只有小裂纹扩展到足够长并钝化到足够宽，才能够影响主裂纹的扩展及其前端应力、应变的分布。
Only if this short crack extends long enough and blunted wide enough, can it affect the principal crack extension and the distribution of stress and plastic strain.
这些负号位错将移至裂纹顶端并使之钝化而留下一个无位错区或低位错密度区。
These negative dislocations seem to enter the crack tip and blunt it, resulting in a dislocation-free zone at the crack tip.
止裂后的裂纹尖端变得十分圆整。达到了钝化止裂的目的。
The curvature of crack tip increased after crack arresting, so the crack tip was passivated.
室温蠕变对裂纹扩展产生延滞的原因主要是裂纹闭合，同时裂尖钝化、裂纹偏折及形变诱发马氏体的形成也会起到一定的作用。
It turns out that crack closure is the main reason for retardation, and crack tip blunting, crack deflection and strain-induced martensite would reinforce it.
从整个试验所得的效果来看，将来应用电沉积技术来钝化甚至愈合混凝土的裂纹是一种行之有效的方法。
The results of whole experiment indicate that applying electro-deposition technology will be an effective method of blunting crack tip and healing crack.
有一种合理的解释是说腐蚀能够去掉并钝化微裂纹。
One reasonable explanation is that etching removes and blunts microcracks.
结果表明：萌生后的热疲劳裂纹优先在硬质相中扩展，遇到钢基体相后受阻、钝化。
The results show that the thermal fatigue cracks after forming propagate preferentially in the hard phase, and the propagation of crack is stoped and dulled when it meet steel basic phase.
结果表明：萌生后的热疲劳裂纹优先在硬质相中扩展，遇到钢基体相后受阻、钝化。
The results show that the thermal fatigue cracks after forming propagate preferentially in the hard phase, and the propagation of crack is stoped and dulled when it meet steel basic phase.
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