During healing the zigzag disappeared and crack boundary passivated .

在实验中，观察到 锯齿 状内 裂面的逐渐消失、退化现象及高温显微镜下 裂纹边界棱角的钝化现象。

Micro crack was initiated at extrusion ridge and grew along it in Zigzag . The crack was transgranular .

TC4钛合金沿孪晶界发生“挤出”，微 裂纹沿挤出脊形成，并沿孪晶界 按 Z 字形 扩展。

It is shown that the zigzag grain boundary may delay the initiation growth and propagation of crack as well as may also influence the crack morphology and the fracture mode markedly .

研究表明， 弯曲 晶界对 裂纹的萌生、长大及扩展，对裂纹的形态及断裂方式，都有显著的影响。