EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY

doi:10.11900/0412.1961.2015.00333

IMR OpenIR

	EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY
	Wang Wenhui 1,2; Wu Di 1; Chen Rongshi 1; Lou Changsheng 2
通讯作者	Wu Di(dwu@imr.ac.cn)
	2016-05-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	52 期号:5 页码:567-574
摘要	Among the traditional cast magnesium alloys system, Mg-3Nd-1Zn alloy with high strength and heat resistance, has been widely applied in aeronautics such as in engine box and wing rib of airplane. In present research, the as-cast Mg-2.7Nd-0.6Zn-0.5Zr (NZ31) alloy was solution treated and then aged at temperatures ranging from 200 degrees C to 300 degrees C. The microstructures and mechanical properties of the aged specimens especially at relatively high temperature (225 similar to 300 degrees C) were systematically characterized by OM, SEM and TEM. A new kind of precipitates distributed in line was clearly found in the specimens aged at high temperature (225 similar to 275 degrees C) for a short time (15 similar to 30 min), which corresponded to a significant enhancement of hardness and tensile strength at room temperature. The TEM results showed that the precipitates distributed in line had a composition of Mg12Nd and a granular shape, and mainly formed along the (0001)(Mg) basal plane. The special distribution of the granular Mg12Nd precipitates was effective barriers to the basal slips and may probably restrain the intergranular coordination during tensile deformation, leading to a large strengthening effect, that is, the yield strength and ultimate tensile strength, of the NZ31 alloy aged at 250 similar to 275 degrees C for 20 similar to 30 min, increased by about 70% and 29% respectively, in comparison with only the solutionized one.
关键词	magnesium alloy ageing treatment precipitate mechanical property
DOI	10.11900/0412.1961.2015.00333
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000376471100007
出版者	SCIENCE PRESS
引用统计	被引频次：1[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/321006/122251
专题	中国科学院金属研究所
通讯作者	Wu Di
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China
推荐引用方式 GB/T 7714	Wang Wenhui,Wu Di,Chen Rongshi,et al. EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY[J]. ACTA METALLURGICA SINICA,2016,52(5):567-574.
APA	Wang Wenhui,Wu Di,Chen Rongshi,&Lou Changsheng.(2016).EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY.ACTA METALLURGICA SINICA,52(5),567-574.
MLA	Wang Wenhui,et al."EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY".ACTA METALLURGICA SINICA 52.5(2016):567-574.