A5009889729- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Corrosion Behavior and Inhibition
- Metallurgy and Material Forming
- Magnetic Properties and Applications
- Metal and Thin Film Mechanics
- Concrete Corrosion and Durability
- Metal Forming Simulation Techniques
- Metallurgical Processes and Thermodynamics
- Advanced materials and composites
- Advanced machining processes and optimization
- Welding Techniques and Residual Stresses
- Advanced ceramic materials synthesis
- High-Temperature Coating Behaviors
- Anodic Oxide Films and Nanostructures
- Microstructure and mechanical properties
- Advanced Surface Polishing Techniques
- Aluminum Alloy Microstructure Properties
- Mechanical Behavior of Composites
- Fatigue and fracture mechanics
- Aluminum Alloys Composites Properties
- Engineering Diagnostics and Reliability
- Textile materials and evaluations
- Silicone and Siloxane Chemistry
Universidad de Santiago de Chile
2015-2024
Chilean Air Force
2018
Academia Politécnica Aeronáutica
2018
Universidad Bernardo O'Higgins
2017
University of Matanzas
2016
Metallurgical Research Institute
2004
Centro de Estudios e Investigaciones Técnicas de Gipuzkoa
1998-2000
This research reports on numerical simulations of the multi-pass laser forming process aimed at obtaining cylindrical surfaces from planar AISI 304 stainless-steel sheets. The effect power, scanning speed, and distance between irradiation lines thermomechanical material response is assessed, with particular emphasis final curvature radius, maximum temperature, plastic deformation. To this end, a coupled finite element formulation applied to analysis different experimental tests reported in...
There is great interest in the steel industry of incorporating new products that go beyond properties existing ones. Among these properties, corrosion resistance extremely important for countries that, like Chile, have an extensive ocean coastline. In costal zones, chloride ions air produce reduces service life structures. For this reason, it utmost importance to study influence different alloying elements such as nickel, which lead improve steel's marine corrosion. context development types...
The microstructure and texture evolution of cold-rolled low carbon steel after ultrafast heating quenching is investigated. Experiments were carried out at rates 150 °C/s 1500 °C/s. recrystallization ferrite studied by scanning electron microscopy backscattered diffraction techniques. cold rolled during was studied, making it possible to estimate the precise effect rate on orientations newly formed grains. experimental results showed that not completed before full transformation austenite....
Ultrafast heating (UFH) experiments have been carried out in cold rolled ultra low carbon (ULC) steel, followed by quenching. The selected rates are the range between 10 and 800 °C s−1. recrystallization curves slightly shifted to higher temperatures as rate is increased. average recrystallized grain size texture virtually unaffected increasing rate. Nucleation took place at boundaries well inside deformed grains. Electron backscattered diffraction (EBSD) analysis reveals that of grains...
The effect of heating rate on the formation and decomposition austenite was investigated cold-rolled low carbon steel. Experiments were performed at two rates, 150 °C/s 1500 °C/s, respectively. microstructures characterized by means scanning electron microscopy (SEM) backscattered diffraction (EBSD). Experimental evidence nucleation in α/θ, as well α/α boundaries is analyzed from thermodynamic point view. increase rates to has an impact morphology intercritical range. mechanism combining...
ABSTRACT The S‐N‐P (stress, number of cycles, failure probability) curves for 2024 T3 and 7075 T7351 aluminium alloys were obtained. Previously, surface treatments degreasing different types anodizing applied to samples, evaluating the influence these on fatigue life alloys. determination was done using Maennig's method. Rotary used because this technique produces greater stress sample surfaces, zone in which it is important evaluate resistance. Both transition range finite evaluated,...
This paper presents an experimental analysis and a numerical simulation of the mechanical behaviour experienced during tensile test by both cylindrical strip specimens different materials for which classical so-called Bridgman's procedure aimed at predicting stress distribution necking zone cannot be directly applied. A set experiments has been carried out in order to derive elastic hardening parameters that characterize material response. The deformation process whole is performed with...
TRIP-assisted CMnSiAl steels with a fully martensitic initial microstructure have been studied in order to investigate the effect of partial substitution Si by Al. The steel was fabricated casting sand mold, hot forged, homogenizing, rolling, cold intercritical annealing, and finally, an isothermal bainitic treatment. During annealing at 1023 K (750 °C) for 420 s, matrix consisting 50% proeutectoid ferrite induced after treatment 663 (390 300 ferrite, bainite, retained austenite obtained....
This article investigated the influence of copper (Cu) and nickel (Ni) on atmospheric corrosion in gray cast iron under simulated marine conditions. The goal was to compare effect Cu Ni addition castings with weathering steels. Selected alloys were cast, cut, prepared, heat-treated for microstructure homogenization. Accelerated tests conducted using a salt spray chamber. Corroded samples analyzed thickness deposits scanning electron microscopy, X-ray diffraction, electrochemical techniques....
This paper presents the characterization of a secondary cone crusher concave liner made Hadfield steel used in Chilean mining after crushing copper minerals during all service life. During use, suffers indentation (cold working) and abrasion; this combination provides with layer that constantly renews itself, maintaining surface highly resistant to abrasive wear. The results presented here were obtained using optical microscopy, microhardness test, measuring abrasion dry sand/rubber wheel...
The objective of the present study is to analyze microstructure and mechanical properties a twinning-induced plasticity (TWIP) steel at different temperatures. For this purpose, tensile tests were performed on Fe-22Mn-0.65C TWIP in temperature range between 25 °C 400 °C. after deformation was characterized via optical microscopy. It observed that consists mainly twins low temperatures, whereas dislocation bands are predominating feature high analysis data suggests transition mechanism from...
The deposition rate of Cl− and SO42− ions involved in the corrosion under marine aerosol influence was monitored by using different retention methods: alkaline sulfation plate, wet candle dry plate. It is known that Cl−/SO42− ratio sea water near 7. Hence, this relationship experimental data (both collected same method), origin unraveled. Inconsistent Cl−/SO4−2 ratios were obtained when values for both determined at collectors locations.
Poisson's ratio and birefringence, both measured by ultrasound, are used to follow the evolution of anisotropy in ASTM A-36 steel plates cold-rolled between 5 50% deformation, then subjected recrystallization at 900 1000 ºC. Times flight longitudinal shear waves along thickness were measured. As orthotropy increases, birefringence difference ratios using a wave polarized length another width plate, linearly related degree deformation hardness. In addition, ultrasonic methods clearly detected...
In order to determine if heat treatments can be discerned by nondestructive ultrasonic testing, samples of SAE 1045 and 4140 steels were subjected the classical annealing, normalizing, quenching, quenching tempering, their elastics constants, Young's, shear Poisson's moduli, monitored ultrasound. Results show that microstructural differences associated various generate on elastic constants effectively use longitudinal waves. Special attention is given modulus, since for its determination...