Compression fracture behaviors of TiAl intermetallics based alloys

doi:10.3901/JME.2011.06.039

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	Compression fracture behaviors of TiAl intermetallics based alloys
	R., Cao ; L., Li ; J., Zhang ; H., He ; J., Chen
刊名	Jixie Gongcheng Xuebao/Journal of Mechanical Engineering
	2011-03-20
卷号	47 期号:6 页码:39-44+50
关键词	Aluminum alloys Binary alloys Compression testing Fracture Fracture mechanics Fracture testing Intermetallics Metal testing Shear stress Tensile strength Tensile testing Titanium alloys Unloading Cleavage fracture Compression fracture Controlling parameters Fracture mechanisms Fracture surfaces Longitudinal cracking Tensile fractures Ti-al intermetallics
ISSN号	05776686
DOI	10.3901/JME.2011.06.039
英文摘要	Based on the results of preloading-unloading and preloading-unloading-reloading compression testing, observations of corresponding cracks and fracture surfaces for TiAl intermetallics based-alloys, compression fracture behaviors are studied in detail. The results show that the compression preloading has no influence on the compression fracture behavior, but has effect on the subsequent tensile fracture behavior, i. e. drastically reducing the tensile fracture stress. For both fully lamellar (FL) and duplex (DP) specimens the shear cracking first starts from the top or/and the bottom surface. In the compression testing, the shear stresses at the top or/and the bottom surfaces are the controlling parameters. The final fracture is induced by the shear cracks produced at the top and bottom surfaces and expanding to the center of specimen and mutually connected. The causes of the longitudinal cracking are different for DP and FL alloys. The much lower values of the σb measured in tensile tests are attributed to the difference of the fracture mechanisms between the tensile test and the compression tests of the TiAl alloy. For the tensile test the fracture mechanism is the cleavage fracture caused by the tensile normal stress, while for the compression test it is controlled by the shear cracking. © 2011 Journal of Mechanical Engineering.
语种	中文
出版者	Editorial Office of Chinese Journal of Mechanical Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111951]
专题	兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.China North Engine Research Institute, Datong 037036, China 2.High Temperature Materials Division, China Iron and Steel Research Institute Group, Beijing 100081, China; 3.Xi'an Dorset Metal Materials Development Co., Ltd, Xi'an 710021, China; 4.State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
推荐引用方式 GB/T 7714	R., Cao,L., Li,J., Zhang,et al. Compression fracture behaviors of TiAl intermetallics based alloys[J]. Jixie Gongcheng Xuebao/Journal of Mechanical Engineering,2011,47(6):39-44+50.
APA	R., Cao,L., Li,J., Zhang,H., He,&J., Chen.(2011).Compression fracture behaviors of TiAl intermetallics based alloys.Jixie Gongcheng Xuebao/Journal of Mechanical Engineering,47(6),39-44+50.
MLA	R., Cao,et al."Compression fracture behaviors of TiAl intermetallics based alloys".Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 47.6(2011):39-44+50.