An investigation on microstructure evolution and mechanical properties during transient liquid phase bonding of stainless steel 316L to Ti-6Al-4V

作者：Zakipour Shahrokh; Halvaee Ayoub; Amadeh Ahmad Ali; Samavatian Majid^*; Khodabandeh Alireza

来源：Journal of Alloys and Compounds, 2015, 626: 269-276.

DOI：10.1016/j.jallcom.2014.11.160

• Diffusion
• Intermetallic compounds
• Isothermal solidification
• Microstructure
• Eutectic

Transient liquid phase bonding mechanism of two dissimilar alloys stainless steel 316L and Ti-6Al-4V using pure Cu interlayer with different thicknesses was studied. In order to characterize the microstructure and compositional changes in the joint zone, scanning electron microscopy equipped with energy dispersive spectroscopy and X-ray diffraction have been applied. Microhardness and shear strength tests have been performed to investigate mechanical properties of the joints. The results showed that there are various intermetallic compounds at the interface caused by interdiffusion of Ti, Fe and Cu across the joint zone. Furthermore, increasing the interlayer thickness led to incompletion of bonding process in 60 min. The maximum shear strength of 220 MPa has been attained for the bond made at 900 degrees C. With the rise in bonding temperature to 960 degrees C, a reduction in bond strength occurs attributed to increase in width of joint zone and formation of more brittle intermetallic compounds at the interface.

• 出版日期2015-3-25