An Investigation on Microstructures and Mechanical Properties of Twinning-Induced Plasticity Steels Prepared by Directional Solidification

The mechanical behaviors and microstructural characteristics of three twinning-induced plasticity (TWIP) steels prepared using directional solidification at withdrawal rates of 3, 8, and 15 µms−1 (abbreviated as DS3, DS8, and DS15, respectively) were investigated. The results showed that all the samples solidified steadily in a cellular growth mode. The dendrite spacing decreased on increasing the withdrawal rate, but eliminated grains resulted...