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在760－1050℃和750－140MPa范围内，选择不同温度和应力的配合对CMSX－2合金进行持久拉伸至断裂，观察了试件原始树枝状晶各区域（枝晶干、枝晶臂及枝晶间）中γ’相的定向粗化及合金元素的分布特征结果表明，γ’的走向粗化程度在枝晶干内最大，在枝晶臂内次之，在枝晶间最小.在所有这些区域中，试验温度较高者的γ’定向粗化程度较大；各试件在持久试验后，γ形成元素W，Cr和Co，γ’形成元素Al和Ta，在原始树枝状晶结构中呈一定规律分布，分析了合金元素再分布对γ’定向粗化的贡献，试验温度、应力和时间与元素分布比的关系，以及元素分布比对持久寿命的影响
In the range of 760-1050 ℃ and 750-140MPa, we selected the different temperature and stress of the CMSX-2 alloy for a long-term tensile fracture to rupture, observed the original specimen dendrites various regions (dendrites dry, dendritic arm and Dendrite intergranular) γ ’phase of the directional coarsening and the distribution of alloying elements The results show that the extent of γ’ roughening in the dendritic dry maximum, second in the dendrite arm, the smallest among the dendrites in In all of these areas, γ ’directional coarseness was higher for those with higher test temperatures. After long-term tests on each specimen, the γ-forming elements W, Cr and Co, γ’ formed the elements Al and Ta, The contribution of the alloying element redistribution to γ ’directional coarsening was analyzed. The relationship between the experimental temperature, stress and time and the element distribution ratio and the influence of elemental distribution ratio on the longevity of life