Strain-controlled fatigue properties of linear friction welded dissimilar joints between Ti–6Al–4V and Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloys

Microstructure and Mechanical Properties of Friction Welding Joints with Dissimilar Titanium Alloys

“…It suggests that a highly durable and sound dissimilar joint of Ti64 and Ti17 was achieved via LFW process. The phenomenon was also observed in the tensile and fatigue tests on dissimilar LFW joints of Ti-6Al-4V to Ti-6.5Al-3.5Mo-1.5Zr-0.3Si [20,21]. This may be resulting from the lower strength of Ti64 and the reaction zone formed at Ti64 side.…”

“…In addition, they investigated the mechanical properties and found the tensile strength of the joint was comparable to that of the parent [20]. Wen et al made LFW dissimilar joints of Ti-6Al-4V and Ti-6.5Al-3.5Mo-1.5Zr-0.3Si and evaluated the microstructure, microhardness, and fatigue properties of the joint, which had essentially symmetrical hysteresis loops and an equivalent fatigue life to the base metals [21]. Zhao et al investigated the influence of strain rate on the tensile properties of LFW dissimilar joints between Ti-6.5Al-3.5Mo-1.5Zr-0.3Si and Ti-4Mo-4Cr-5Al-2Sn-2Zr titanium alloys [22].…”

“…Although LFW is a promising process for joining dissimilar titanium alloys, there are only a few public papers on this subject [20][21][22][23]. There are a great many publications about the LFW process for same titanium alloy.…”

Strain hardening behavior of linear friction welded joints between TC11 and TC17 dissimilar titanium alloys

“…The microstructures of WZ between TC11 and TC17 alloys are different each other. The microstructure on the TC11 side of WZ consists of acicular and fine martensites α 0 and α″ during the thermo-mechanical processing due to high thermal conductivity and fast cooling rate and a relatively short dynamic recrystallization (DRX) period [8,27,28], as shown in Fig. 2(b) and (d).…”

Effects of post-weld heat treatment on fracture toughness of linear friction welded joint for dissimilar titanium alloys

“…At present, research on linear friction welding of titanium alloys mainly focuses on welding process, joint microstructure and conventional mechanical properties [13][14][15][16]. There are few studies and reports in regard to the effect of joint microstructure on fracture toughness considered as a crucial factor indicating the integrity of a BLISK.…”