Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7984230 | Materials Science and Engineering: A | 2013 | 7 Pages |
Abstract
In medium to high carbon steels, characterized by martensite-austenite microstructure processed by quenching and partitioning process, martensite potentially provides high strength, while austenite provides work hardening [Fu, Wu, and Misra, DOI: 10.1179/1743284712/068]. Given the significant interest in these steels in the steel community, the paper reports for the first time the nanoscale deformation experiments and accompanying microstructural evolution to obtain micromechanical insights into the deformation behavior of ultrahigh strength-high ductility dual-phase steels with significant retained austenite fraction of â¼0.35. During deformation experiments with nanoindenter, dislocations were distributed on several slip systems, whereas strain-induced twinned martensite and twinning were the deformation mechanisms in carbon-enriched and thermally stabilized retained austenite. Furthermore, ultrafine dual-phase steels exhibited high strain rate sensitivity.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
R.D.K. Misra, P. Venkatsurya, K.M. Wu, L.P. Karjalainen,