Effect of the loading mode on the evolution of the deformation mechanisms in randomly textured magnesium polycrystals - Comparison of experimental and modeling results

被引：92

作者：

Mathis, K. ^{[1
]}

Csiszar, G. ^{[2
,3
]}

Capek, J. ^{[1
]}

Gubicza, J. ^{[2
]}

Clausen, B. ^{[4
]}

Lukas, P. ^{[5
]}

Vinogradov, A. ^{[6
]}

Agnew, S. R. ^{[7
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, Dept Phys Mat, CR-12116 Prague, Czech Republic

[2] Eotvos Lorand Univ, Fac Sci, Dept Mat Phys, H-1117 Budapest, Hungary

[3] Max Planck Inst Intelligent Syst, Dept Phase Transformat Thermodynam & Kinet, D-70569 Stuttgart, Germany

[4] Los Alamos Natl Lab, Lujan Neutron Scattering Ctr, Los Alamos, NM 87545 USA

[5] Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic

[6] Togliatti State Univ, Lab Phys Strength Mat & Intelligent Diagnost Syst, Tolyatti 445667, Russia

[7] Univ Virginia, Sch Engn & Appl Sci, Charlottesville, VA 22904 USA

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2015年 / 72卷

基金：

匈牙利科学研究基金会;

关键词：

Twinning; Polycrystalline material; Crystal plasticity; Nondestructive evaluation; STRAIN-HARDENING BEHAVIOR; SITU NEUTRON-DIFFRACTION; NON-CUBIC MATERIALS; ACOUSTIC-EMISSION; MG-ALLOY; PLASTIC-DEFORMATION; STRESS-RELAXATION; SINGLE-CRYSTALS; PURE MAGNESIUM; NONBASAL SLIP;

D O I：

10.1016/j.ijplas.2015.05.009

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A detailed analysis of the loading mode dependence of the deformation mechanisms in randomly textured cast magnesium is presented. An elasto-plastic self-consistent model (EPSC) is used to model the dislocation slip and twinning activity, respectively. The results are quantitatively compared with experimental data obtained by in-situ neutron diffraction (ND) and acoustic emission (AE). Both EPSC calculations and ND line profile analysis show an increased activity of prismatic slip with increasing strain and a loading mode dependence of the activation of the second-order pyramidal slip. The AE measurements and the modeling indicate a difference in the number of nucleated twin variants and the twinned volume in tension and compression. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：127 / 150

页数：24

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