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Austenite/ferrite interface movement during intercritical annealing of a medium Mn steel
Materials Science and Technology ( IF 1.8 ) Pub Date : 2021-07-05 , DOI: 10.1080/02670836.2021.1944537
M. K. Bai 1 , D. P. Yang 1 , G. D. Wang 1 , J. H. Ryu 2 , K. Y. Lee 2 , R. D. K. Misra 3 , H. L. Yi 1
Affiliation  

The austenite/ferrite interface movement during intercritical annealing of 0.15C–8.0Mn–2.1Al (wt-%) steel was simulated by DICTRA software under local equilibrium and then confirmed experimentally. The simulation results show that the austenite volume fraction exceeds the thermodynamic equilibrium amount during isothermal annealing and then decreases because the interface returns from ferrite to austenite. The reverse interface movement is verified in simulated batch annealing experiment for the first time by ex-situ determining the austenite volume fraction using characterisation of XRD as well as by in-situ measuring the bulk volume change led by phase transformation using dilatometric curves.



中文翻译:

中锰钢临界区退火过程中的奥氏体/铁素体界面运动

在 0.15C–8.0Mn–2.1Al (wt-%) 钢的临界间退火过程中,奥氏体/铁素体界面运动由 DICTRA 软件在局部平衡下模拟,然后通过实验证实。模拟结果表明,等温退火过程中奥氏体体积分数超过热力学平衡量,然后由于界面从铁素体返回到奥氏体而减少。通过使用 XRD 表征异位确定奥氏体体积分数以及使用膨胀曲线原位测量相变导致的体积变化,首次在模拟批量退火实验中验证了反向界面运动。

更新日期:2021-08-05
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