NDLI: Microstructural evolution of plastic deformation of NiTi shape memory alloy at low temperature

Content Provider	Springer Nature Link
Author	Zhang, Yanqiu Jiang, Shuyong Zhao, Yanan Tang, Ming
Copyright Year	2013
Abstract	Nickel-titanium shape memory alloy (NiTi SMA) which possesses crystal structure of B2 austenite at room temperature was subjected to plastic deformation at low temperature (−150 °C) by means of local canning compression. The microstructural evolution of NiTi SMA at the different deformation degree was investigated by transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). At the deformation degree by 15%, a high density of dislocations occurs in the deformed NiTi sample. At the deformation degree by 25%, the deformed NiTi sample exhibits the martensite morphology due to the pinning of dislocations at the grain boundaries. At the deformation degree by 50%, a small amount of nanocrystalline phase arises in the deformed NiTi sample. At the deformation degree by 80%, severe plastic deformation (SPD) leads to the occurrence of a great deal of amorphous and nanocrystalline phase.
Starting Page	1034
Ending Page	1037
Page Count	4
File Format	PDF
ISSN	10002413
Journal	Journal of Wuhan University of Technology-Mater. Sci. Ed.
Volume Number	28
Issue Number	5
e-ISSN	19930437
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-10-05
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	NiTi alloy severe plastic deformation shape memory alloy amorphization nanocrystallization Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Science

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