Combined modelling and miniaturised characterisation of high-temperature forging in a nickel-based superalloy
Combined modelling and miniaturised characterisation of high-temperature forging in a nickel-based superalloy
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DOI：
10.1016/j.matdes.2018.09.048
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发表时间：
2018-12-15
影响因子：
8.4
通讯作者：
Barba, D.
中科院分区：
文献类型：
--
作者：
Alabort, E.;Reed, R. C.;Barba, D.
连续体模型和小型化实验用于阐明镍基高温合金 Inconel 903 的高温可锻性。单轴压缩高温试验可以推导变形过程的表观活化能和应变率敏感性，并提出一个统一的本构模型来捕获变形的基础物理现象。然后使用金相分析来阐明变形过程中出现的微观结构的变化；提出了定义高温压缩期间晶粒尺寸和再结晶变化的微观结构演化模型。双锥体试样的小型化锻造实验验证了在不同温度和变形率下的相关锻造条件下的建模方法。最后，对这种材料在工业相关制造场景（涡轮盘的锻造过程）中的变形行为进行了数值研究。 (C) 2018 年由爱思唯尔有限公司出版。
Continuum models and miniaturised experiments are used to elucidate the high-temperature forgeability of the Ni-based superalloy Inconel 903. Uniaxial compression high temperature tests allow the derivation of an apparent activation energy and the strain rate sensitivity of the deformation process, and to propose a unified constitutive model that captures the underlying physics of deformation. Metallographic analysis is then used to elucidate changes in microstructure which arise during the deformation process; microstructure evolution models which define the changes in grain size and recrystallisation during high temperature compression are proposed. Miniaturised forging experiments in double-cone specimens validate the modelling approach under relevant forging conditions at different temperatures and deformation rates. Finally, the deformation behaviour of this material in an industrially relevant manufacturing scenario - the forging process of a turbine disc - is studied numerically. (C) 2018 Published by Elsevier Ltd.