Interpretation of dynamic tensile behavior by austenite stability in ferrite-austenite duplex lightweight steels.

ABSTRACT: Phenomena occurring in duplex lightweight steels under dynamic loading are hardly investigated, although its understanding is essentially needed in applications of automotive steels. In this study, quasi-static and dynamic tensile properties of duplex lightweight steels were investigated by focusing on how TRIP and TWIP mechanisms were varied under the quasi-static and dynamic loading conditions. As the annealing temperature increased, the grain size and volume fraction of austenite increased, thereby gradually decreasing austenite stability. The strain-hardening rate curves displayed a multiple-stage strain-hardening behavior, which was closely related with deformation mechanisms. Under the dynamic loading, the temperature rise due to adiabatic heating raised the austenite stability, whic

SUBMITTER: Park J 

PROVIDER: S-EPMC5691137 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature