Evolution of micro-pores in a single crystal nickel-based superalloy during 980 °C creep

IMR OpenIR

	Evolution of micro-pores in a single crystal nickel-based superalloy during 980 °C creep
	He Yufeng; Wang Shaogang; Shen Jian; Wang Dong; Lu Yuzhang; Lou Langhong; Zhang Jian
	2022
发表期刊	ACTA METALLURGICA SINICA(ENGLISH LETTERS)
ISSN	1006-7191
卷号	35 期号:8 页码:1397-1406
摘要	The evolution of micro-pores in a single crystal nickel-based superalloy during creep at 980 °C/220 MPa was investigated by X-ray computed tomography. Time-dependent ex-situ 3D information including the number, volume fraction, distribution and morphology of micro-pores was analyzed. The results reveal that the significant formation and growth of micro-pores occur at the end of secondary/beginning of tertiary creep stage. The irregular large pores as well as high density pores located at strain concentration region are the major detrimental factors facilitating the creep damage. Creep failure is resulted from the connection of surface cracks induced by oxidation, and the internal cracks generated from growth and merging of micro-pores.
关键词	Single crystal superalloy Creep damage Micro-pore evolution X-ray tomography
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179638
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	He Yufeng,Wang Shaogang,Shen Jian,et al. Evolution of micro-pores in a single crystal nickel-based superalloy during 980 °C creep[J]. ACTA METALLURGICA SINICA(ENGLISH LETTERS),2022,35(8):1397-1406.
APA	He Yufeng.,Wang Shaogang.,Shen Jian.,Wang Dong.,Lu Yuzhang.,...&Zhang Jian.(2022).Evolution of micro-pores in a single crystal nickel-based superalloy during 980 °C creep.ACTA METALLURGICA SINICA(ENGLISH LETTERS),35(8),1397-1406.
MLA	He Yufeng,et al."Evolution of micro-pores in a single crystal nickel-based superalloy during 980 °C creep".ACTA METALLURGICA SINICA(ENGLISH LETTERS) 35.8(2022):1397-1406.