Twip公司
材料科学
延伸率
TRIP钢
极限抗拉强度
可塑性
奥氏体
冶金
打滑(空气动力学)
铁氧体(磁铁)
晶体孪晶
复合材料
微观结构
热力学
物理
作者
Z.C. Li,Zhiping Cai,R.D.K. Misra
标识
DOI:10.1016/j.msea.2016.11.101
摘要
In the present study, we fundamentally explore the reasons underlying mechanical property variation in hot-rolled 11Mn transformation-induced plasticity (TRIP) steels with varying Al-content. With increase in Al-content, the ultimate tensile strength (UTS) was decreased, while total elongation (TE) was increased. The variation in UTS was mainly associated with the fraction of constituent phases and stability of austenite, while the increase in total elongation (TE) with increase in Al-content was related to the increase in the fraction of ferrite. Moreover, the Al-free steel, quenched from intercritical region experienced brittle fracture. When the Al-content was increased to 2 wt%, the total elongation increased to ~22–32% and is also attributed to TRIP effect. In 4Al steel, the tensile elongation was in the range of ~19–40%, and was associated with TRIP effect and cooperative dislocation slip. In 6Al steel, the cumulative contribution of transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), and cooperative deformation of δ-ferrite led to high elongation of ~37–65%. The increase in the contribution of TRIP and TWIP with increase in Al-content led to dramatic change in the mode and characteristics of fracture.
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