摘要
Twinned substructure in lath martensite was induced in the interstitial free(IF)steel via a high pressure thermal cycle(heating up to 1100℃and holding for 30 min,cooling at 10℃/s to room temperature under a pressure of 4 GPa).Experimental observations and theoretical simulation confrm that the twinned substructure has the origin related to the twinned variants rather than the bcc{112}<111>twins,while extra difraction spots were caused by crystal overlapping rather than any extra phase.The diferences in crystallography and electron difraction behavior between twinned variants and{112}<111>twins were discussed in detail.
基金
supported by the Natural Science Foundation-Steel and Iron Foundation of Hebei Province(No.E2021203051)
the Hundred Outstanding Creative Talents Projects in Universities of Hebei Province,China
the Project Program of Heavy Machinery Collaborative Innovation Center,China.
