The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging

doi:10.1016/j.msea.2019.138886

IMR OpenIR

	The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging
	Huang, Y. S.; Wang, X. G.; Cui, C. Y.; Li, J. G.; Ye, L. H.; Hou, G. C.; Yang, Y. H.; Liu, J. L.; Liu, J. D.; Zhou, Y. Z.; Sun, X. F.
	2020-01-31
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷号	773
摘要	The correlation between the coarsening of gamma' precipitate and creep properties during long-term aging at 1000 degrees C for 100-1000 h of a fourth-generation nickel-based single crystal superalloy was investigated. The average size of gamma' precipitate increased with the extension of aging time and the morphology of gamma' precipitate kept cuboidal shape after 1000 h. Experimental observation on the coarsening of gamma' phase demonstrated that the relationship between r(t)(3) - r(0)(3) and t was in accordance with the LSW theory and the coarsening rate k was about 5954 nm(3)/h. The creep life of aged samples at 1140 degrees C/137 MPa increased firstly and then decreased with the exposure time prolonging. The casting pores and creep pores were observed on the fracture surface of samples after creep rupture. Compared with the creep pores, the microcracks formed at the edge of casting pores had greater effect on the creep life. The creep properties of samples during aging were mostly affected by the size of gamma' phase. The promotion of creep life of aged sample was rationalized by the slightly grown gamma' phase, the diffusion of the refractory elements and the accumulation of dislocations in the gamma channel. The decrease of creep life was predominantly affected by the seriously coarsened gamma' phase because the significant increase of the size of gamma' phase leaded to a decrease in the resistance of dislocation movement.
DOI	10.1016/j.msea.2019.138886
WOS记录号	WOS:000513985200031
引用统计	被引频次：48[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/321006/155723
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Huang, Y. S.,Wang, X. G.,Cui, C. Y.,et al. The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,773.
APA	Huang, Y. S..,Wang, X. G..,Cui, C. Y..,Li, J. G..,Ye, L. H..,...&Sun, X. F..(2020).The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,773.
MLA	Huang, Y. S.,et al."The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 773(2020).