MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A Ni_3Al-Fe BASED ALLOY

Abstract

Abstract: The microstructure,tensile properties at 20—950℃ and creep rupture properties at 700- 900℃ in a Ni_3Al-Fe based alloy after high temperature deformation have been studied.The results show the microstructure of the alloy is composed of γ′-and β-phases.The grain size and yield strength of the alloy is stable when the temperature≤600℃,and it is ductile at high temperature.The creep of the alloy at 700—900℃ is controlled by the climbing of dislo- cations,and the activation energy for creep is 439 KJ/mol with a stress exponent of 4.

Key words: Ni_3Al-Fe based alloy, microstructure, mechanical property, creep rupture property

LI Hui GUO Jianting TAN Minghui SUN Chao LAI Wanhui WANG Shuhe Institute of Metal Research,Academia Sinica,Shenyang,China Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China. MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A Ni_3Al-Fe BASED ALLOY[J]. Acta Metallurgica Sinica (English Letters), 1993, 6(1): 40-45.

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MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A Ni_3Al-Fe BASED ALLOY

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