1. These lath martensite first nucleates in parent austenite intergranular and twin boundary. 应变诱发马氏体首先在原奥氏体晶界和孪晶界形核。
2. Tie-line and level-law calculations show that low-carbon ferrite nucleates and grows, leaving the remaining austenite richer in carbon. 由截线及杠杆定律分析可知,低碳铁素体成核并长大,剩下含碳量高的奥氏体。
3. Due to very high cooling rate, the nugget structure rapidly nucleates and grows. The refined microstructure of the nugget with rapidly solidified characteristic is formed. 极大的冷却速率使得接头组织瞬间形核并快速生长,形成组织细小致密具有快速凝固特征的焊接接头。