Interfacial evolution and mechanical behavior of explosively welded titanium/steel joint under subsequent heat treatment process

Abstract

The TA2/15CrNi3MoV clad plates were fabricated by explosive welding and then were heat-treated in the temperature range of 700-1000 ℃ for 30 min. Its microstructure and tensile strength were investigated and the results elucidated that the heat treatment process accelerated the interdiffusion of constituent elements (e.g., Fe, Ti and C) at the TA2/15CrNi3MoV interface, thus resulting in the formation of FeTi, Fe 2 Ti and TiC.For the samples heat-treated at 700 ℃, a continuous TiC layer was generated at the TA2/15CrNi3MoV interface, which hampered the formation of FeTi and Fe 2 Ti. However, for the samples heat-treated at 800 ℃, the continuous TiC layer was broken up, resulting in a signi cant increase in the Fe-Ti layer to 1.21 μm. This resulted in a dramatic drop in tensile strength to 329.2 MPa. For samples heat-treated in the temperature range of 900-1000 ℃, the thickness of the brittle Fe-Ti layer was increased dramatically, leading to a rapid drop in tensile strength.

Experimental investigation on microstructure, hardness and corrosion resistance of an electromagnetic welded titanium-stainless steel dissimilar materials

“…Galvanic corrosion can happen in the joints of hybrid constructions as a result of the notable variations in physical and chemical properties between dissimilar metals, accelerating the corrosion process of the joints [13,15,[17][18][19][20][21][22][23].…”

Investigation on the microstructure and mechanical properties of large-tube forging manufactured by additive forging

“…15CrNi3MoV steel, a high-strength alloy steel, is extensively used in the manufacture of large-tube marine forgings because of its good weldability, hardenability, and low-temperature toughness [1,2]. Marine large-tube forgings support propellers and allow them to extend outward as far as possible.…”

Interfacial evolution of titanium/steel clad plates during pulsed tungsten inert gas welding

“…During the subsequent pulsed TIG welding process, the explosively welded Ti/steel clad plates underwent welding thermal cycles, resulting in the Ti/steel clad plates being exposed to high temperatures. At higher temperatures, brittle IMCs in the explosive welding interface region were generated, which degraded the mechanical properties [13]. In addition, residual stresses were generated at the interface region due to the inconsistency of physical properties between IMCs and base materials, such as the linear expansion coefficient and heat transfer [11,33].…”

“…The solid-state metal joining process offers an excellent alternative to conventional fusion welding in this case, such as explosive welding [13,14], roll bonding [15][16][17] and diffusion bonding [18,19]. Among these methods, explosive welding (EXW) is usually considered a relatively versatile joining process due to its simple process, low loss and high quality [10,20].…”