Alberto Monsalve's research while affiliated with University of Santiago, Chile and other places

Publications (38)

Article
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The carbide precipitation kinetics in a Fe-22Mn-0.45C TWIP steel subjected to three different cold-deformation levels, annealed at various temperatures, were studied. The studied carbides included chemical compositions, morphology, precipitation sites, volume fraction, and size. Manganese carbides were precipitated in a temperature range between 52...
Article
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TRIP-assisted CMnSiAl steels with a fully martensitic initial microstructure have been studied in order to investigate the effect of partial substitution of Si by Al. The steel was fabricated by casting in a sand mold, hot forged, homogenizing, hot rolling, cold rolling, intercritical annealing, and finally, an isothermal bainitic treatment. During...
Article
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The evolution of the elastic constants, , and Poisson’s ratio and acoustic birefringence of a Fe-0.5 wt% C-21.5 wt% Mn twinning-induced plasticity (TWIP) steel with reduction by cold rolling and recrystallization annealing was assessed from measurements of the times of flight of ultrasonic waves propagating along the thickness of the rolled plates....
Article
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Four TRIP (Transformation Induced Plasticity) assisted steels, three TBF (TRIP Bainitic Ferrite) steels and one TPF (TRIP Polygonal Ferrite) steel, were manufactured from three different carbon contents (0.2, 0.3 and 0.4 wt.% C), to study the evolution of their microstructure and tensile mechanical properties in 15 mm thick plates. TBF steels were...
Article
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This paper presents the characterization of a secondary cone crusher concave liner made of Hadfield steel used in Chilean mining after crushing copper minerals during all service life. During use, a cone crusher concave liner suffers indentation (cold working) and abrasion; this combination provides the concave with a layer that constantly renews i...
Article
Durante la realización de este trabajo se aunaron las fuerzas de dos empresas, una siderúrgica proveedora del alambrón y una fábrica de electrodos de soldadura AWS 70S-6. Éstos se fabrican a partir de rollos continuos en básicamente dos etapas de trefilación: en seco, que consta de 9 hileras aplicando reducciones desde los 6,00 mm hasta los 2,21 mm...
Article
Los aceros TWIP, Twinning-Induced Plasticity (plasticidad inducida por maclado) están incluidos en el grupo de los denominados segunda generación de aceros avanzados de alta resistencia. Son aceros con alto contenido de manga- neso (20% en peso aproximadamente) y totalmente austeníticos a temperatura ambiente. Tienen, a priori, un elevado potencial...
Article
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This article is focused on the mechanical behavior and its relationship with the microstructural changes observed in two high-manganese steels presenting twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP), namely Steel B and Steel C, respectively. Chemical compositions were similar in manganese, but carbon content of St...
Article
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In this work, the engineering stress–strain tensile curve and the force-deflection bending curve of two Dual-Phase (DP) steels are modeled, combining the mechanical data of fully ferritic and fully martensitic steels. The data is coupled by a modified law of mixture, which includes a partition parameter q that takes into account the strength and st...
Article
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This work is the contribution of two industries: the first, a steel company that fabricates the wire and the second, which fabricates electrodes for welding. These electrodes, under the standard AWS 70S-6, are fabricated in a continuous process consisting of two stages: dry drawing, with nine dies applying reductions from 6 up to 1.73 mm; the secon...
Article
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The microstructure of low-alloy multiphase transformation-induced plasticity (TRIP) steels consists of ferrite, bainite, and metastable retained austenite, which can be transformed into martensite by plastic deformation. In some cases, residual martensite can be present in the initial microstructure. The mechanical behavior of these steels depends...
Article
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Mechanical properties in tension, bending, fatigue and lap-shear in two different proportions (0.5%wt and 1%wt) of TRGO (Thermally Reduced Graphite Oxide) doped ARALL (Aramid Aluminium Laminate) were examined. The materials and their failure modes were characterized morphologically by examination through SEM (Scanning Electron Microscopy). Some mec...
Article
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The influence on multi walled carbon nanotubes (MWCNT, or simply CNT) as a reinforcement material in an epoxy resin in order to decrease the fatigue crack propagation rate in the 2024 T3 aeronautical Al alloy was studied. CT samples were pre-cracked in a resonant fatigue machine until a 4 mm pre-crack length. Four groups of samples were considered:...
Article
Full-text available
Mechanical properties in tension, bending, fatigue and lap-shear in two different proportions (0.5%wt and 1%wt) of TRGO (Thermally Reduced Graphite Oxide) doped ARALL (Aramid Aluminium Laminate) were examined. The materials and their failure modes were characterized morphologically by examination through SEM (Scanning Electron Microscopy). Some mec...
Article
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The effect that the microstructure exerts on the Transformation-Induced Plasticity (TRIP) phenomenon and on the mechanical properties in a multiphase steel was studied. Samples of an initially cold-rolled ferrite–pearlite steel underwent different intercritical annealing treatments at 750 °C until equal fractions of austenite/ferrite were reached;...
Article
Purpose This paper aims to analyse the surface evolution of pure recycled titanium subjected to isothermal and cyclic oxidation conditions using dry air as oxidant gas. It is important to mention that the cyclic oxidation behaviour of pure titanium is a process that has been barely studied. Design/methodology/approach An isothermal and cyclic oxid...
Article
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The objective of the present study is to analyze the microstructure and mechanical properties of a twinning-induced plasticity (TWIP) steel at different temperatures. For this purpose, tensile tests were performed on a Fe-22Mn-0.65C TWIP steel in a temperature range between 25 °C and 400 °C. The microstructure after deformation was characterized vi...
Article
Corrosion inhibitors with Cr⁺⁶ and Cr⁺³ are applied on the surface of metals to increase their chemical resistance when they are exposed to severe degradation conditions. For galvanized low-carbon steel strip, these compounds are applied to reduce corrosion mainly during transport operations of this metal. The performance of corrosion inhibitors de...
Article
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In order to determine if heat treatments can be discerned by nondestructive ultrasonic testing, samples of SAE 1045 and SAE 4140 steels were subjected to the classical heat treatments of annealing, normalizing, quenching, and quenching and tempering, and their elastics constants, Young's, shear and Poisson's moduli, were monitored by ultrasound. Re...
Article
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Poisson's ratio and birefringence, both measured by ultrasound, are used to follow the evolution of the anisotropy in ASTM A-36 steel plates cold-rolled between 5 and 50% deformation, and then subjected to recrystallization at 900 and 1000 ºC. Times of flight of longitudinal and shear waves along the thickness of the plates were measured. As orthot...
Article
Purpose High silicon amorphous steels are gaining preference as the material of choice for the fabrication of the core of low and medium power electrical transformers because they present a better electromagnetic behaviour compared to that offered by common grain-oriented and non-oriented high silicon steels. This study aims to investigate the eff...
Article
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RESUMEN De acuerdo a datos del último censo de la producción de la industria de las fundiciones [1], se observó que aproximadamente el 46% de la producción en la industria de las aleaciones ferrosas corresponde a la fundición gris. Por ello que se hace interesante el investigar la resistencia que posee este material a l a corrosión atmosférica, y a...
Article
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The effect of heating rate on the formation and decomposition of austenite was investigated on cold-rolled low carbon steel. Experiments were performed at two heating rates, 150 °C/s and 1500 °C/s, respectively. The microstructures were characterized by means of scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD). Exper...
Article
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The microstructure and texture evolution of cold-rolled low carbon steel after ultrafast heating and quenching is investigated. Experiments were carried out at heating rates of 150 °C/s and 1500 °C/s. The recrystallization of ferrite is studied by scanning electron microscopy and electron backscattered diffraction techniques. The texture evolution...
Article
Ultrafast heating (UFH) experiments have been carried out in cold rolled ultra low carbon (ULC) steel, followed by quenching. The selected heating rates are in the range between 10 and 800 °C s−1. The recrystallization curves are slightly shifted to higher temperatures as the heating rate is increased. The average recrystallized grain size and text...
Article
The mechanical properties and microstructural characteristics of a steel able to sustain the TRIP-effect were studied. The material was prepared by taking in mind the partial substitution of silicon by aluminum following a processing route that included hot forging, hot and cold rolling, intercritical annealing, and a final bainitic isothermal trea...
Article
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The steel industry constantly faces the challenge of developing new and better steels for diverse needs, on of this necessities is the use of structural steels with higher corrosion resistance to marine atmospheres and improved mechanical properties than those that currently exist. Therefore, it is necessary to systematically research both the infl...
Article
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There is a great interest in the steel industry to incorporate new products in the market with better properties of those already in production. Among these properties, corrosion resistance is of great importance for countries with a large marine seacoast, like Chile, where chloride ions from sea spray produce corrosion, leading to irreversible fai...
Article
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A TWIP steel (0.65%C; 22%Mn; 0.28%Cr; 0.16%Si) was produced in the laboratory by melting, casting, hot forging and hot rolling. The relationship between mechanical twinning fraction and mechanical behavior of this steel was studied through tension tests at the following temperatures: 25, 300, 325, 350, 375 and 400°C. Fracture toughness was measured...
Article
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Production of hot rolled steel strip is carried out at temperatures at which oxidation is prone to occur. The oxide crust is subjected to stresses that are originated while growing or are due to the difference between the thermal expansion coefficients of steel and oxide. It is considered that the oxide crust will be in tension when the temperature...
Article
This paper presents an experimental and numerical analysis for the description of the mechanical behaviour of a carbon steel wire during an industrial process of damp drawing. Firstly, an experimental procedure aimed at measuring wire drawing forces in the twelve reductions present in the process was performed. Secondly, tensile tests were carried...
Article
Full-text available
This paper presents an experimental and numerical analysis for the description of the mechanical behaviour of a carbon steel wire during an industrial process of damp drawing. Firstly, an experimental procedure aimed at measuring wire drawing forces in the twelve reductions present in the process was performed. Secondly, tensile tests were carried...
Article
This paper presents an experimental and numerical analysis for the description of the mechanical behaviour of a carbon steel wire during an industrial process of damp drawing. Firstly, an experimental procedure aimed at measuring wire drawing forces in the twelve reductions present in the process was performed. Secondly, tensile tests were carried...
Conference Paper
Full-text available
En este trabajo se propone analizar diferentes metodologías para la medición del índice de anisotropía de Lankford en chapas delgadas para embutición profunda. Se realiza un estudio de sensibilidad de dicho índice en una probeta plana a través de una simulación con el método de elementos finitos utilizando un modelo de endurecimiento plástico por d...
Conference Paper
Full-text available
Se ha realizado una secuencia de ensayos tendientes a caracterizar la rotura a tracción de la aleación de aluminio 7075 T7351 usada en la industria aeronáutica. Para cada ensayo se han medido la evolución de la carga, el alargamiento y el diámetro instantáneo en el cuello. Con estos datos se calibran los parámetros elásticos y plásticos del modelo...
Conference Paper
Full-text available
RESUMEN En este trabajo se propone analizar experimental y numéricamente el comportamiento mecánico de una probeta cilíndrica utilizada en el ensayo de tracción. Para ello se realizaron una serie de ensayos en probetas de acero SAE 1020 sujetos a las condiciones establecidas por la norma ASTM (E 8M). Este ensayo permite evaluar las propiedades del...
Article
Full-text available
In this work an experimental and numerical study of the mechanical behaviour of the 7075 T7351 aluminium alloy in the tensile test using flat samples is proposed. For this purpose a set of experiences were carried out and a three-dimensional simulation of the deformation process during the test by means of an elastoplastic formulation of large defo...

Citations

... According to the conventional approach [1,37,38], the IA temperature is chosen to acquire 40-65 vol.% of polygonal ferrite, providing the high ductility required for optimal steel formability. In support of this, Guzman and Monsalve [39] recently reported that 57 vol.% of ferrite is optimal for the mechanical behavior of CMnSiAl TRIP-assisted steel. However, adding other alloying elements (Cr, Mo, V, etc.) into TRIP-assisted steel may alter the thermodynamic activity of carbon in the γFe and αFe phases, accelerating the formation of cementite during bainite transformation [40]. ...
... The crack extension was obtained by linear regression of only the unload part of the unload/reload cycle. Young's modulus (E) and Poisson's modulus (ν) employed in the calculations were 189 GPa and 0,27 respectively [23]. These values were obtained by nondestructive ultrasonic tests and agree with those reported by Reeh at room temperature [24]. ...
... It is remarked that from the metallurgical point of view, both the grain sizes and microstructural arrays of distinctive materials and alloys have important roles in the resulting material's properties (e.g., mechanical and corrosion behaviors), as previously reported [29][30][31][32][33][34][35][36]. In this study, the weldability of these steels is studied based on the ...
... Изношенный слой обнажает новый, в котором вновь формируется мартенситная износостойкая структура. Данный процесс воспроизводится многократно до разрушения детали или выхода из эксплуатации [3][4][5]. ...
... Fracture properties were obtained by offline processing the collected data sets with a script developed in MATLAB according to the treatment stated in ASTM E1820-20 [19]. Fig. 2 shows a general view of the equipment used to perform the tests, as previously described [20,21]. ...
... The effect of carbon on classical mechanical properties and microstructure has been previously studied in two high-manganese alloys, one with only TWIP-effect and the other with TRIP-effect [18]. Higher values of ultimate tensile strength, yield stress, elongation to fracture and impact toughness were obtained in the TWIP-aided steel, which demonstrated that mechanical twinning offers superior performance than the strain-induced γ FCC → ε HCP transformation for the studied compositions. ...
... TRIP steels are supposed to have a maximum 15% volume fraction of retained austenite in their structures following a bainitic transformation [1,2]. In order to obtain the optimum volume fraction of retained austenite, as well as other constituents such as ferrite, bainite and even martensite, TRIP steels are submitted to a partial austenitization followed by an isothermal quenching for bainitic transformation [3,4]. ...
... The tensile strength of Arall sample was calculated as 325.1 MPa by dividing the maximum tensile force obtained by the cross-sectional area of the sample. Although the calculated result is compatible with the literature data (390 MPa), the small differences are due to the strength-enhancing heat treatment of the aluminum alloy used in other studies [9]. ...
... That work foundd that CFRP patching is a feasible choice for repairing damaged metal structures. Monsalve et al. [18] selected CNTs as a reinforcement in epoxy resin to decrease the fatigue crack propagation rate in a 2024 T3 Al alloy. The results showed that a small amount of CNTs is helpful in extending the life of Al alloy structures with fatigue crack propagation. ...
... After different quenching and tempering processes, the microtexture is mainly concentrated near the {554}<225> orientation for specimen No. 2, and it has been suggested that this kind of orientation is beneficial to the drawing properties [30]. In com- ...