The nonlinear unloading behavior of a typical Ni-based superalloy during hot deformation: a new elasto-viscoplastic constitutive model
The nonlinear unloading behavior of a typical Ni-based superalloy during hot deformation: a new elasto-viscoplastic constitutive model
复制标题
典型镍基高温合金热变形过程中的非线性卸载行为：一种新的弹粘塑性本构模型
DOI：
10.1007/s00339-016-0371-6
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Jian Chen
中科院分区：
文献类型：
--
作者：
Ming-Song Chen;Y.C. Lin;Kuo-Kuo Li;Jian Chen
在作者先前的工作中（Chen等人，在Appl Phys A.土井： 10.1007/s00339-016-0371-6 ，2016），通过中间卸载-再加载循环热压缩实验，研究了典型镍基高温合金的非线性卸载行为。详细讨论了卸载曲线的特征，提出了一种新的弹粘塑性本构模型来描述所研究的镍基高温合金的非线性卸载行为。然而，变形温度、应变速率、预应变与本构模型参数之间的函数关系尚需建立。本研究分析了变形温度、应变速率和预应变对作者前期工作（Chen et al. 2016）中提出的新本构模型参数的影响，提出了一个统一的弹粘塑性本构模型，用于预测任意变形温度、应变速率和预应变下的卸载行为。
In authors’ previous work (Chen et al. in Appl Phys A. doi: 10.1007/s00339-016-0371-6 , 2016), the nonlinear unloading behavior of a typical Ni-based superalloy was investigated by hot compressive experiments with intermediate unloading–reloading cycles. The characters of unloading curves were discussed in detail, and a new elasto-viscoplastic constitutive model was proposed to describe the nonlinear unloading behavior of the studied Ni-based superalloy. Still, the functional relationships between the deformation temperature, strain rate, pre-strain and the parameters of the proposed constitutive model need to be established. In this study, the effects of deformation temperature, strain rate and pre-strain on the parameters of the new constitutive model proposed in authors’ previous work (Chen et al. 2016) are analyzed, and a unified elasto-viscoplastic constitutive model is proposed to predict the unloading behavior at arbitrary deformation temperature, strain rate and pre-strain.