Creep mechanism of highly purified V–4Cr–4Ti alloys during thermal creep in a vacuum
作者： Ken-ichi Fukumoto , Takuya Nagasaka , Takeo Muroga , Nobuyasu Nita , Hideki Matsui
DOI: 10.1016/J.JNUCMAT.2007.03.074
关键词: Dislocation creep 、 Activation energy 、 Materials science 、 Composite material 、 Atmospheric temperature range 、 Alloy 、 Grain boundary 、 Dislocation 、 Diffusion creep 、 Creep
摘要: Abstract Pressurized thermal creep tubes of highly purified V–4Cr–4Ti, the NIFS-Heat-2 alloy have been examined following testing in range 700–850 °C. It was found that stress exponent is about five and characteristic mechanism dislocation usually observed pure metals. The apparent activation energy deformation 210 kJ/mol temperature Creep considered to be controlled by climb-controlled dislocation-glide at 850 °C, where sub-grain boundary structure predominates consists dipole structures pile-ups dislocations.
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