Fatigue properties and fracture mechanism of Stellite12 cobalt-based alloy

doi:10.11868/j.issn.1001-4381.2020.000076

	Fatigue properties and fracture mechanism of Stellite12 cobalt-based alloy
	Miao, Wen-Juan 2,4; Cao, Rui 2,4; Che, Hong-Yan 1,3; Dong, Hao 1,3; Chen, Jian-Hong 2,4
刊名	Cailiao Gongcheng/Journal of Materials Engineering
	2021-01-20
卷号	49 期号:1 页码:153-159
关键词	Bending dies Bending strength Carbides Cobalt alloys Cracks Fatigue crack propagation Fracture Morphology Surface defects Textures Fatigue fracture process Fatigue properties Fatigue sensitivity Fracture mechanisms Fracture morphology S-N fatigue curves Three-point bending fatigues Transgranular fracture
ISSN号	10014381
DOI	10.11868/j.issn.1001-4381.2020.000076
英文摘要	The three-point bending fatigue method was used to determine the S-N fatigue curves of smooth specimens and straight-notched specimens to study the fatigue properties of Stellite12 cobalt-based alloy, and the fatigue fracture processes of the cobalt-based alloy were investigated by the observation of fracture morphology. The results show that the fatigue limit of the smooth specimen is 545 MPa, which is about 25.4% of the original bending strength of 1552 MPa. The fatigue limit of the straight-notched specimen is about 101 MPa, which is about 19.1% of static bending strength of 517.6 MPa. The fatigue sensitivity of smooth specimens and straight-notched specimens is 397 and 31, respectively. In addition, it is found that the fatigue cracks can initiate in the carbides aggregated regions in the near surface. Surface defects can also induce the initiation of fatigue cracks. The transgranular fracture of the carbides dominates in the crack propagation. The cobalt base metal presents a lot of tearing ridges under the condition of stress ratio R=0.1, but it also shows a certain degree brittle fracture mode, so the fatigue crack propagation mode is a mixed mode of true fatigue and static fatigue. © 2021, Journal of Materials Engineering. All right reserved.
WOS研究方向	Materials Science
语种	中文
出版者	Beijing Institute of Aeronautical Materials (BIAM)
WOS记录号	WOS:000625353900018
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147155]
专题	材料科学与工程学院
作者单位	1.Advanced Technology & Materials Co., Ltd., China Iron & Steel Research Institute Group, Beijing; 100081, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Hebei Province Engineering Research Center for Hot Isostatic Pressing, Zhuozhou; 072750, China 4.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Miao, Wen-Juan,Cao, Rui,Che, Hong-Yan,et al. Fatigue properties and fracture mechanism of Stellite12 cobalt-based alloy[J]. Cailiao Gongcheng/Journal of Materials Engineering,2021,49(1):153-159.
APA	Miao, Wen-Juan,Cao, Rui,Che, Hong-Yan,Dong, Hao,&Chen, Jian-Hong.(2021).Fatigue properties and fracture mechanism of Stellite12 cobalt-based alloy.Cailiao Gongcheng/Journal of Materials Engineering,49(1),153-159.
MLA	Miao, Wen-Juan,et al."Fatigue properties and fracture mechanism of Stellite12 cobalt-based alloy".Cailiao Gongcheng/Journal of Materials Engineering 49.1(2021):153-159.