Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit

doi:10.1016/j.scriptamat.2024.116399

IMR OpenIR

	Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit
	Tao, Xipeng; Wang, Xinguang; Li, Jinguo; Sun, Xiaofeng; Zhou, Yizhou
通讯作者	Tao, Xipeng(xptao19b@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
	2025-01-15
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	255 页码:7
摘要	Generally, with a large lattice misfit, dislocations tend to move smoothly via cross-slip in gamma channels, and rapidly reorient themselves from the (110 ) to (100 ) direction on the surface of gamma ' ' cuboids to form complete networks in single-crystal superalloys. However, in this study, dense and complete dislocation networks also formed in a single-crystal superalloy with a small gamma/gamma ' ' lattice misfit during high-temperature creep deformation. The abnormal densification of dislocation networks was proven to be related to the anomalous enrichment of W and Ta in gamma ' ' phases during the secondary creep stage. Microstructural analysis suggested that anomalous enrichment contributed to an elevated antiphase boundary energy (APBE) of gamma ' ' phases and led to more vacancies within the gamma phase, promoting dislocation climb. The higher APBE of gamma ' ' phases impeded dislocations from cutting into gamma ' ' phases, providing enough time for interfacial dislocations to climb through vacancies and rotate to form dense dislocation networks.
关键词	Abnormal densification Dislocation networks Creep deformation Single crystal superalloy gamma / gamma ' lattice misfit
资助者	National Key Research and Devel-opment Program of China ; Excellent Youth Foundation of Liaoning Province ; Science Center for Gas Turbine Project
DOI	10.1016/j.scriptamat.2024.116399
收录类别	SCI
语种	英语
资助项目	National Key Research and Devel-opment Program of China[2017YFA0700704] ; Excellent Youth Foundation of Liaoning Province[2021-YQ-02] ; Science Center for Gas Turbine Project[P2021-A-IV--002-002]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001327654900001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：1[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/321006/190378
专题	中国科学院金属研究所
通讯作者	Tao, Xipeng; Zhou, Yizhou
作者单位	Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Tao, Xipeng,Wang, Xinguang,Li, Jinguo,等. Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit[J]. SCRIPTA MATERIALIA,2025,255:7.
APA	Tao, Xipeng,Wang, Xinguang,Li, Jinguo,Sun, Xiaofeng,&Zhou, Yizhou.(2025).Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit.SCRIPTA MATERIALIA,255,7.
MLA	Tao, Xipeng,et al."Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ / γ ′ lattice misfit".SCRIPTA MATERIALIA 255(2025):7.