Body-centered-cubic to face-centered-cubic phase transformation of iron under compressive loading along 100 direction

HX Xie and T Ma and T Yu and FX Yin, MATERIALS TODAY COMMUNICATIONS, 26, 101961 (2021).

DOI: 10.1016/j.mtcomm.2020.101961

Phase transformation of iron nanoplate and bulk under compressive loading along 100 direction is investigated by using the molecular dynamic simulation method. The simulation results show that the iron nanoplate undergoes body-centered-cubic to face-centered-cubic phase transformation; while iron bulk undergoes bodycentered-cubic to hexagonal close-packed phase transformation. The two different phase transformation modes can be attributed to the free surface-induced stress effect of the nanoplate. By applying additional lateral stress, the iron bulk also transforms into face-centered-cubic phase. Moreover, the body-centered-cubic to face-centered-cubic phase transformation is further studied in term of elastic stability theory; it is found that the theoretical results are consistent with the simulation results very well. Therefore, it can be concluded that body-centered-cubic to face- centered-cubic phase transformation can be realized under both tensile and compressive loading along 100 direction.

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