Compressive creep behavior of TiC/AZ91D magnesium-matrix composites with interpenetrating networks

IMR OpenIR

	Compressive creep behavior of TiC/AZ91D magnesium-matrix composites with interpenetrating networks
	Chen, Liqing ; Guo, Jinhua ; Yu, Baohai ; Ma, Zongyi
通讯作者	Chen, Liqing(lqchen@mail.neu.edu.cn)
	2007-03-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	23 期号:2 页码:207-212
摘要	The 42.1 vol. pct TiC/AZ91D magnesium-matrix composites with interpenetrating networks were fabricated by in-situ reactive infiltration process. The compressive creep behavior of as-synthesized composites was investigated at temperature ranging from 673 to 723 K under loads of 95-108 MPa. For a comparative purpose, the creep behavior of the monolithic matrix alloy AZ91D was also conducted under loads of 15-55 MPa at 548-598 K. The creep mechanisms we're theoretically analyzed based on the power-law relation. The results showed that the creep rates of both TiC/AZ91D composites and AZ91D alloy increase with increasing the temperature and load. The TiC/AZ91D composites possess superior creep resistance as compared with the AZ91D alloy. At deformation temperature below 573 K, the stress exponent n of AZ91D alloy approaches theoretical value of 5, which suggests that the creep process is controlled by dislocation climb. At 598 K, the stress exponent of AZ91D is close to 3, in which viscous non-basal slip deformation plays a key role in the process of creep deformation. However, the case differs from that of AZ91D alloy when the stress exponent n of TiC/AZ91D composites exceeds 9, which shows that there exists threshold stress in the creep process of the composites, similar to other types of composites. The average activation energies for the creep of the AZ91D alloy and TiC/AZ91D composites were calculated to be 144 and 152 kJ/mol, respectively. The existence of threshold stress in the creep process of the composites leads to an increase in activation energy for creep.
关键词	magnesium-matrix composites TiC/AZ91D interpenetrating networks in-situ reactive infiltration creep
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000245602100009
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：9[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/321006/91369
专题	中国科学院金属研究所
通讯作者	Chen, Liqing
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110004, Peoples R China 2.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Liqing,Guo, Jinhua,Yu, Baohai,et al. Compressive creep behavior of TiC/AZ91D magnesium-matrix composites with interpenetrating networks[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2007,23(2):207-212.
APA	Chen, Liqing,Guo, Jinhua,Yu, Baohai,&Ma, Zongyi.(2007).Compressive creep behavior of TiC/AZ91D magnesium-matrix composites with interpenetrating networks.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,23(2),207-212.
MLA	Chen, Liqing,et al."Compressive creep behavior of TiC/AZ91D magnesium-matrix composites with interpenetrating networks".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 23.2(2007):207-212.