Precipitation Behavior and Mechanical Properties of a Ni-Based Alloy with Different Silicon Contents

doi:10.1007/s11665-023-08553-6

IMR OpenIR

	Precipitation Behavior and Mechanical Properties of a Ni-Based Alloy with Different Silicon Contents
	Wang, Changshuai 1; Zhang, Fengzhi 1,2; Wu, Yunsheng 1; Zhou, Lanzhang 1
通讯作者	Wang, Changshuai(cswang@imr.ac.cn)
	2023-08-04
发表期刊	JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
ISSN	1059-9495
页码	13
摘要	Precipitation behavior and mechanical properties of a silicon (Si) micro-alloying Ni-based alloy, considered as important structural materials in turbine, were investigated during exposure at 700 degrees C for up to 5000 h. Results reveal that the primary precipitates of solution-annealed Si micro-alloying alloys are MC carbide and Laves phase, but only MC carbide appears in alloy without Si addition. MC carbide decreases and Laves phase increases with increasing Si content. During thermal exposure at 700 degrees C, gamma'', delta, M6C and M23C6 precipitate and the major precipitate changes from gamma'' to d and then to M6C with increasing Si content. Moreover, Si suppresses the formation of film-like M23C6 carbide at grain boundary. Compared with solution-annealed alloys, the yield strength increases drastically after exposure at 700 degrees C. Moreover, with increasing Si content, the tensile properties almost keep at the same level when Si content is less than 1.0 wt.%. This indicates that gamma'', delta and M6C all have excellent strengthening effect in the present alloy. However, adding 1.5 wt.% Si significantly deteriorates the performance due to M6C coarsening and the formation of the cluster of blocky Laves phase. The strengthening effect of M6C has significant size effect. Consequently, it can be concluded that adding Si can efficiently improve castability and enhance steam oxidation resistance, and meanwhile keep excellent mechanical properties by controlling Si content.
关键词	gamma'' phase delta phase carbides Ni-based alloy silicon tensile properties
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China
DOI	10.1007/s11665-023-08553-6
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2021YFB3704103] ; National Natural Science Foundation of China[51971216] ; National Natural Science Foundation of China[51301171]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001042488100004
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/321006/178988
专题	中国科学院金属研究所
通讯作者	Wang, Changshuai
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Wang, Changshuai,Zhang, Fengzhi,Wu, Yunsheng,et al. Precipitation Behavior and Mechanical Properties of a Ni-Based Alloy with Different Silicon Contents[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2023:13.
APA	Wang, Changshuai,Zhang, Fengzhi,Wu, Yunsheng,&Zhou, Lanzhang.(2023).Precipitation Behavior and Mechanical Properties of a Ni-Based Alloy with Different Silicon Contents.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,13.
MLA	Wang, Changshuai,et al."Precipitation Behavior and Mechanical Properties of a Ni-Based Alloy with Different Silicon Contents".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2023):13.