Influence of Al content and precipitation state on the mechanical behavior of austenitic high-Mn low-density steels

被引：288

作者：

Gutierrez-Urrutia, I. ^{[1
]}

Raabe, D. ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

来源：

SCRIPTA MATERIALIA | 2013年 / 68卷 / 06期

关键词：

Austenitic steels; Carbides; Work hardening; Dislocation structure; Electron diffraction; GRAIN-BOUNDARY PRECIPITATION; C TWIP STEEL; INDUCED PLASTICITY; HIGH-STRENGTH; DEFORMATION; DISLOCATION; DUCTILITY; ALLOYS; SUBSTRUCTURE; EVOLUTION;

D O I：

10.1016/j.scriptamat.2012.08.038

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigate the strain hardening of two austenitic high-Mn low density steels, namely, Fe-30.5Mn-2.1Al-1.2C and Fe-30.5Mn-8.0Al-1.2C (wt.%), containing different precipitation states. The strain hardening of the alloy with low Al content is attributed to dislocation and twin substructures. The precipitation of intergranular M3C-type carbides strongly influences the fracture mode. We associate the strain hardening behavior of the alloy with high Al content to the precipitation of shearable nanosized kappa-carbides and their role in the development of planar dislocation substructures. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：343 / 347

页数：5

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