Revealing the effect of Ta on coarsening behavior of γ' phases during thermal exposure at 1000 °C in a Ni-based SX superalloy

doi:10.1016/j.jallcom.2024.176359

IMR OpenIR

	Revealing the effect of Ta on coarsening behavior of γ' phases during thermal exposure at 1000 °C in a Ni-based SX superalloy
	Gao, Yuting 1,2; Cui, Jingping 3; Dong, Jiasheng 1; Lou, Langhong 1
通讯作者	Dong, Jiasheng(djs@imr.ac.cn)
	2025-01-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1010 页码:12
摘要	To reveal the effect of Ta on coarsening behavior of gamma' phases during thermal exposure at 1000 degrees C in a Ni-based single crystal superalloy, morphology and particle size distributions of gamma' phases as well as misfit dislocations in alloys with varying Ta content are investigated by scanning electron microscope, transmission electron microscope, high resolution x-ray diffraction and atom probe tomography techniques. The results demonstrate that Ta addition accelerates the non-directional coarsening of gamma' phases during thermal exposure at 1000 degrees C. This can be attributed to two aspects. For one thing, Ta addition increases absolute lattice misfit at both room temperature and 1000 degrees C, thereby enhancing interfacial elastic energy as driving force for the non-directional coarsening of gamma' phases. Moreover, to release interfacial elastic strain energy, high-density misfit dislocations are formed. However, the misfit dislocations can be served as channels that facilitate the rapid diffusion of elements, which promoting the non-directional coarsening of gamma' phases. For another, Ta addition improves gamma/gamma' two-phase interfacial energy based on A.J. Adelle's approach, so further accelerating the non-directional coarsening of gamma' phases. Besides, the relationship between Ta addition and coarsening mechanism of gamma' phases is further discussed in detail. It is found that the Ta addition advances transition of particle size distributions from being initially controlled by matrix diffusion to being governed by interface diffusion.
关键词	Tantalum Thermal exposure gamma' coarsening behavior Interfacial energy Particle size distribution Ni-based single crystal superalloy
资助者	National Science and Technology Major Project
DOI	10.1016/j.jallcom.2024.176359
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[2017-VI-0019-0091]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001348047100001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191082
专题	中国科学院金属研究所
通讯作者	Dong, Jiasheng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yuting,Cui, Jingping,Dong, Jiasheng,et al. Revealing the effect of Ta on coarsening behavior of γ' phases during thermal exposure at 1000 °C in a Ni-based SX superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2025,1010:12.
APA	Gao, Yuting,Cui, Jingping,Dong, Jiasheng,&Lou, Langhong.(2025).Revealing the effect of Ta on coarsening behavior of γ' phases during thermal exposure at 1000 °C in a Ni-based SX superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,1010,12.
MLA	Gao, Yuting,et al."Revealing the effect of Ta on coarsening behavior of γ' phases during thermal exposure at 1000 °C in a Ni-based SX superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 1010(2025):12.