Effect of Orientation Deviation on Microstructure and Mechanical Properties of Nickel-Based Single Crystal Superalloy Brazing Joints

doi:10.11900/0412.1961.2019.00258

IMR OpenIR

	Effect of Orientation Deviation on Microstructure and Mechanical Properties of Nickel-Based Single Crystal Superalloy Brazing Joints
	Zhao Xu 1,2; Sun Yuan 2; Hou Xingyu 2; Zhang Hongyu 2; Zhou Yizhou 1,2; Ding Yutian 1
通讯作者	Sun Yuan(yuansun@imr.ac.cn) ; Zhou Yizhou(yzzhou@imr.ac.cn)
	2020-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	56 期号:2 页码:171-181
摘要	Ni-based single crystal superalloy has excellent high temperature properties, which is the main materials for aero-engine turbine blade. In order to improve the yield strength of single crystal blades, the reliable bonding technology has become an increasingly indispensable key technology in the process of producing single crystal blades. However, there is inevitably an orientation deviation in the bonded single crystal component, owing to its shape complexity and randomness during assembly practice of bonding single crystal components. The CMSX-4 single crystal superalloy with the orientation combination of 0 degrees+0 degrees, 0 degrees+45 degrees and 0 degrees+90 degrees were brazed by Ni-based filler alloy at 1210 degrees C for 30 min and carried out ageing heat treatment. The effect of base material orientation combination on the microstructure was analyzed by SEM, EBSD and EPMA. The mechanical properties of joints after bonding and ageing treatment were tested. The result indicates that the microstructures and phase compositions of three orientation combination joints were similar in the filler alloy zone, consisting of gamma-Ni, gamma', gamma+gamma' eutectic, M3B2 type boride, CrB, nickel-silicon compound and gamma-Ni+Ni3B+CrB ternary eutectic phase. The melting point depressant B in the filler alloy is not diffused significantly to the base material, and no brittle compound phase is precipitated in the diffusion affected zone of the joint. After ageing treatment, elements diffusion is uniform and brittle precipitates are reduced, and the continuous grain boundary can be observed at the center of the joint when the base material on both sides of the joint has orientation deviation. The testing results of mechanical properties show that the base material orientation deviation has no distinctly effect on the room and high temperature tensile properties of the joint. However, the tensile strengths of the joint at room and high temperature both reduce with orientation deviation after ageing treatment, but the degree of orientation deviation has no obvious influence on the tensile strength of the joint. The fracture of the three joints occurs in the filler alloy zone.
关键词	single crystal superalloy orientation deviation nickel-based filler alloy brazing
资助者	National Youth Science Fund Project of China
DOI	10.11900/0412.1961.2019.00258
收录类别	SCI
语种	英语
资助项目	National Youth Science Fund Project of China[51801206]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000507327100005
出版者	SCIENCE PRESS
引用统计	被引频次：5[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/321006/136615
专题	中国科学院金属研究所
通讯作者	Sun Yuan; Zhou Yizhou
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao Xu,Sun Yuan,Hou Xingyu,et al. Effect of Orientation Deviation on Microstructure and Mechanical Properties of Nickel-Based Single Crystal Superalloy Brazing Joints[J]. ACTA METALLURGICA SINICA,2020,56(2):171-181.
APA	Zhao Xu,Sun Yuan,Hou Xingyu,Zhang Hongyu,Zhou Yizhou,&Ding Yutian.(2020).Effect of Orientation Deviation on Microstructure and Mechanical Properties of Nickel-Based Single Crystal Superalloy Brazing Joints.ACTA METALLURGICA SINICA,56(2),171-181.
MLA	Zhao Xu,et al."Effect of Orientation Deviation on Microstructure and Mechanical Properties of Nickel-Based Single Crystal Superalloy Brazing Joints".ACTA METALLURGICA SINICA 56.2(2020):171-181.