繊維強化によるNi_3Al-Mo複合材料の高温強度

概要

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The strength of directionally solidified Ni_3Al-Mo alloys was investigated in tension at temperatures ranging from temperature to 1273K.The 0.2% flow stress showed the positive temperature dependence.The flow stress increased with increasing temperature,reached a peak at 973K and then decreased.The effect of Mo fiber on the strength was dominant at temperatures lower than 973K,but it became weaker above 973K because the strength of fiber decreased.The microstructures of deformed Ni_3Al matrix changed at test temperatures.Below the peak temperature long straight dislocations,which appear be cross slip,were found in the matrix.At temperatures higher than 973K three-dimensional networks of dislocations were formed,whichindicates that the recovery process is more active.
社団法人日本材料学会の論文
1990-07-15