Distinguishing between slip and twinning events during nanoindentation of magnesium alloy AZ31

被引：37

作者：

Guo, Tingting ^{[1
]}

Siska, Filip ^{[2
]}

Barnett, M. R. ^{[1
]}

机构：

[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia

[2] Acad Sci Czech Republ, Inst Phys Met, CS-61662 Brno, Czech Republic

来源：

SCRIPTA MATERIALIA | 2016年 / 110卷

关键词：

Magnesium alloy; Nanoindentation; AFM; CPFEM; DEFORMATION MECHANISMS; ORIENTATION DEPENDENCE; DISLOCATION NUCLEATION; INCIPIENT PLASTICITY; NEUTRON-DIFFRACTION; INDENTATION SIZE; SINGLE-CRYSTALS; POP-IN; BEHAVIOR; MG;

D O I：

10.1016/j.scriptamat.2015.07.034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanoindentation was performed in selected grain orientations close to [1 1 (2) over bar 0] and [1 0 (1) over bar 0] in magnesium alloy Mg-3Al-1Zn. The atomic force microscopy (AFM) and electron backscatter diffraction (EBSD) were used to examine the nanoindentation imprint. Two critical events, yielding and pop-in were observed in the depth-load curves. Slip trace analysis suggests that basal slip is responsible for yielding. The following pop-in events at higher loads are associated with the appearance {1 0 (1) over bar 2} twins on the surface. The critical resolved shear stress (CRSS) was estimated to be in the range of 220-400 MPa for the initiation of basal slip. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：10 / 13

页数：4

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