Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Rate effects on transformation kinetics in a metastable austenitic stainless steel

Published

Author(s)

Rakan Alturk, William E. Luecke, Steven P. Mates, A Araujo, K. S. Raghavan, Fadi Abu-Farha

Abstract

In this study, the effects of strain rate on the mechanical properties and the strain-induced austenite-to-martensite transformation in 201 austenitic stainless steel (SS201) were investigated. This grade was selected as a low-cost stainless steel with good lightweighting potentials for automotive applications. The material was tested in tension at a quasi-static rate (5x10^-2 s^-1 ), two low-intermediate rates (10^0 s^-1 and 10^1 s^-1 ), and a high rate (5x10^2 s^-1 ). 3D digital image correlation was used to enable accurate strain measurements during mechanical testing. Magnetic induction and X-ray diffraction were used ex-situ of deformation to measure the volume fraction of martensite formed at each strain rate, for different plastic strain levels. The effects of strain rate on deformation-induced martensite formation and on the stress/strain behavior was captured, and was compared to the results reported in the literature for 3xx austenitic stainless steels. The results show a favourable response for the SS201, which exhibits a substantial increase in strength and energy absorption at high rates without compromising tensile ductility.
Citation
Procedia Engineering
Volume
207

Keywords

austenitic , stainless steel , high-rate , mechanical properties

Citation

Alturk, R. , Luecke, W. , Mates, S. , Araujo, A. , , K. and Abu-Farha, F. (2017), Rate effects on transformation kinetics in a metastable austenitic stainless steel, Procedia Engineering, [online], https://doi.org/10.1016/j.proeng.2017.10.1059 (Accessed July 31, 2021)
Created November 15, 2017, Updated February 6, 2020