EFFECT OF MICROSTRUCTURE ON MECHANICAL PROPERTIES OF INCOLOY 907

Abstract

Abstract: Effect of microstructure on the mechanical properties of a precipitation strengthening Fe-Ni-Co based low expansion alloy,Incoloy 907.has been investigated under different heat treatments.The dispersed γ-phase is found to be the principal strengthening phase in the alloy.The microstructure of the alloy with even dispersed fine γ′-phase seems to have the best mechanical properties.However,it will be worsened if the alloy was aged at some higher tem- perature or overaged to precipitate needle-like ε-phase.

Key words: precipitation strengthening, austenite alloy, microstructure, mechanical property, Incoloy 907

XIE Yun YANG Ke ZHAO Xu FAN Cungan LI Yiyi Institute of Metal Research,Academia Sinica,Shenyang,China. EFFECT OF MICROSTRUCTURE ON MECHANICAL PROPERTIES OF INCOLOY 907[J]. Acta Metallurgica Sinica (English Letters), 1992, 5(4): 245-249.

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EFFECT OF MICROSTRUCTURE ON MECHANICAL PROPERTIES OF INCOLOY 907

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