Dynamic recovery and recrystallization of an as-cast SX superalloy during hot deformation

doi:10.1016/j.jmst.2024.08.031

IMR OpenIR

	Dynamic recovery and recrystallization of an as-cast SX superalloy during hot deformation
	Li, Yihang 1; Jiang, Zhipeng 1; Li, Longfei 1; Xie, Guang 2; Zhang, Jian 2; Feng, Qiang 1
通讯作者	Li, Longfei(lilf@skl.ustb.edu.cn) ; Feng, Qiang(qfeng@skl.ustb.edu.cn)
	2025-05-10
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	217 页码:296-310
摘要	The plastic deformation introduced during the cooling stage (above 10 0 0 degrees C) of directional solidification is one of the primary reasons for the recrystallization of Ni-based single-crystal (SX) turbine blades in aeroengines during subsequent heat treatment. An as-cast SX superalloy DD33 was compressed at 1200 degrees C with a Gleeble thermo-mechanical simulator to mimic such deformation. The microstructural evolution, dynamic recovery, and dynamic recrystallization nucleation of the as-cast SX superalloy during hot deformation are investigated. The results show that the highest stored energy occurs in the vicinity of the eutectics, and its energy in the interdendritic regions is higher than that in the dendrite cores/arms. The formation of deformation bands and related transition bands near the eutectics are the primary characteristics of microstructural evolution during hot deformation. The dynamic recovery in the eutectic regions includes the entanglement and annihilation of dislocations at eutectic/matrix interface, within nearby gamma matrix or within the eutectic gamma' phase, as well as the formation of dense dislocation networks in these sites. Subsequently, the low-angle grain boundaries in the transition bands migrate, merge, and finally transform into high-angle grain boundaries. In other words, the recrystallized grains nucleate near the eutectics via subgrain growth. In contrast, the dislocations only tangle and annihilate at the gamma/gamma' interfaces in other interdendritic regions and the dendrite cores/arms without initiating recrystallization under moderate plastic deformation ( epsilon plastic = 11.9 %). This study will be helpful for understanding the local microstructural evolution of SX superalloys during directional solidification, as well as the recovery and recrystallization nucleation during the subsequent annealing. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Single-crystal superalloy Hot deformation Recovery Recrystallization
资助者	National Key Re-search and Development Program of China ; National Science and Technology Ma-jor Project ; National Natural Science Foundation of China ; Science Center for Gas Turbine Project
DOI	10.1016/j.jmst.2024.08.031
收录类别	SCI
语种	英语
资助项目	National Key Re-search and Development Program of China[2022YFB3707104] ; National Key Re-search and Development Program of China[2022YFB3708100] ; National Science and Technology Ma-jor Project[J2019-VI-0010-0124] ; National Natural Science Foundation of China[52331005] ; National Natural Science Foundation of China[91860201] ; National Natural Science Foundation of China[52271042] ; National Natural Science Foundation of China[52171095] ; Science Center for Gas Turbine Project[P2022-C-IV-0 01-0 01]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001341032100001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：3[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/321006/190895
专题	中国科学院金属研究所
通讯作者	Li, Longfei; Feng, Qiang
作者单位	1.Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Yihang,Jiang, Zhipeng,Li, Longfei,et al. Dynamic recovery and recrystallization of an as-cast SX superalloy during hot deformation[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2025,217:296-310.
APA	Li, Yihang,Jiang, Zhipeng,Li, Longfei,Xie, Guang,Zhang, Jian,&Feng, Qiang.(2025).Dynamic recovery and recrystallization of an as-cast SX superalloy during hot deformation.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,217,296-310.
MLA	Li, Yihang,et al."Dynamic recovery and recrystallization of an as-cast SX superalloy during hot deformation".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 217(2025):296-310.