由于近代机器制造工业的迅速发展,人们对试样和机器构件的尺寸及表面状态对其机械性能影响的问题进行了广泛深入的研究,并得到了一些有意义的结果。金属材料强度的比例尺因素或称为缩尺效应问题是其中一个重要的课题,而解释缩尺效应的统计理论则是一个具有很大适用价值的理论。但是,在这方面一系列的工作中,镁合金的研究结果还少见。为 Due to the rapid development of modern machinery manufacturing industry, people have conducted extensive and in-depth studies on the influence of the size and surface state of the sample and the mechanical components on the mechanical properties, and obtained some meaningful results. The scale factor of the strength of metal materials or the problem of scale effect is one of the important topics, and the statistical theory to explain the scale effect is a theory of great value. However, a series of work in this area, the results of magnesium alloy is still rare. for