Meantime it finds out property change reason of coarse crystal area from welding coarse crystal area structure change and puts forward the direction of toughness.
同时，还从焊接粗晶区组织变化中找出了粗晶区性能变化的原因，并提出了韧化方向。
From the results of different area structure testings, the theoretical relationship between the accumulative failure rate and the product of area and defect density (AD) was verified.
从不同面积结构的测试结果验证了累积失效率f和面积A与缺陷密度d的乘积ad之间的关系。
From the results of different area structure testings, the theoretical relationship between the accumulative failure rate and the product of area and defect density (AD) was verified.
从不同面积结构的测试结果验证了累积失效率f和面积A与缺陷密度d的乘积ad之间的关系。
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