Effect of strain rate and temperature on fracture of magnesium alloy AZ31B

被引：80
|
作者：
Rodriguez, A. K. [1 ,2 ]
Ayoub, G. A. [2 ,3 ]
Mansoor, B. [2 ]
Benzerga, A. A. [1 ,4 ,5 ]
机构：
[1] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
[2] Texas A&M Univ Qatar, Dept Mech Engn, Doha 28874, Qatar
[3] Amer Univ Beirut, Dept Mech Engn, Beirut 11702020, Lebanon
[4] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA
[5] Ctr Intelligent Multifunct Mat & Struct, College Stn, TX 77843 USA
来源：
ACTA MATERIALIA | 2016年 / 112卷
关键词：
Mg alloys; Ductile fracture; Twin-sized voids; Second phase particles; Void coalescence; ANISOTROPIC DUCTILE FRACTURE; MG ALLOYS; DEFORMATION MECHANISMS; TENSILE DEFORMATION; PLASTIC ANISOTROPY; CONTRACTION TWINS; PART I; BEHAVIOR; TEXTURE; STRESS;
D O I：
10.1016/j.actamat.2016.03.061
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fracture behavior of twin roll cast AZ31B magnesium has been studied in tension. Explored ranges of temperature and strain rate were wide enough to encompass noticeable transitions in fracture characteristics at both macroscopic and microscopic scales. Overall properties include strain rate sensitivity, thermal softening, strain to failure, failure mode, plastic anisotropy and work of fracture. The micro mechanisms of damage initiation and accumulation were inferred from tests interrupted at incipient macrocrack formation for key test conditions. The competing roles of voids nucleated on aligned inclusion clusters and at presumed contraction double twins are discussed. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：194 / 208
页数：15
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