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.