水素吸収した鉄-2at% チタン合金の機械的性質

概要

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Fe-2at% Ti alloys annealed in vacuum and quenched from hydrogen or herium atmosphere at 720℃ were pulled in tension between room temperature and -196℃ at a strain rate of 1.43×10^<-4>/sec. It was found that at room temperature the yield stress of the alloy quenched from hydrogen atmosphere at 1 atm was approximately twice as that of vacuum annealed one. The yield point behavior and solid solution softening possibility by hydrogen atoms were discussed. A strain-rate cycling test was done in order to obtain the information about the hardening mechanism. The yield stress of the alloy quenched from hydrogen atmosphere at 1 atm was decreased rapidly by a low temperature aging process, but the electrical resistivity was increased by the same aging process, and the lattice constant did not change by the aging process at 40℃. It may be concluded that iron-titanium-hydrogen alloys are strengthened by Ti-H clusters and that the Ti-H cluster decomposition and hydrogen emission occur by a low temperature aging process.
社団法人日本鉄鋼協会の論文
1973-10-01