The laser energy density was believed to control microstructure and mechanical properties of additive-manufactured Inconel 718 (IN718) alloy. However, in this study, remarkable differences were found the microstructures, tensile properties, fracture surfaces industrial IN718 alloy (with densities higher than 99.75%), which fabricated by Laser Powder Bed Fusion (LPBF) processes with almost ident...

In the present paper, Inconel 718 alloy was prepared by direct metal laser sintering. The bare post-processed through different heat-treatment routes, and changes in its metallurgical microstructural properties were investigated. comparison to alloy, grains overlapping region of heat-treated alloys became refined. strengthening phase γ’ γ” precipitations high alloys. Furthermore, cyclic oxidati...

A high strength nickel chromium alloy (50Cr-50Ni-Nb alloy), commonly referred to as IN-657, is specifically used for components in furnaces which are fired by low grade fuel oils containing high levels of vanadium, sodium and sulphur. The purpose of this study is to experimentally investigatethe effect of machining parameters on machinability in turning of Inconel 657. The considered parameters...

A new post-weld heat treatment (PWHT) cycle was designed for novel dissimilar linear friction welding (LFW) of selective laser melted (SLM) Inconel 718 (IN718) to AD730 forged nickel-based superalloy. The microstructure and hardness the joints after PWHT are investigated compared with those as-linear welded samples. precipitation γ′ + γ″ is determined as main mechanism increase mechanical prope...

A possible application of a metal powder composition made high-temperature nickel-based alloy with high heat strength (the material is analogous to Inconel 718) in selective laser melting (SLM, an additive manufacturing technology) was considered. Peculiarities formation the course have been researched, and mechanical properties were determined. The effect thermal treatment mode on characterist...

A high strength nickel chromium alloy (50Cr-50Ni-Nb alloy), commonly referred to as IN-657, is specifically used for components in furnaces which are fired by low grade fuel oils containing high levels of vanadium, sodium and sulphur. The purpose of this study is to experimentally investigatethe effect of machining parameters on machinability in turning of Inconel 657. The considered parameters...

The surface of Inconel 625, a nickel-base alloy, was strengthened by vacuum electron beam scanning technology. evolution its microstructure analyzed backscatter diffraction (EBSD) and the friction wear tester (RETC). results show that FCC phase in 625 alloy is stripped islanded after treatment. austenite texture type changes finally forms typical cubic with certain strength S texture. With incr...