Carbide Effects on Creep Crack Growth of Ni-Cr Austenitic Steels
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG1992年第6期
论文作者：祝苏明 朱世杰 王富岗 张俊善
文章页码：391 - 396
摘 要：<正> By controlling the carbon content ofFe-15Cr-25Ni alloys,three types ofmicrostructures were obtained:single phaseaustenite （γ）,γ+intergranular carbides,γ+intergranular carbides + intragranular carbides.Creep crack growth behaviour of the three alloyshas been compared at 973 K and 1123 K.Intergranular carbides show higher creep crackgrowth resistance than intragranular carbides.Cav-ities nucleate at the triple junctions of grain bound-aries for single phase alloy,but at intergranularcarbides for two-phase alloys.The precipitation ofintergranular carbide not only changes thenucleation mechanism of cavities,but also inhibitsthe growth and coalescence of cavities.The precipi-tation of intragranular carbide obstructs thenucleation and growth of cavities furthermore.
祝苏明，朱世杰，王富岗，张俊善
摘 要：<正> By controlling the carbon content ofFe-15Cr-25Ni alloys,three types ofmicrostructures were obtained:single phaseaustenite （γ）,γ+intergranular carbides,γ+intergranular carbides + intragranular carbides.Creep crack growth behaviour of the three alloyshas been compared at 973 K and 1123 K.Intergranular carbides show higher creep crackgrowth resistance than intragranular carbides.Cav-ities nucleate at the triple junctions of grain bound-aries for single phase alloy,but at intergranularcarbides for two-phase alloys.The precipitation ofintergranular carbide not only changes thenucleation mechanism of cavities,but also inhibitsthe growth and coalescence of cavities.The precipi-tation of intragranular carbide obstructs thenucleation and growth of cavities furthermore.
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