很多Ni基高温合金是用γ′相沉淀来强化的。γ′同基体共格且为有序的LI_2型晶体结构。它本身具有很好的高温强度和范性,并能固溶大量其他合金元素而被进一步强化,故γ′的作用是很显著的。在变形Ni基高温合金中γ′的体积分数、粒子大小及其间距无疑是影响合金强度的重要因素。对γ′相的含量不超过20%的合金,γ′的粒子大小直接关系到与位错交互作 Many Ni-based superalloys are fortified with γ ’phase precipitates. γ ’is coherent with the matrix and is an ordered LI_2 crystal structure. It has a very good high temperature strength and the scope of its own, and can be a large number of other solid solution element is further strengthened, so the role of γ ’is very significant. In the deformed Ni-based superalloy γ ’volume fraction, particle size and spacing is undoubtedly an important factor affecting the strength of the alloy. For alloys with a γ ’phase content of up to 20%, the particle size of γ’ is directly related to the interaction with dislocations