Microstructure evolution and deformation features of AZ31 Mg-alloy during creep

doi:10.1016/j.msea.2005.10.015

IMR OpenIR

	Microstructure evolution and deformation features of AZ31 Mg-alloy during creep
	Tian, SG ; Wang, L ; Sohn, KY ; Kim, KH ; Xu, YB ; Hu, ZQ
通讯作者	Tian, SG(tiansugui2003@163.com)
	2006-01-15
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	415 期号:1-2 页码:309-316
摘要	By means of the measurement of the creep curve and the observation of SEM and transmission electron microscope (TEM), an investigation has been made into the microstructure evolution and deformation features of AZ31 Mg-alloy during high temperature creep. Results show that the deformation features of the alloy in the primary stage of creep are that significant amount of dislocation slips are activated on basal and non-basal planes, then these ones are concentrated into the dislocation cells or walls as creep goes on. At the same time, twinning occurs as an additional deformation mechanism in the role of the compatibility stress. During steady state creep, the dislocation cells are transformed into the subgrains, then, the protrusion and coalition of the sub-boundaries results in the occurrence of dynamic recovery (DRV). After the dynamic recrystallization (DRX), the multiple slips in the grain interiors are considered to be the main deformed mechanism in the later stage of the steady state creep. An obvious feature of creep entering the tertiary stage is that the cracks appear on the locations of the triple junction. As creep continues, the cracks are viscous expanded along the grain boundaries; this is taken for being the fracture mechanism of the alloy crept to failure. The multiple slips in the grain interiors and the cracks expanded viscous along the grain boundary occur in whole of specimens, that, together with the twins and dynamic recrystallization, is responsible for the rapid increase of the strain rate in the later stage during creep. (c) 2005 Elsevier B.V. All rights reserved.
关键词	AZ31 Mg-alloy creep dislocation slip twinning dynamic recrystallization deformation mechanism
DOI	10.1016/j.msea.2005.10.015
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000234270400041
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/88965
专题	中国科学院金属研究所
通讯作者	Tian, SG
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110023, Peoples R China 2.Korea Inst Machinery & Mat, Chang Won 641010, South Korea 3.Chinese Acad Sci, Met Res Inst, State Key Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Tian, SG,Wang, L,Sohn, KY,et al. Microstructure evolution and deformation features of AZ31 Mg-alloy during creep[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2006,415(1-2):309-316.
APA	Tian, SG,Wang, L,Sohn, KY,Kim, KH,Xu, YB,&Hu, ZQ.(2006).Microstructure evolution and deformation features of AZ31 Mg-alloy during creep.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,415(1-2),309-316.
MLA	Tian, SG,et al."Microstructure evolution and deformation features of AZ31 Mg-alloy during creep".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 415.1-2(2006):309-316.