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23-08-2016 | Communication | Issue 11/2016

Metallurgical and Materials Transactions A 11/2016

Influence of the Initial Microstructure on the Heat Treatment Response and Tensile Properties of TRIP-Assisted Steel

Journal:
Metallurgical and Materials Transactions A > Issue 11/2016
Authors:
Kyooyoung Lee, Joo Hyun Ryu, Sea Woong Lee, Won Hwi Lee, Jeong In Kim, Dong-Woo Suh
Important notes
Manuscript submitted April 21, 2016.

Abstract

Microstructure evolution and mechanical properties were investigated in transformation-induced plasticity (TRIP) steel having a different initial microstructure. Compared with the cold-rolled structure that evolves into a typical microstructure of TRIP steel, the martensitic initial structure produces a more lath-type microstructure as the fraction of retained austenite increases in the initial microstructure. The interlath austenite after heat treatment contributes to improving the tensile properties by the enhanced stability and the refinement of the matrix phase.

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