Results Stress concentration was noted at the pedicle and posterosuperior part of the vertebral body near the pedicle.

结果椎弓根以及椎体后上方与椎弓根相邻部分为应力集中区域。

The crack initiates at stress concentration point in the root of weld, where has much more martenite, carbide and inclusion, and the serious hydrogen segregation.

裂纹均在焊缝根部应力集中处萌生，该处马氏体含量比较大，碳化物及夹杂物较多，氢的偏聚现象严重。