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The influence of defect and temperature on the fatigue behaviours of Al-Si-Cu-Mg-Ni alloy
Liu, Haiquan; Pang, Jianchao; Wang, Meng; Li, Jianping; Guo, Yongchun; Li, Shouxin; Zhang, Zhefeng
2019-10-01
Source PublicationFATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
ISSN8756-758X
Volume42Issue:10Pages:2372-2382
AbstractHigh-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.
KeywordAl-Si-Cu-Mg-Ni alloys casting defects fatigue damage high temperature high-cycle fatigue
Indexed BySCI
Language英语
WOS IDWOS:000476321400001
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80905
Collection中国科学院金属研究所
Recommended Citation
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,2019,42(10):2372-2382.
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,42(10),2372-2382.
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 42.10(2019):2372-2382.
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