Investigation on the fracture behavior of shape memory alloy NiTi

doi:10.1007/s11661-005-0288-8

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	Investigation on the fracture behavior of shape memory alloy NiTi
	Chen, J.H.; Sun, W.; Wang, G.Z.
刊名	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
	2005-04-01
卷号	36 期号:4 页码:941-955
关键词	Crack initiation Crack propagation Ductility Elasticity Fracture Mechanical testing Metallographic microstructure Scanning electron microscopy Shape memory effect Stresses Tensile properties Thermal effects Fracture behavior Quasi-cleavage mode Superelasticity Tensile fracture
ISSN号	10735623
DOI	10.1007/s11661-005-0288-8
英文摘要	This work investigates the fracture behavior of shape memory alloy NiTi (50.7 at. pct Ni) at room temperature. Macroscopic mechanical tests, microscopic in situ observations of tensile fracture processes by scanning electron microscopy (SEM), and detailed analyses of fracture surfaces were carried out. The results reveal that specimens with different thicknesses show various shape memory effects and superelasticities. The main crack with a quasi-cleavage mode that combines cleavage with ductile tearing is initiated at the notch tip and is stress-control-propagated in line with the direction of the maximum normal stress. The microstructure has little effect on the direction of crack propagation, but coarser substructures show lower resistance to the crack propagation. In specimens with various types of notches, various notch acuities present different effects on the crack initiation and propagation and result in different fracture behaviors.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Minerals, Metals and Materials Society
WOS记录号	WOS:000227914900006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112259]
专题	兰州理工大学
作者单位	Key State Lab. New Mat. Non-Ferrous, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
推荐引用方式 GB/T 7714	Chen, J.H.,Sun, W.,Wang, G.Z.. Investigation on the fracture behavior of shape memory alloy NiTi[J]. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,2005,36(4):941-955.
APA	Chen, J.H.,Sun, W.,&Wang, G.Z..(2005).Investigation on the fracture behavior of shape memory alloy NiTi.Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,36(4),941-955.
MLA	Chen, J.H.,et al."Investigation on the fracture behavior of shape memory alloy NiTi".Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 36.4(2005):941-955.