A Transmission Kikuchi Diffraction Study of a Cold-Rolled and Annealed Fe-17Mn-2Si-3Al-1Ni-0.06C wt% Steel

作者：Gazder Azdiar A^*; Saleh Ahmed A; Nancarrow Mitchell J B; Mitchell David R G; Pereloma Elena V

来源：Steel Research International, 2015, 86(10): 1204-1214.

DOI：10.1002/srin.201500089

• transmission Kikuchi diffraction (TKD)
• transformation-induced plasticity (TRIP)
• twinning-induced plasticity (TWIP)
• steel
• martensite

This study applies the recently developed transmission Kikuchi diffraction technique to investigate the microstructures and micro-textures of a multi-phase Fe-17Mn-3Al-2Si1Ni-0.08C wt% steel that concurrently exhibits twinning-and transformation-induced plasticity effects. The steel was cold rolled to 66% thickness reduction and subsequently annealed at 625 degrees C for 300 s. The cold-rolled microstructure mainly consisted of alpha martensite interspersed with blocky epsilon martensite and remanent nanometer-sized grains of gamma. Annealing at 625 degrees C led to the partial transformation of alpha -> gamma and the reversion of epsilon -> gamma such that the microstructure comprised predominant nanometer-sized gamma grains interspersed with a smaller alpha phase and a trace fraction of nanometer-sized epsilon along gamma grain boundaries. During deformation via cold rolling and reverse transformation during annealing, micro-texture analysis indicated the operation of the Shoji-Nishiyama, Kurdjumov-Sachs, and Burgers ORs between g gamma <-> epsilon, and epsilon <-> alpha, respectively.

• 出版日期2015-10