Effects of quench aging treatment on microstructure and tensile properties of thixoformed ZA27 alloy

doi:10.1179/174328407X168775

	Effects of quench aging treatment on microstructure and tensile properties of thixoformed ZA27 alloy
	Chen, T.-J.; Hao, Y.; Li, Y.-D.
刊名	MATERIALS SCIENCE AND TECHNOLOGY
	2007-05
卷号	23 期号:5 页码:535-541
关键词	thixoforming ZA27 alloy quench aging treatment microstructure tensile properties
ISSN号	0267-0836
DOI	10.1179/174328407X168775
英文摘要	The effects of quench aging heat treatment on microstructure and tensile properties of thixoformed ZA27 alloy were investigated. The results indicated that the microstructure of the alloy became into polygonal beta phase particles after solid solution treatment at 350 degrees C for 48 h. The beta particles then decomposed into alpha and eta phases which would coarsen during the subsequent aging at 150 degrees C. It was observed that the Zn concentration in the beta phase near the polygonal boundaries was higher than that within the beta particles. As a consequence, both the decomposition speed of the former beta phase and the subsequent coarsening speed were faster than those of the latter beta phase. Thus, alpha and eta phases near the boundaries were always coarser than those within the particles during aging. Owing to the coarsening, the ultimate tensile strength continuously decreased with increasing aging time. The percentage elongation increased up to 10 h, but decreased with aging time owing to bad deformation accommodation and low bonding strength between particles. Cracks initiated from some defects ( e. g. inclusions and porosities) during tensile test, and the path for the cracks to propagation changed with the aging time.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MANEY PUBLISHING
WOS记录号	WOS:000247156700005
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35602]
专题	材料科学与工程学院
通讯作者	Chen, T.-J.
作者单位	Lanzhou Univ Technol, Key Lab Gansu New Nonferrous Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Chen, T.-J.,Hao, Y.,Li, Y.-D.. Effects of quench aging treatment on microstructure and tensile properties of thixoformed ZA27 alloy[J]. MATERIALS SCIENCE AND TECHNOLOGY,2007,23(5):535-541.
APA	Chen, T.-J.,Hao, Y.,&Li, Y.-D..(2007).Effects of quench aging treatment on microstructure and tensile properties of thixoformed ZA27 alloy.MATERIALS SCIENCE AND TECHNOLOGY,23(5),535-541.
MLA	Chen, T.-J.,et al."Effects of quench aging treatment on microstructure and tensile properties of thixoformed ZA27 alloy".MATERIALS SCIENCE AND TECHNOLOGY 23.5(2007):535-541.