Hot isostatic diffusion bonding of titanium alloy Ti-6Al-4V to gamma titanium aluminide IHI Alloy 01A

Diffusion Bonding of γ(TiAl) Alloys: Influence of Composition, Microstructure, and Mechanical Properties

“…In view of this potential, there has been a systematic effort toward diffusion bonding TiAl alloys with each other [2][3][4][5] or with other materials. [6] While there is substantial literature on the diffusion bonding of TiAl alloys, the bulk of this work has focused on the technological aspects and feasibility. There has been a limited amount of work done on the metallurgical processes that control diffusion bonding.…”

Influence of Bonding Temperature on Structure and Strength Properties of Titanium and Micro-duplex Stainless Steel Diffusion Bonded Joints

“…The polished surfaces of Ti and MDSS were kept in contact in a fixture and the assembly was inserted in a chamber. The transition joints were prepared in the temperature range of 800 to 1 000°C in steps of 50°C for 3.6 ks in (6)(7)(8) In the present study, diffusion bonding of titanium and micro-duplex stainless steel was investigated in vacuum. Diffusion interfaces were characterized using light microscopy, scanning electron microscopy and X-ray diffraction technique.…”

“…[1][2][3] On the other hand, micro-duplex stainless steel reveals austenite-ferrite structure with a good combination of strength and toughness, excellent corrosion resistance for medium temperature application and it has super-plastic behaviour at/about 1 000°C during processing. [4][5][6] Traditional fusion welding or mechanical joining of dissimilar materials promotes the distortion of components, formation of stress concentration sites and development of chemical heterogeneities, which result in crevice corrosion or fatigue failure during service. 7,8) The direct bonding between titanium/titanium alloy and stainless steel promotes the formation of various intermetallic compounds due to the limited solid-solubility of Fe, Cr, Ni and Ti in each other.…”

Diffusion bonding of laser surface modified TiAl alloy/Ni alloy

“…Sound joining of TiAl alloys to other high temperature materials plays a key role in making their successful integration into high temperature aerospace applications. Recently, only a few studies have been published on the diffusion bonding of TiAl alloys to other materials [5,6]. Holmquist and Recina [6] investigated a possibility for diffusion bonding of TiAl alloy to Ti-6Al-4V alloy using hot isostatic pressing (HIP) method, and succeeded it in obtaining sound bonds.…”

“…Recently, only a few studies have been published on the diffusion bonding of TiAl alloys to other materials [5,6]. Holmquist and Recina [6] investigated a possibility for diffusion bonding of TiAl alloy to Ti-6Al-4V alloy using hot isostatic pressing (HIP) method, and succeeded it in obtaining sound bonds. However, the process included bonding temperatures of 1173, 1213 and 1253 K, which may induce material degradation due to undesired phase transformation and therefore prevent its practical applications.…”