热冲击疲劳裂纹的形成与微孔洞的形核、长大和连通有关。
The crack formation of thermal shock fatigue is related to the nucleation, growth and join of microvoid.
氮化钛膜层表面呈胞状结构生长，膜层结构致密，未见显微孔洞和裂纹的存在。
The TiN surface film grow as cell-shaped structure and the film microstructure is compact.
同时研究发现了钢丝在拉拔方向上形成的以第二相硬质颗粒为核心的梭形微孔洞。
The results also presented that there were so many shuttle-shaped micro holes in this steel wires, lugging along drawing axis and cored by the hard particles.
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