Effect of Partitioning Temperature on Work Hardening Behavior of Q&P Steels
Study on the instantaneous n-value of 0.3C-1.5Mn-1.5Si steel subjected to 1-step quenching and partitioning process (Q&P) is presented. The result indicated that the curves of instantaneous n-value vs. true strain could be divided into three stages. First, the instantaneous n-value shows a rapid decrease, then a comparative stable stage was observed due to the TRIP phenomenon of retained austenite, at last the instantaneous n-value decreases sharply to zero when necking appearance. The relationship of instantaneous n-value and partitioning temperature (PT) was analyzed; n-value decreased along with the rise of PT due to a higher carbon concentration and lower volume fraction of retained austenite was obtained at higher PT which could influence the uniform elongation and the stability of retained austenite.
Jianzhong Wang and Jingang Qi
S. Zhu et al., "Effect of Partitioning Temperature on Work Hardening Behavior of Q&P Steels", Advanced Materials Research, Vols. 299-300, pp. 403-407, 2011