Special Issue "Formation and Behavior of Metastable Austenite in Advanced High Strength Steels"
Deadline for manuscript submissions: 30 April 2020.
On sabbatical leave to Department of Mechanical Enginnering, Khalifa University, Abu Dhabi, UAE.
Interests: Physical metallurgy; computational alloy thermodynamics and kinetics; ICME; alloy and process design; metastable austenite in steels; TRIP effects in steels
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The historical development of advanced high strength steels (AHHS) includes 1st, 2nd and 3rd generation AHHS. The 1st generation basically includes low-alloy steels with ferritic matrix and multiphase microstructure. Low-alloy TRIP steels, which belong to the 1st generation, are multiphase steels containing metastable retained austenite, exhibiting the TRIP effect. The 2nd generation AHHS steels include high-alloy steels containing a high amount of manganese. These steels exhibit a fully-austenitic microstructure and the deformation-induced γ→ε and ε→α’ transformations influence their mechanical behavior. The 3rd generation AHHS steels include steels with mechanical properties filling the gap between the 1st and 2nd generations. Quench & Partitioning (Q&P) and Medium-Mn steels are examples of 3rd generation AHHS steels.
Regarding the TRIP effect, a common characteristic of these steel groups, is the presence of metastable austenite in their microstructure. The austenite phase can either be homogeneous (2nd generation) or dispersed (1st and 3rd generations) in a multi-phase microstructure. The behavior of the austenitic phase during forming or loading determines the mechanical behavior in terms of strength, ductility and formability of the above steel grades. The behavior of austenite depends, on microstructural details such as size and shape of austenite as well as neighborness with other phases, which are established during processing. The stability of austenite has been recognized as the key issue controlling the mechanical behavior of austenite-containing steels and significant research is currently focused on the control of austenite stability in order to design optimized high-performance steel grades.
This Special Issue, “Formation and Behavior of Metastable Austenite in Advanced High-Strength Steels”, will include research papers and reviews on all aspects of metastable austenite in steels including, but not limited to, advanced processing of austenite-containing steels, austenite formation during heat treatment, microstructure development, solute partitioning and stabilization, effects of chemical composition, size, shape and triaxiality on austenite stability, stacking fault energy (SFE) effects, deformation-induced transformation under monotonic uniaxial or multiaxial loading, as well as cyclic loading, advanced experimental techniques to monitor the deformation-induced austenite transformation, modeling and simulation and finally alloy and process design for enhanced TRIP effects.
Prof. Gregory N. Haidemenopoulos
Manuscript Submission Information
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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- Thermodynamics and kinetics of austenite formation
- Processing for austenite stabilization
- Austenite stability
- Stress-assisted and strain-induced transformation kinetics
- Mechanical effects of austenite transformation under monotonic or cyclic loading
- Microstructural characterization of metastable retained austenite
- Hydrogen embrittlement and austenite in steels
- Alloy design for austenite-containing steels
- Modeling the formation and behavior of austenite in steels
- Deformation-induced transformation and constitutive behavior
- Low alloy TRIP steels
- TWIP steels
- High-Mn TRIP steels
- Q&P TRIP steels
- Medium-Mn TRIP steels
- Bainitic steels containing retained austenite
- High-Entropy steels with TRIP effect