研究了1253K，350MPa拉伸蠕变过程中[001]，[110]和[111]取向镍基单晶高温合金CMSX－4基体相γ和析出相γ’的演变方式及相尺寸的变化规律比较了不同取向单晶试样中γ和γ’特征尺寸的变化对蠕变应变量和应变速率的影响结果表明，沿γ’定向粗化方向上γ基体通道宽度（即相邻γ’的间距）的变化速率对蠕变应变量和应变速率的影响较为明显．根据不同取向试样中γ基体通道的演变规律和塑性变形机制综合分析了蠕变各向异性行为。
The Evolutional manners and dimensional rules of γmatrix and γ'precipitates in the [001], [110] and [111] oriented specimens of nickel-base single crystal superalloy CMSX-4 during the tensile creep at 1253 K and 350 MPa were studied.The effects of the change in characteristic dimensions of γand γ' phases on the strain and strain rate were compared for the differently oriented single crystal specimens.It was found that the effect of change in mean width of γchannels along the direction of directional coarsening of γ' precipitates(the lamella spacings between adjacent rafted γ'precipitates)on the strain and strain rate is remarkable. Based on the evolutional rule of γchannels and the plastic deformation mechanisms, the anisotropic creep behaviour in the tested specimens was synthetically analyzed.
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