The influence of defect and temperature on the fatigue behaviours of Al-Si-Cu-Mg-Ni alloy

doi:10.1111/ffe.13099

CORC > 金属研究所 > 中国科学院金属研究所

	The influence of defect and temperature on the fatigue behaviours of Al-Si-Cu-Mg-Ni alloy
	Liu, Haiquan 1,2; Pang, Jianchao 2; Wang, Meng 1,2; Li, Jianping 3; Guo, Yongchun 3; Li, Shouxin 2; Zhang, Zhefeng 1,2
刊名	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
	2019-07-15
页码	11
关键词	Al-Si-Cu-Mg-Ni alloys casting defects fatigue damage high temperature high-cycle fatigue
ISSN号	8756-758X
DOI	10.1111/ffe.13099
通讯作者	Pang, Jianchao(jcpang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
英文摘要	High-cycle fatigue (HCF) properties of two Al-Si-Cu-Mg-Ni alloys with different defect sizes named as alloys A (smaller ones) and B (bigger ones) were investigated at 350 degrees C and 425 degrees C, respectively. The results indicate that fatigue strengths of both alloys decrease as the temperature increases. Fatigue cracks originated from pores and oxide films at both temperatures. They propagated preferentially through cracked matrix at 350 degrees C and debonded interface and grain boundary at 425 degrees C. Alloy A exhibits higher fatigue life and fatigue strength than alloy B at 350 degrees C due to its smaller pore sizes. However, it has slightly worse fatigue properties than alloy B at 425 degrees C because the fatigue crack initiation is controlled by oxide film at this temperature and is not affected by its size. This indicates that there is a transition of predominant initiation site from pores to oxide films when the temperature increases. The fatigue strength estimated through defect size is consistent with the experimental results at 350 degrees C, while unsuitable at 425 degrees C.
资助项目	National Natural Science Foundation of China (NSFC)[51331007] ; National Natural Science Foundation of China (NSFC)[51871224]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	WILEY
WOS记录号	WOS:000476321400001
资助机构	National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/134798]
专题	金属研究所_中国科学院金属研究所
通讯作者	Pang, Jianchao; Zhang, Zhefeng
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Mat Fatigue & Fracture Lab, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Xian Technol Univ, Sch Mat & Chem Engn, Xian 710021, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Liu, Haiquan,Pang, Jianchao,Wang, Meng,et al. The influence of defect and temperature on the fatigue behaviours of Al-Si-Cu-Mg-Ni alloy[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2019:11.
APA	Liu, Haiquan.,Pang, Jianchao.,Wang, Meng.,Li, Jianping.,Guo, Yongchun.,...&Zhang, Zhefeng.(2019).The influence of defect and temperature on the fatigue behaviours of Al-Si-Cu-Mg-Ni alloy.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,11.
MLA	Liu, Haiquan,et al."The influence of defect and temperature on the fatigue behaviours of Al-Si-Cu-Mg-Ni alloy".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES (2019):11.