Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy

doi:10.1007/s10853-022-07156-1

IMR OpenIR

	Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy
	Yu, Xingfu 1; Hu, Chenyang 1; Liu, Hongxiu 1; Liu, Weijun 1; Liu, Fang 2; Sun, Wenrun 2; Su, Yong 3
通讯作者	Yu, Xingfu(yuxingfu@163.com)
	2022-04-01
发表期刊	JOURNAL OF MATERIALS SCIENCE
ISSN	0022-2461
卷号	57 期号:16 页码:7965-7979
摘要	There is serious component segregation during the solidification of boron-containing nickel-based superalloys. The composition of the finally solidified eutectic structure and its surrounding areas is greatly different from that of the matrix, especially for some elements such as B, C, Cr and Mo, which leads to the formation of boride eutectic (BE). The BE has a negative effect on the mechanical properties and reduces the service life of the alloys and decreases the safety and reliability of aero engines. In this study, the morphology and component characteristics of BE structure in a nickel-based superalloy are determined by scanning electron microscopy and Energy Diffraction X-ray analysis. The main components of BE structure are B, C, Cr and Mo, and the initial melting temperature is between 1110 and 1120 degrees C. After diffusion treatment at 1110 degrees C for 10 h, the serious segregation elements are dissolved into the matrix, and the BE structure disappears. Tensile tests show that the BE structure is the weak link in the as-cast alloy and is the crack initiation source. After diffusion treatment, the BE structure dissolves into matrix, cracks initiate at carbides, and the intergranular fracture is transformed into dimple fracture, which improves the tensile strength and plasticity of the alloy.
资助者	Liaoning Educational Committee
DOI	10.1007/s10853-022-07156-1
收录类别	SCI
语种	英语
资助项目	Liaoning Educational Committee[LJ2019014]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000784043700014
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/172925
专题	中国科学院金属研究所
通讯作者	Yu, Xingfu
作者单位	1.Shenyang Univ Technol, Sch Mech Engn, Shenyang 110870, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Shenyang Univ Chem Technol, Sch Mech & Power Engn, Shenyang 110142, Peoples R China
推荐引用方式 GB/T 7714	Yu, Xingfu,Hu, Chenyang,Liu, Hongxiu,et al. Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy[J]. JOURNAL OF MATERIALS SCIENCE,2022,57(16):7965-7979.
APA	Yu, Xingfu.,Hu, Chenyang.,Liu, Hongxiu.,Liu, Weijun.,Liu, Fang.,...&Su, Yong.(2022).Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy.JOURNAL OF MATERIALS SCIENCE,57(16),7965-7979.
MLA	Yu, Xingfu,et al."Effect of diffusion heat treatment on microstructure and mechanical properties of a boron-containing nickel-based superalloy".JOURNAL OF MATERIALS SCIENCE 57.16(2022):7965-7979.