A modified A286 alloy was developed with the aim of improving elevated temperature strength. The alloy was evaluated using a tensile test and a creep rupture test. Microstructure observations of the modified A286 alloy revealed that W and Ti carbides were precipitated at the grain boundaries and that no η phases were observed. The modified alloy showed higher tensile strength in a test at 625°C and a longer rupture time in a creep rupture test at 650°C relative to the conventional A286 alloy. Hydrogen embrittlement susceptibility was evaluated using a low-strain-rate tensile test with hydrogen-charged specimens. From a comparison of the reduction of area, it was determined that the hydrogen embrittlement resistance of the modified A286 was equal to or greater than that of conventional A286.
Development of a Modified A286 Alloy With Improved Strength at Elevated Temperature and an Evaluation of Its Hydrogen Embrittlement Susceptibility
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Sato, S, Takasawa, K, & Kayano, R. "Development of a Modified A286 Alloy With Improved Strength at Elevated Temperature and an Evaluation of Its Hydrogen Embrittlement Susceptibility." Proceedings of the ASME 2015 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Boston, Massachusetts, USA. July 19–23, 2015. V06BT06A013. ASME. https://doi.org/10.1115/PVP2015-45336
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