Notch Sensitivity and Failure Behavior of TiAl and K418 Alloys

doi:10.1007/s11665-018-3440-5

	Notch Sensitivity and Failure Behavior of TiAl and K418 Alloys
	Cao, R.1,2 ; Wen, J. X.1,2; Liu, H. J.1; Chen, J. H.1,2
	2018-07
发表期刊	JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
ISSN	1059-9495
卷号	27 期号:7 页码:3374-3385
摘要	The notch sensitivity of tensile specimens of TiAl and K418 alloys has been investigated, and the notch strength has been quantitatively analyzed. The fracture surface of the specimens has also been observed and analyzed by scanning electron microscopy (JEOL-6700F). By comparing notch rod tensile specimens and special notch rod tensile specimens, it was found that the basic nature, fracture driving force, and fracture criteria of the brittle TiAl alloy and the ductile K418 alloy are different. The final fracture of the K418 alloy is controlled by strain and not by stress, and the specimens do not exhibit notch sensitivity. However, the final fracture of the TiAl alloy is controlled by stress, and the specimens exhibit small notch sensitivity. For the special notch rod tensile specimens, the K418 specimens do not exhibit notch sensitivity. However, for the TiAl alloy, when the notch depth reaches 10% of the specimen diameter, the tensile strength decreases, and when the notch depth reaches 20% of the specimen diameters, the tensile strength sharply decreases.
关键词	fracture K418 alloys notch sensitivity notch strength TiAl alloys
DOI	10.1007/s11665-018-3440-5
收录类别	SCI ; SCIE
语种	英语
资助项目	National Nature Science Foundation of China[51761027][51675255] ; Program of Innovation Groups of Basic Research of Gansu Province[17JR5RA107] ; Foundation of Collaborative Innovation Teams in College of Gansu Province[2017C-07]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000439346300017
出版者	SPRINGER
EI入藏号	20182305289879
EI主题词	Tensile strength
EI分类号	541.1 Aluminum - 541.2 Aluminum Alloys - 542.3 Titanium and Alloys - 549.1 Alkali Metals - 951 Materials Science
引用统计	被引频次：3[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/32565
专题	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	Cao, R.
作者单位	1.Lanzhou Univ Technol, Dept Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	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
通讯作者单位	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
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Cao, R.,Wen, J. X.,Liu, H. J.,et al. Notch Sensitivity and Failure Behavior of TiAl and K418 Alloys[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2018,27(7):3374-3385.
APA	Cao, R.,Wen, J. X.,Liu, H. J.,&Chen, J. H..(2018).Notch Sensitivity and Failure Behavior of TiAl and K418 Alloys.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,27(7),3374-3385.
MLA	Cao, R.,et al."Notch Sensitivity and Failure Behavior of TiAl and K418 Alloys".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 27.7(2018):3374-3385.

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