Hot corrosion is a critical problem in wide range of high-temperature applications. Ni–20Cr alloy frequently used such applications owing to its good hot-corrosion resistance. In the current work, thick plates thickness 6–10 mm were fabricated using cold spray-based additive manufacturing (CSAM). High-pressure spraying was with nitrogen as propellant gas. Pre- (substrate heating, SH) and post-h...

The grain size effects on the hydrogen embrittlement susceptibility of pure Ni and Ni-20Cr alloy were investigated. was evaluated by tensile testing under electrochemical charging. Relative elongation, defined as elongation charging divided in air, increased with increasing (the range 11-22 µm). In contrast, relative decreasing from 13 to 1.8 µm. Correspondingly, intergranular fracture suppress...

Abstract: The high cycle fatigue property of carburized 20Cr gear steel was experimentally investigated under axial loading with a stress ratio of zero. The test results show that this steel exhibits gradually decreasing S-N characteristics, and the fatigue strength corresponding to 109 cycles is about 455 MPa. Based on the observation of fracture surfaces, the interior inclusion fisheye-induce...

The mechanism of secondary hardening in MP35N (Co–35Ni–20Cr–10Mo) alloy due to exposures at elevated temperatures has been studied. It was observed that short exposure to elevated temperatures increased the ultimate tensile strength and yield stress while decreasing the elongation of MP35N wires. Upon aging at temperatures from 300 to 900 C the elastic modulus increased although no changes in c...

The effects of grain size on the hydrogen embrittlement susceptibility pure Ni and Ni–20Cr alloy were investigated. was evaluated through tensile testing under electrochemical charging. Relative elongation, defined as elongation charging divided by in air, increased with increasing (the range 11–22 µm). In contrast, relative decreasing from 13 to 1.8 µm. Correspondingly, intergranular fracture ...