Dissimilar transient liquid phase bonding of Ti-6Al-4V alloy to Inconel 625 superalloy: effect of bonding temperature on microstructural evolutions and mechanical properties

IF 2.4 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Welding in the World Pub Date : 2024-04-30 DOI:10.1007/s40194-024-01777-7

Behnam Zorriatolhosseini, Seyyed Ehsan Mirsalehi, Faezeh Shamsi

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Abstract

The present study investigated the effect of bonding temperature on the dissimilar transient liquid phase (TLP)–bonded IN-625/Ti-6Al-4V dissimilar joints using a thin foil of pure copper as the interlayer. The samples were bonded in a vacuum chamber at 900, 930, and 960 °C for 60 min. The results indicated the occurrence of different intermetallic compounds such as Ti₂Cu, TiCu₂, TiCu, NiTi, and Ni₃Ti at different bonding temperatures, and it was concluded that in all the samples, isothermal solidification was accomplished. Maximum shear strength of 278 MPa was achieved at 930 °C. At lower bonding temperatures, the presence of porosities and cracks decreases the shear strength. At higher temperatures, a high-volume percentage of intermetallic compounds embrittled the specimen and reduced its shear strength. The results of scanning electron microscopy of the fracture surfaces revealed the formation of extensive cleavage fracture and river-like patterns in all samples, indicating a brittle failure mode.

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Ti-6Al-4V 合金与 Inconel 625 超级合金的异种瞬态液相键合：键合温度对微观结构演变和机械性能的影响

本研究探讨了粘接温度对以纯铜薄箔为中间层的瞬态液相（TLP）粘接 IN-625/Ti-6Al-4V 异种接头的影响。样品在真空室中分别于 900、930 和 960 °C 下粘合 60 分钟。结果表明，在不同的粘合温度下出现了不同的金属间化合物，如 Ti2Cu、TiCu2、TiCu、NiTi 和 Ni3Ti，并得出结论：所有样品都实现了等温凝固。在 930 ℃ 时，达到了 278 兆帕的最大剪切强度。在较低的结合温度下，气孔和裂缝的存在会降低剪切强度。在较高温度下，高体积百分比的金属间化合物使试样脆化，降低了其剪切强度。对断裂表面进行扫描电子显微镜观察的结果表明，所有试样都形成了广泛的劈裂断口和河流状图案，这表明试样属于脆性破坏模式。

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来源期刊

Welding in the World METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

4.20

自引率

14.30%

发文量

181

审稿时长

6-12 weeks

期刊介绍： The journal Welding in the World publishes authoritative papers on every aspect of materials joining, including welding, brazing, soldering, cutting, thermal spraying and allied joining and fabrication techniques.