Microstructure evolution of single crystal superalloy DD5 joints brazed using AWS BNi-2 filler alloy

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	Microstructure evolution of single crystal superalloy DD5 joints brazed using AWS BNi-2 filler alloy
	Y.; Liu Sun, J.; Li, B.; Li, H.; Jin, T.
	2014
发表期刊	Materials Research Innovations
ISSN	1432-8917
卷号	18 页码:341-346
摘要	Nickel based single crystal superalloy DD5 was brazed with the AWS classification filler metal BNi- 2 at brazing temperature of 1323-1423 K for holding 10-240 min. The effect of the brazing temperature and brazing time on the microstructure of the brazed joint was investigated by scanning electron microscope (SEM) and electron probe microanalyser (EPMA). The result indicates that the joints exhibit sound bonding without any defect and crack. Three distinct regions can be identified in the joint: a diffusion affect zone composed of gamma-gamma' phase and fine M3B2 precipitates, an interfacial bonding zone solidified isothermally at the brazing temperature, and braze alloy zone formed by the solidification of surplus molten filler alloy during cooling. The braze alloy zone consists of gamma+gamma' eutectic phase, chromium boride, and ternary eutectic phase of gamma-nickel, nickel boride and nickel silicide. With extending brazing time, the thickness of interfacial bonding zone and diffusion affect zone increased while brittle compounds reduced. The bonding mechanism was discussed with reference to the microstructure evolution of the joint.
部门归属	[sun, y. ; liu, j. ; li, b. ; li, h. ; jin, t.] chinese acad sci, imr, dept superalloys, beijing, peoples r china. ; sun, y (reprint author), chinese acad sci, imr, dept superalloys, cas, beijing, peoples r china. ; yuansun@imr.ac.cn
关键词	Single Crystal Superalloy Brazing Bni-2 Filler Alloy Microstructure Mechanism Base Temperature Silicon
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73928
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y.,Liu Sun, J.,Li, B.,et al. Microstructure evolution of single crystal superalloy DD5 joints brazed using AWS BNi-2 filler alloy[J]. Materials Research Innovations,2014,18:341-346.
APA	Y.,Liu Sun, J.,Li, B.,Li, H.,&Jin, T..(2014).Microstructure evolution of single crystal superalloy DD5 joints brazed using AWS BNi-2 filler alloy.Materials Research Innovations,18,341-346.
MLA	Y.,et al."Microstructure evolution of single crystal superalloy DD5 joints brazed using AWS BNi-2 filler alloy".Materials Research Innovations 18(2014):341-346.