Grain-orientation-dependent of γ-ε-α′ transformation and twinning in a super-high-strength, high ductility austenitic Mn-steel

被引：46

作者：

Eskandari, M. ^{[1
]}

Zarei-Hanzaki, A. ^{[2
]}

Mohtadi-Bonab, M. A. ^{[3
]}

Onuki, Y. ^{[4
]}

Basu, R. ^{[5
]}

Asghari, A. ^{[6
]}

Szpunar, J. A. ^{[7
]}

机构：

[1] Shahid Chamran Univ Ahvaz, Fac Engn, Dept Mat Sci & Engn, Ahvaz, Iran

[2] Univ Tehran, Sch Met & Mat Engn, Hot Deformat & Thermomech Proc High Performance E, Tehran, Iran

[3] Univ Bonab, Dept Mech Engn, Velayat Highway, Bonab, Iran

[4] Ibaraki Univ, Frontier Res Ctr Appl Atom Sci, Mito, Ibaraki, Japan

[5] ITM Univ, Dept Mech Engn, Gurgaon, India

[6] Univ Texas San Antonio, Elect & Comp Engn Dept, San Antonio, TX USA

[7] Univ Saskatchewan, Dept Mech Engn, Adv Mat Clean Energy, Saskatoon, SK S7N 0W0, Canada

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 674卷

关键词：

Austenitic steel; Deformation; Orientations; EBSD; STRAIN-HARDENING BEHAVIOR; INDUCED PLASTICITY STEELS; STACKING-FAULT ENERGY; MARTENSITIC-TRANSFORMATION; SINGLE-CRYSTALS; DEFORMATION-BEHAVIOR; PHASE-TRANSFORMATION; TENSILE DEFORMATION; STAINLESS-STEELS; TEXTURE;

D O I：

10.1016/j.msea.2016.08.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A newly developed, austenitic lightweight steel, containing a low-density element, Al, exhibits tensile elongation up to 50% as well as high ultimate-tensile stress (tensile fracture at 1800 MPa) without necking behavior. Electron backscatter diffraction analysis is carried out to investigate the orientation dependence of the martensitic transformation in tensile testing to 30% strain at 323 K (25 degrees C). A pronounced gamma ->epsilon ->alpha' transformation is observed in <111 > and < 110 > parallel to TD (TD: tensile direction) gamma-grains. The alpha'-transformation textures is analyzed. Large misorientation spreads is seen in the < 100 > parallel to TD gamma-grains. Interestingly, twin-assisted martensitic transformation is detected in the < 111 > parallel to TD followed by the twin boundary directly moving to a gamma/alpha' phase boundary. These phenomena are related to a change of Schmid factor for different orientations of grains. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：514 / 528

页数：15

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