水素吸収した鉄-2at%チタン合金の機械的性質
1973 年 59 巻 12 号 p. 1570-1577
詳細
1973 年 59 巻 12 号 p. 1570-1577
Fe-2at% Ti alloys annealed in vacuum and quenched from hydrogen or herium atmosphere at 720°C were pulled in tension between room temperature and -196°C 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°C.
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.
