Carbon content-tuned martensite transformation in low-alloy TRIP steels.

Published on May 17, 2019in Scientific Reports3.998
· DOI :10.1038/S41598-019-44105-6
Yongfeng Shen24
Estimated H-index: 24
(NU: Northeastern University),
Xiuping Dong18
Estimated H-index: 18
(MOE: Chinese Ministry of Education)
+ 1 AuthorsN. Jia2
Estimated H-index: 2
(MOE: Chinese Ministry of Education)
Ultrahigh strength and good ductility are obtained for two low-alloy transformation-induced-plasticity steels fabricated by the quenching and partitioning (Q&P) processing, respectively. Compared to 0.19 wt.% C steel in which γ → α′-martensite transformation is the dominant mechanism under deformation, the relatively high C content of austenite in 0.47 wt.% C steel is responsible for the transformation from γ to e-martensite, suggesting that the transformation is not solely determined by the stacking fault energy. The study shows that during the Q&P process, strong and ductile steels with specific transformation procedures can be obtained by adjusting volume fraction and carbon content of the retained austenite.
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