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用ＴＥＭ研究了Ｌ１２长程有序结构Ｎｉ７４．５Ｐｄ２Ａｌ２３．５合金室温变形后的位错结构．结果表明，加Ｐｄ韧化的Ｎｉ７４．５Ｐｄ２Ａｌ２３．５合金室温变形组织中存在着大量超点阵内禀层错．这些层错是从以反相畴态分解的ａ／２〈０１１〉位错通过进一步的分解和反应转变来的．层错的形成是合金变形过程中位错交互作用的二次产物，并不成为影响Ｎｉ７４．５Ｐｄ２Ａｌ２３．５合金变形和韧性的主要因素．
The dislocation structure of L12 long-range ordered Ni74.5Pd2Al23.5 alloy after room temperature deformation was studied by TEM. The results show that there is a large amount of superlattice intrinsic layer fault in the deformed structure of Ni74.5Pd2Al23.5 alloy with Pd toughening. These layer faults are transformed from further decomposition and reaction from a / 2 <011> dislocations that decompose in opposite phase states. The formation of layer faults is a secondary product of the dislocation interaction during the deformation of the alloy and does not become the main factor that affects the deformation and toughness of the Ni74.5Pd2Al23.5 alloy.