Journal
SCRIPTA MATERIALIA
Volume 201, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2021.113955
Keywords
Martensitic steels; Chemical heterogeneity; Austenite stability; Cementite; Transformation induced plasticity (TRIP)
Ask authors/readers for more resources
In this study, nano-sized austenite particles were produced in as-quenched martensite, improving the tensile properties of advanced high strength steel. The highly stable austenite particles with a persistent TRIP effect contribute to a remarkable improvement in tensile ductility without compromising tensile strength.
Austenite plays a key role to improve tensile properties of advanced high strength steel (AHSS). In this study, nano-sized austenite particle was produced in as-quenched martensite by using chemically het-erogeneous initial microstructure consisting of Mn-enriched cementite and ferritic matrix. Mn-enriched cementite transforms into nano-sized austenite during austenitzation and considerable amount of them retain after cooling to ambient temperature. The austenite particles have an exceptional stability, which cannot be fully interpreted with the Mn enrichment. Possible contributions from the compressive stress and the C partitioning into the austenite are considered. A persistent TRIP effect by highly stable austenite contributes to remarkable improvement of tensile ductility without compromising tensile strength even in the as-quenched martensite. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available