高锰TWIP钢层错能的研究进展

发布时间：2018-07-04 09:17

本文选题：TWIP钢 + 层错能　；参考：《钢铁研究学报》2015年01期

【摘要】：高锰TWIP钢的高强度、高塑性和高能量吸收能力与其堆垛层错能有关。TWIP效应对应的层错能上、下限值仍未统一,尤其是TWIP向MBIP(微带诱导塑性)转变的临界判据仍有待于深入分析。XRD、TEM和EAM是测定奥氏体层错能最常用的实验方法。同一TWIP钢的层错能及其变化规律存在实验方法的相关性。正规和亚正规溶液模型、Bragg-Williams模型和双亚点阵模型是计算高锰钢层错能的常见模型。对同一TWIP钢来说,不同模型的预测值并不相同,且与实测值也存在差异。铃木效应引起层错能随间隙原子浓度非线性变化,这在计算时是不能忽略的。规范实验方法、提高设备精度和完善热力学模型及其数据库有助于获得准确可靠的层错能值。
[Abstract]:The high strength, high plasticity and high energy absorption capacity of high manganese TWIP steel are related to the stacking fault energy. Especially, the critical criterion of TWIP to MBIP (microstrip induced plasticity) still needs to be further analyzed. XRDX TEM and EAM are the most commonly used experimental methods to measure the stacking fault energy of austenite. The stacking fault energy and its variation law of the same TWIP steel are correlated with experimental methods. Normal and subnormal solution models Bragg-Williams model and double sub-lattice model are common models for calculating stacking fault energy of high manganese steel. For the same TWIP steel, the predicted values of different models are different, and there are also differences between the predicted values and the measured values. The stacking fault energy caused by the Suzuki effect is nonlinear with the concentration of the interstitial atoms, which can not be ignored in the calculation. Standardizing the experimental method, improving the precision of the equipment and perfecting the thermodynamic model and its database are helpful to obtain accurate and reliable stacking fault energy.
【作者单位】：北京科技大学钢铁冶金新技术国家重点实验室;北京科技大学冶金与生态工程学院;
【基金】：北京科技大学钢铁冶金新技术国家重点实验室的资助项目(编号41603013)
【分类号】：TG142.1

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