(西北工业大学 力学与土木建筑学院，西安 710072)
摘 要: 通过随机抽样和统计的方法对定向凝固高温合金的弹性常数进行了分析。 结果表明： 由于合金晶粒数目较少，弹性常数统计结果的变异系数较大， 证实定向凝固高温合金横向性能分散性较大； 由抽样检验发现， 定向凝固高温合金的弹性常数统计上近似服从正态分布； 应该采用统计方法描述定向凝固合金的力学行为。
关键字: 定向凝固高温合金；横观各向同性； 弹性常数； 正态分布
（ School of Mechanics, Civil Engineering and Architecture,
Northwestern Polytechnical University, Xi'an 710072, China ）
Abstract: Directionally solidified superalloy's elastic constants were analyzed by employing statistical and random sampling methods. The results show that the coefficient of variation of elastic constants is fairly large because specimen has very few grains, which proves that the transverse elastic properties of directionally solidified superalloy present considerably scattered and satisfy normal distribution. The statistical analysis should be employed to describe directionally solidified superalloy's mechanical behavior.
Key words: directionally solidified superalloy; transverse-isotropic; elastic constants; normal distribution
