Microstructural Evolution and Mechanical Properties of a Ni-Based Alloy with High Boron Content for the Pre-Sintered Preform (PSP) Application

doi:10.3390/ma16237483

IMR OpenIR

	Microstructural Evolution and Mechanical Properties of a Ni-Based Alloy with High Boron Content for the Pre-Sintered Preform (PSP) Application
	Gong, Xiufang 1,2; Wu, Yunsheng 3,4; Gao, Zhenhuan 1,2; Sun, Youbei 1,2; Guan, Yingbo 1,2; Guan, Xianjun 3,4; Qin, Xuezhi 3,4; Hou, Jieshan 3,4; Zhou, Lanzhang 3,4
通讯作者	Wu, Yunsheng(yswu16b@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
	2023-12-01
发表期刊	MATERIALS
卷号	16 期号:23 页码:11
摘要	The pre-sintered preform (PSP) is an advanced technology for repairing the Ni-based superalloy blade in a turbine. In general, boron is added to the Ni-based superalloys in small quantities (<0.1 wt.%) to increase boundary strength and cohesivity. Despite this, the effect of high B content (>1.0 wt.%) on the microstructure evolution and mechanical properties in Ni-based superalloys for the PSP application is rarely studied. The variety, composition and evolution of the precipitates during solution heat treatment in the alloy with high B content were determined by EBSD, EPMA and SEM. The results indicate that Cr, W and Mo-rich M5B3 type borides precipitate from the matrix and its area fraction reaches up to about 8%. The area fraction of boride decreases with the prolonging of solution time and the increase of temperature higher than 1120 degrees C. The borides nearly disappear after solution treatment at 1160 degrees C for 2 h. The redissolution of boride and eutectic results in the formation of B-rich area with low incipient melting (about 1189 degrees C). It can bond metallurgically with the blade under the melting point of the blade, which decreases the precipitation of harmful phases of the blade after PSP repairing. The microhardness within the grain in the PSP work-blank first decreases (lower than 1160 degrees C) and then increases (higher than 1185 degrees C) with the increase of solution heat treatment temperature due to the dissolving and precipitation of borides. The tensile strength of the combination of PSP work-blank and Mar-M247 matrix at room temperature after solution treatment is related to the area fraction of boride, incipient melting and the cohesion between PSP work-blank and Mar-M247 matrix.
关键词	microstructural evolution tensile strength Ni-based alloy high boron content pre-sintered preform (PSP)
资助者	Open Bidding for Selecting the Best Candidates Science and Technology Planning Project of Deyang City, Sichuan Province
DOI	10.3390/ma16237483
收录类别	SCI
语种	英语
资助项目	Open Bidding for Selecting the Best Candidates Science and Technology Planning Project of Deyang City, Sichuan Province
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001119039100001
出版者	MDPI
引用统计	被引频次：1[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/321006/177094
专题	中国科学院金属研究所
通讯作者	Wu, Yunsheng; Zhou, Lanzhang
作者单位	1.State Key Lab Clean & Efficient Turbomachinery Pow, Deyang 618000, Peoples R China 2.Dongfang Elect Corp Dongfang Turbine Co LTD, Deyang 618000, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gong, Xiufang,Wu, Yunsheng,Gao, Zhenhuan,et al. Microstructural Evolution and Mechanical Properties of a Ni-Based Alloy with High Boron Content for the Pre-Sintered Preform (PSP) Application[J]. MATERIALS,2023,16(23):11.
APA	Gong, Xiufang.,Wu, Yunsheng.,Gao, Zhenhuan.,Sun, Youbei.,Guan, Yingbo.,...&Zhou, Lanzhang.(2023).Microstructural Evolution and Mechanical Properties of a Ni-Based Alloy with High Boron Content for the Pre-Sintered Preform (PSP) Application.MATERIALS,16(23),11.
MLA	Gong, Xiufang,et al."Microstructural Evolution and Mechanical Properties of a Ni-Based Alloy with High Boron Content for the Pre-Sintered Preform (PSP) Application".MATERIALS 16.23(2023):11.