Notch sensitivity of two materials including TiAl alloys and K418 alloys

CORC > 兰州理工大学 > 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

	Notch sensitivity of two materials including TiAl alloys and K418 alloys
	Cao, R.1,2; Liu, H. J.1,2; Zhang, J.3; Chen, J. H.1,2
	2011
关键词	TiAl alloys K418 alloys Notch sensitivity Notch strength Fracture
页码	251-264
英文摘要	The tensile sensitivity of notch specimens has been investigated for TiAl alloys and K418 alloys. The notch strength has been quantitatively analyzed. Fracture surfaces of series specimens are also observed and analyzed by scanning electron microscopy (JEOL-6700F). By comparison with series results of notch rod tensile specimens and the special notch rod tensile specimens, it can be found that: Ductile fracture (tear ridge) and dendriage fracture dominate fracture surface of K418 alloys, however, quasi-cleavage fracture including interlamellar fracture and translamellar fracture dominate fracture surface of TiAl alloys. The basic nature of two materials are different, and the driving force of fracture and fracture criteria are also different for brittle TiAl alloys and ductile K418 alloys. For K418 alloys, the final fracture of specimens is controlled by strain not by stress, no notch sensitivity is existed in K418 alloys. However, for TiAl alloys, the final fracture of specimens is controlled by stress, smaller notch sensitivity is existed in TiAl alloys. For special notch rod tensile specimens, no notch sensitivity still appear for K418 alloys. However, for TiAl alloys, when notch depth reaches 10% of specimen diameters, tensile strength decrease. When notch depth reaches 20% of specimen diameters, tensile strength sharply decrease, these parameters are regarded as a important parameter estimating notch depth or depth of casting defect.
会议录	STRUCTURAL INTEGRITY IN NUCLEAR ENGINEERING
会议录出版者	EAST CHINA UNIV SCIENCE AND TECHNOLOGY PRESS
会议录出版地	MEILONG RD, SHANGHAI 200237, PEOPLES R CHINA
语种	英语
资助项目	National Nature Science Foundation of China[50905081] ; National Nature Science Foundation of China[50471109]
WOS研究方向	Nuclear Science & Technology
WOS记录号	WOS:000393735900042
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/37575]
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, Minist Educ, Key Lab Nonferrous Met Alloys, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China 3.Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Cao, R.,Liu, H. J.,Zhang, J.,et al. Notch sensitivity of two materials including TiAl alloys and K418 alloys[C]. 见:.