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	Cavity evolution behavior of twin-roll-cast AZ31 alloy sheet during hot deformation
	Lu Zhi-wen ; Peng Wei-ping ; Li Pei-jie ; Lei Li-ping
	2010-10-12 ; 2010-10-12
关键词	Experimental/ casting diffusion fatigue testing fracture grain boundaries magnesium alloys nucleation plastic deformation rolling scanning electron microscopy sheet materials voids (solid)/ twin-roll-cast AZ31 alloy sheet hot deformation SEM fatigue testing machine graphical analysis software trigrain boundary fracture cavity growth mechanisms diffusion elongation plasticity deformation MgJkJk/ A6170Q Inclusions and voids A8120G Preparation of metals and alloys (compacts, pseudoalloys) A6170N Grain and twin boundaries A6220M Fatigue, brittleness, fracture, and cracks A8140N Fatigue, embrittlement, and fracture A6630F Self-diffusion in solid metals, semimetals, and alloys A8140L Deformation, plasticity and creep A6220F Deformation and plasticity A8170 Materials testing/ Mg/ss
中文摘要	The cavity evolution behavior of twin-roll-cast AZ31 magnesium alloy sheet during hot deformation was investigated by in-situ SEM observation on the fatigue testing machine, and the characteristics of cavity were quantitative measured using graphical analysis software. The results show that the cavity nucleates while the twin-roll-cast AZ31 alloy sheet deforms, and the cavity starts on the tri-grain boundary. The continuously growth and coalescence of the cavities induce the material fracture. The cavities grow directionally and prefer to grow along axis perpendicular to the loading axis. The comparison between the theory analysis and experimental results shows that the shape of the cavity with diameter less than 2 mu m is nearly spherical, and the main cavity growth mechanisms is diffusion. In contrast, the cavities with diameter larger than 2 mu m tend to be elongated with the long axis parallel to the loading axis, the main cavity growth mechanisms is plasticity deformation.
语种	中文
出版者	Central South University of Technology ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80572]
专题	清华大学
推荐引用方式 GB/T 7714	Lu Zhi-wen,Peng Wei-ping,Li Pei-jie,et al. Cavity evolution behavior of twin-roll-cast AZ31 alloy sheet during hot deformation[J],2010, 2010.
APA	Lu Zhi-wen,Peng Wei-ping,Li Pei-jie,&Lei Li-ping.(2010).Cavity evolution behavior of twin-roll-cast AZ31 alloy sheet during hot deformation..
MLA	Lu Zhi-wen,et al."Cavity evolution behavior of twin-roll-cast AZ31 alloy sheet during hot deformation".(2010).

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