A5045627379- Metal Alloys Wear and Properties
- Microstructure and Mechanical Properties of Steels
- Metallurgical Processes and Thermodynamics
- Metallurgy and Material Forming
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal and Thin Film Mechanics
- Advanced Materials Characterization Techniques
- Electronic Packaging and Soldering Technologies
- Advanced machining processes and optimization
- Microstructure and mechanical properties
- Fatigue and fracture mechanics
- Advanced ceramic materials synthesis
- Metal Forming Simulation Techniques
- High Temperature Alloys and Creep
- Surface Treatment and Residual Stress
- Corrosion Behavior and Inhibition
Sidenor (Greece)
2005-2018
Gerdau (Spain)
2012-2014
The present study is concerned with the potential of high carbon, silicon steel grades isothermally transformed to bainite at low temperature (<300°C). first part gives an overview design principles, allowing very strength and ductility be achieved while minimising transformation duration. Wear fatigue properties are then investigated for over 10 variants such materials, manufactured in laboratory or industrially. results discussed against published data. Tensile strengths above 2 GPa...
It is not the first time that a consortium of steel makers, end users and scientists up with unique approaches developments in physical metallurgy steels. The present paper reveals scientific technological sharing common intrigue interest for microstructure, nanostructured bainite. Also known as low temperature bainite, its properties rely solely on scale miscrostructure obtained by heat treatment at (150–350°C). Careful design based phase transformation theory, some well facts necessary...
AbstractThis paper summarises an ECSC project (1997-2000) involving as partners Sidenor I + D, Saarstahl AG, voestalpine Stahl Donawitz GmbH, Haldex Garphyttan Wire AB, and Innotec GmbH. Modification of the inclusion type, aiming for deformable non-metallic inclusions, which are less hazardous machining fatigue behaviour engineering steels, has been focus research work. This leads to use a Si killed route control secondary steelmaking process place composition on zone low melting point...
Very‐high‐cycle‐fatigue (VHCF) strength properties are of interest to several technical applications assessed globally at different laboratories with long‐life fatigue testing capabilities. Also, VHCF failure mechanisms a scientific topic remaining open research questions. Herein, three automotive bar grade steels studied respect and initiation mechanisms. A microalloyed ferritic–pearlitic steel (38MnSiV5, 870 MPa tensile strength), quenched tempered martensitic (50CrV4, 1410 carburizing...
In the last decades, low-density steels for forging have increasing interest in automotive industry, and good mechanical properties are required their real application. This paper describes results obtained a 0.66C11.4Mn9.9Al duplex austenitic steel after applying set of isothermal treatments at different combinations time temperature, aimed to promote kappa carbide precipitation, improve with water quenching treatment. The effects on microstructure been analyzed compared those from heat We...
In the last years numerous works have been done to try reduce car weight in order decrease CO 2 emissions. this line, Low Density Steels can be considered as one alternative lightweight approximation strategy [1-2] for automotive industry. Generally, low density steels, a considerable amount of Aluminum is added overall steel density, but high contents lead processing drawback, that make it difficult bring these new/lighter grades into market. literature, different found most them are aimed...
Difficulties found when manufacturing and forging two low density steels in different scales are described this work. Austenitic duplex low-density have attracted a lot of interest due to their good combination mechanical properties reduction. In work, the fabrication 1.3 C30Mn10Al austenitic steel 0.65 C12Mn10Al been studied. The scaling up process from 1 Kg 35 ingots both materials subsequent hot is described, showing difficulties encountered during production transformation these steels....
Abstract In recent decades, highly alloyed low-density steels are being developed to reduce the weight of different automotive parts. Dilatometry can be a very useful experimental technique understand phase transformations during heating or cooling new steel alloys. When performing dilatometry measurements some assumptions made such as homogeneity sample material tested experiment. this study, tests were performed for two steels, and variations composition between surface inner part...
Con objeto de evaluar la influencia las inclusiones sobre vida a fatiga, se ha realizado un estudio componentes acero rodamientos 100Cr6 determinando, en cada caso, causas del fallo por fatiga. El material, procedente dos coladas fabricadas con distinto proceso, forjó caliente para obtener finales forma anillo que, posteriormente, ensayaron fatiga compresión-compresión. Tras analizar los fallos mediante microscopía electrónica SFEM (Scanning Field Emission Microscopy), comprobó que mayoría...
Abstract However, while low pressure carburizing (LPC) is now well established for smaller components and conventional conditions (up to 980 °C), a number of difficulties are expected when considering high temperature LPC large components. First, steels will undergo extensive grain growth during an exposure 1050 °C 20 hours; there solutions avoid the problem shorter durations, no materials adapted such heat-treatment durations. Second, long at means that possibility significant creep...