    Materials and Manufacturing Processes 10/2014; 29(10).
  • [Show abstract] [Hide abstract]
    ABSTRACT: Equal channel angular pressing (ECAP) is one of the techniques used in metal-forming processes but it runs into severe difficulties in die design. The role of friction in the die is important in regard to increasing workpiece internal stress while simultaneously reducing material strain hardening. Owing to internal stress, the workpiece fails in successive passes. This article throws light on the workability of commercially pure aluminum processed by ECAP using both conventional and new dies. The experiment was carried out for both circular and square samples of the same cross-sectional area. The samples were extruded by up to three passes in routes A and C. The ultimate tensile strength was 20% higher than in the conventional die samples. The workability of the ECAP samples is discussed from the compression test. The experimentally validated results are discussed using the Cockcroft fracture criterion. The enhanced mechanical properties, with a slight reduction in workability of the second and third passes in both routes, are discussed for both conventional and new die samples. The compressive strength is higher than the tensile strength in both dies. The new ECAP die achieved better mechanical properties than the conventional die samples and supports the same workability.
    Materials and Manufacturing Processes 10/2014; 29(10).

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