A new understanding of phase transformation in vacuum electron beam welding of NS163 Co-based superalloy and AISI 410L stainless steel: Based on in situ observation and variant selection

doi:10.1016/j.vacuum.2024.113862

IMR OpenIR

	A new understanding of phase transformation in vacuum electron beam welding of NS163 Co-based superalloy and AISI 410L stainless steel: Based on in situ observation and variant selection
	Wen, Xin 1,2; Gao, Xinyu 1,2; Qiao, Shichang 1,2; Wang, Fengzhen 1,2; Li, Na 1,2; Liu, Shuai 2; Yuan, Chao 1,2
通讯作者	Yuan, Chao(ychao@imr.ac.cn)
	2025-02-01
发表期刊	VACUUM
ISSN	0042-207X
卷号	232 页码:11
摘要	This study establishes a link between crystallographic variants and mechanical properties at both the edge and center regions of NS163 Co-based superalloy wires and AISI 410L stainless steel plates welded joints. The thermal cycle of vacuum electron beam welding was simulated using in situ laser confocal microscopy to clarify the martensitic transformation process. Results indicate that martensite preferentially nucleates at grain boundaries, maintaining the Kurdjumov-Sachs orientation relationship with the parent austenite. Most variant boundaries in these regions correspond to variants within the same crystal packet, with V1/V3&V5 emerging as dominant pairs. At the edge, the increased cooling rate and temperature gradient amplify the driving force for martensitic transformation, fostering the generation of diverse variants. Conversely, lower cooling rate at the center raises the martensitic transformation temperature and expands variant selection. The study notes significant dislocation slip during micropillar compression, with the edge of weld exhibiting finer martensite laths and dense dislocations, which enhances strength (similar to 1279 MPa) compared to the center (similar to 1040 MPa), aligning with the results obtained via nanoindentation. The observed "size effect" results in a twice strength as measured by micropillar compression compared to nanoindentation. Additionally, staggered Bain groups at the edge include a greater number of high angle grain boundaries, indirectly improving toughness. This research aligns with recent literature and aids in the development of compositional design and machining techniques for heterogeneous welds.
关键词	Electron beam welding (EBW) Martensitic transformation Mechanical property Variant selection In situ
资助者	Liaoning S T Project
DOI	10.1016/j.vacuum.2024.113862
收录类别	SCI
语种	英语
资助项目	Liaoning S T Project[2023JH1/10400054]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001397913900001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180127
专题	中国科学院金属研究所
通讯作者	Yuan, Chao
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wen, Xin,Gao, Xinyu,Qiao, Shichang,et al. A new understanding of phase transformation in vacuum electron beam welding of NS163 Co-based superalloy and AISI 410L stainless steel: Based on in situ observation and variant selection[J]. VACUUM,2025,232:11.
APA	Wen, Xin.,Gao, Xinyu.,Qiao, Shichang.,Wang, Fengzhen.,Li, Na.,...&Yuan, Chao.(2025).A new understanding of phase transformation in vacuum electron beam welding of NS163 Co-based superalloy and AISI 410L stainless steel: Based on in situ observation and variant selection.VACUUM,232,11.
MLA	Wen, Xin,et al."A new understanding of phase transformation in vacuum electron beam welding of NS163 Co-based superalloy and AISI 410L stainless steel: Based on in situ observation and variant selection".VACUUM 232(2025):11.