We also analyse the relationship between crack growth track and fractography.Thereforde, it is significant for studying the fatigue property of the steel used and its fatigue analy...

• 本文还对裂纹扩展途径与断口形貌之间的关系进行了分析,对进一步研究低温用钢的疲劳特性和低温下工程结构的失效分析具有重要意义。