Effect of corrosion attack on the fatigue behavior of an as-cast Mg-7%Gd-5%Y-1%Nd-0.5%Zr alloy

IMR OpenIR

	Effect of corrosion attack on the fatigue behavior of an as-cast Mg-7%Gd-5%Y-1%Nd-0.5%Zr alloy
	Wang, S. D.; Xu, D. K.; Wang, B. J.; Han, E. H.; Dong, C.; dkxu@imr.ac.cn
	2015
发表期刊	MATERIALS & DESIGN
ISSN	0261-3069
卷号	84 页码:185-193
摘要	Through investigating and comparing the fatigue behavior of an as-cast Mg-7%Gd-5%Y-1%Nd-0.5%Zr alloy in both laboratory air and 3.5 wt.% NaCl solution, the effect of corrosion attack on fatigue crack initiation has been disclosed. The S-N curves showed that the fatigue strength in air was 120 MPa and not sensitive to the loading frequency, whereas the fatigue strength in NaCl solution decreased from 80 MPa to 60 MPa with the loading frequency decreasing from 20 Hz to 5 Hz. Observations to fracture surfaces demonstrated that in air, fatigue cracks preferentially initiated at the oxide inclusions. However, the fatigue crack initiation in NaCl solution was associated with corrosion pits. Moreover, multiple fatigue cracks initiated at pits on fracture surfaces of corrosion fatigue failed samples when the loading frequency decreased to 5 Hz. Based on the measured "defect area" of oxide inclusions, the predicted fatigue strength in air could be well fitted with the experimental data. However, due to the occurrence of hydrogen embrittlement and crack initiation at multiple sites, the fatigue strength of samples tested in NaCl solution cannot be predicted.
部门归属	[wang, s. d. ; dong, c.] dalian univ technol, sch mat sci & engn, lab mat modificat laser electron & ion beams, dalian 116024, peoples r china ; [wang, s. d. ; xu, d. k. ; wang, b. j. ; han, e. h.] chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china
关键词	Mg Alloy Corrosion Cyclic Loading Fatigue Crack Initiation Fatigue Behavior
资助者	National Natural Science Foundation of China projects [51271183, 51171192, 51301172]; National Basic Research Program of China (973 Program); Innovation Fund of Institute of Metal Research (IMR), Chinese Academy of Science (CAS) [2013CB632205]
收录类别	sci
语种	英语
WOS记录号	WOS:000361147600044
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74742
专题	中国科学院金属研究所
通讯作者	dkxu@imr.ac.cn
推荐引用方式 GB/T 7714	Wang, S. D.,Xu, D. K.,Wang, B. J.,et al. Effect of corrosion attack on the fatigue behavior of an as-cast Mg-7%Gd-5%Y-1%Nd-0.5%Zr alloy[J]. MATERIALS & DESIGN,2015,84:185-193.
APA	Wang, S. D.,Xu, D. K.,Wang, B. J.,Han, E. H.,Dong, C.,&dkxu@imr.ac.cn.(2015).Effect of corrosion attack on the fatigue behavior of an as-cast Mg-7%Gd-5%Y-1%Nd-0.5%Zr alloy.MATERIALS & DESIGN,84,185-193.
MLA	Wang, S. D.,et al."Effect of corrosion attack on the fatigue behavior of an as-cast Mg-7%Gd-5%Y-1%Nd-0.5%Zr alloy".MATERIALS & DESIGN 84(2015):185-193.