在一定组织形态和外界条件下,单相或多相的镍铝金属间化合物及其合金表现出超塑性变形行为,其中多相挤压态NiAl合金及单相NisAl合金的超塑性变形机制是晶界滑移(动态回复和再结晶协调变形);单相NiAl的超塑性变形则来自于变形过程中发生动态回复和再结晶;而定向凝固多相NiAl合金的超塑性则是在拉伸过程中动态再结晶与应变硬化平衡的结果.超塑性变形机制多样性源于镍铝金属间化合物晶体结构独特的物理性质.
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