Effects of thermo-mechanical processing on the microstructure of Inconel 617 alloy

doi:10.1016/j.mtcomm.2025.111574

IMR OpenIR

	Effects of thermo-mechanical processing on the microstructure of Inconel 617 alloy
	Hu, Honglei 1; Li, Jiawen 1; He, Wenwen 1; Lu, Shuangli 1; Lu, Yanhong 2; Ma, Guangcai 3; Zhang, Jiawei 4
通讯作者	Lu, Shuangli() ; Lu, Yanhong() ; Ma, Guangcai()
	2025
发表期刊	MATERIALS TODAY COMMUNICATIONS
卷号	42 页码:10
摘要	Inconel 617 alloy is one of the potential materials for high temperature and highly corrosive applications. During long-term service, grain boundaries (GBs), particularly random grain boundaries (RGBs), are crucial sites for intergranular corrosion and GB cracking initiation and propagation. Therefore, grain boundary engineering (GBE) is proposed to regulate GB structure by increasing the presence of Sigma 3(n) boundaries and disrupting the RGB network. This study explores how deformation heat treatments affect grain boundary characteristics distribution (GBCD) in Inconel 617, focusing on different deformation levels, annealing temperatures, and annealing times. Results show a decrease in Sigma 3(n) boundaries with increased deformation, indicating a trend towards recrystallization. Both higher (1200 degrees C) and lower (1100 degrees C) annealing temperatures are less favorable for Sigma 3 boundary formation, with the optimal Sigma 3(n) boundary fraction observed at 1150 degrees C. Longer annealing times promote reactions between Sigma 3(n) boundaries, leading to the formation of Sigma 9 + Sigma 27 boundaries. Detailed characterization of the thermo-mechanical processing (TMP) specimen suggests that a lower deformation extent (5 %) followed by an extended annealing period (2 h) at 1150 degrees C yields a GBE microstructure with a higher proportion of Sigma 3(n) boundaries (similar to 72.54 %), due to enhanced activation of multiple twinning. The 5 % cold rolling deformation followed by annealing at 1150 degrees C for 2 h results in minimal recrystallization, as the deformation level is insufficient to induce significant recrystallization. During subsequent annealing, GB migration becomes the dominant process. This leads to the formation of more J2 and J3 type triple junctions, which disrupt the connectivity of the GB network.
关键词	Grain boundary engineering Inconel 617 alloy Grain boundary characteristic distribution Sigma 3(n) grain boundary Triple junctions
资助者	Natural Science Foundation of Shanghai ; Three-year Action Plan of Shanghai Science and Technology Commission
DOI	10.1016/j.mtcomm.2025.111574
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Shanghai[21ZR1424600] ; Three-year Action Plan of Shanghai Science and Technology Commission[23010500800] ; Three-year Action Plan of Shanghai Science and Technology Commission[23010501100]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001401812200001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180287
专题	中国科学院金属研究所
通讯作者	Lu, Shuangli; Lu, Yanhong; Ma, Guangcai
作者单位	1.Shanghai Dianji Univ, Sch Mech Engn, Shanghai 201306, Peoples R China 2.Shanghai Elect Nucl Power Equipment Corp Ltd, Shanghai 201306, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Anal & Test Ctr, Shenyang 110016, Peoples R China 4.MCC Heavy Ind Tangshan Co Ltd, Tangshan 063000, Peoples R China
推荐引用方式 GB/T 7714	Hu, Honglei,Li, Jiawen,He, Wenwen,et al. Effects of thermo-mechanical processing on the microstructure of Inconel 617 alloy[J]. MATERIALS TODAY COMMUNICATIONS,2025,42:10.
APA	Hu, Honglei.,Li, Jiawen.,He, Wenwen.,Lu, Shuangli.,Lu, Yanhong.,...&Zhang, Jiawei.(2025).Effects of thermo-mechanical processing on the microstructure of Inconel 617 alloy.MATERIALS TODAY COMMUNICATIONS,42,10.
MLA	Hu, Honglei,et al."Effects of thermo-mechanical processing on the microstructure of Inconel 617 alloy".MATERIALS TODAY COMMUNICATIONS 42(2025):10.