Toughening Mechanisms of Lamellar TiAl Alloys Containing B2 Phase at Room Temperature

doi:10.1016/S1875-5372(14)60072-2

	Toughening Mechanisms of Lamellar TiAl Alloys Containing B2 Phase at Room Temperature
	Wang Zhe 1,2; Cao Rui1,2 ; Chen Jianhong1,2 ; Zhang Ji 3
	2014-03-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	43 期号:3 页码:540-543
摘要	Three point bending (3PB) fracture tests and unload tests of lamellar TiAl alloys containing B2 phase were carried out to investigate the toughening mechanisms of the TiAl alloy. Double notched 4PB tests were used to evaluate the critical event of cleavage fracture of this alloy. To observe the morphology of fracture surface and crack path, scantling electron microscope (SEM) and energy spectrum analyses were also carried out. The results reveal the following aspects: (1) The load-displacement curve of 3PB fracture tests presents linear elastic relationship, and B2 phase has no effect on the crack initiation. (2) B2 phase is an obstacle to the crack propagation. The crack is arrested by B2 phase at low applied load and bypasses the B2 phase by skipping over B2 phase or crosses B2 phase at high applied load. (3) The critical event of the cleavage fracture of a notched specimen is a propagation of the nucleated interlamellar crack at the notch root. And trans-lamellar propagation is the key factor affecting the whole process of cleavage fracture. (4) The toughening mechanisms of the current alloy include B2 phase toughening, crack deflection, shear ligament toughening and trans-lamellar toughening.
关键词	TiAl alloys toughening mechanisms fracture toughness B2 phase
DOI	10.1016/S1875-5372(14)60072-2
收录类别	SCIE
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000333879500006
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/155519
专题	材料科学与工程学院材料科学与工程学院_特聘教授组
通讯作者	Cao Rui
作者单位	1.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Coll Mat Sci & Engn, Lanzhou 730050, Peoples R China; 3.Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室; 材料科学与工程学院
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室; 材料科学与工程学院
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Wang Zhe,Cao Rui,Chen Jianhong,et al. Toughening Mechanisms of Lamellar TiAl Alloys Containing B2 Phase at Room Temperature[J]. RARE METAL MATERIALS AND ENGINEERING,2014,43(3):540-543.
APA	Wang Zhe,Cao Rui,Chen Jianhong,&Zhang Ji.(2014).Toughening Mechanisms of Lamellar TiAl Alloys Containing B2 Phase at Room Temperature.RARE METAL MATERIALS AND ENGINEERING,43(3),540-543.
MLA	Wang Zhe,et al."Toughening Mechanisms of Lamellar TiAl Alloys Containing B2 Phase at Room Temperature".RARE METAL MATERIALS AND ENGINEERING 43.3(2014):540-543.