基于修正Voce模型的2A12铝合金流动应力模型

doi:10.13289/j.issn.1009-6264.2018-0544

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材料热处理学报 ›› 2019, Vol. 40 ›› Issue (6) : 170-176. DOI: 10.13289/j.issn.1009-6264.2018-0544

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材料模拟计算

基于修正Voce模型的2A12铝合金流动应力模型

陈学文, 张家银, 皇涛, 宋克兴, 朱红亮, 杜昱青

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Flow stress model of 2A12 aluminum alloy based on modified Voce model

CHEN Xue-wen, ZHANG Jia-yin, HUANG Tao, SONG Ke-xing, ZHU Hong-liang, DU Yu-qing

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摘要

在温度20~175℃、应变速率0.01~1 s^-1、变形量为50%条件下，采用Gleeble-1500 D热模拟试验机对2A12铝合金进行了压缩实验。结果表明：2A12铝合金在该变形条件下有明显软化效应，同一应变速率下，温度由20℃升高到175℃，材料峰值应力平均降低了60 MPa。采用考虑软化系数的Voce模型建立了2A12铝合金的流动应力模型，模拟得到的流动应力值与实验值的相关系数达到0.99。基于构建的流动应力模型，采用有限元模拟软件DEFORM-3D对2A12铝合金试样在温度为20℃、应变速率为0.1 s^-1的条件下进行了压缩模拟。通过对比相同变形条件下的实验与有限元模拟得到的行程载荷曲线，平均相对误差为4.78%，验证了所构建的流动应力模型的准确性，为2A12铝合金冷变形加工工艺的制定提供了理论依据。

Abstract

The compression test of 2A12 aluminum alloy was carried out with Gleeble-1500-D thermal simulator under the conditions of deformation temperature of 20-175 ℃, strain rate of 0.01-1 s^-1 and deformation of 50%. The results show that the 2A12 aluminum alloy has obvious softening effect under this deformation condition. At the same strain rate, the temperature increases from 20 ℃ to 175 ℃, the peak stress of the alloy decreases by 60 MPa on average. The flow stress model of the 2A12 aluminum alloy was established by using the Voce model with softening coefficient taken into account. The correlation coefficient between the simulated flow stress value and the experimental value is 0.99. Based on the established flow stress model, the finite element simulation software DEFORM-3D was used to simulate the compression of the 2A12 aluminum alloy samples under the conditions of deformation temperature of 20 ℃ and strain rate of 0.1 s^-1. The average relative error is 4.78% by comparing the travel load curve obtained under the same deformation condition with the finite element simulation, which verifies the accuracy of the established flow stress model. It provides a theoretical basis for the development of cold deformation processing technology of the 2A12 aluminum alloy.

导出引用

陈学文, 张家银, 皇涛, 宋克兴, 朱红亮, 杜昱青. 基于修正Voce模型的2A12铝合金流动应力模型[J]. 材料热处理学报, 2019, 40(6): 170-176 https://doi.org/10.13289/j.issn.1009-6264.2018-0544

CHEN Xue-wen, ZHANG Jia-yin, HUANG Tao, SONG Ke-xing, ZHU Hong-liang, DU Yu-qing. Flow stress model of 2A12 aluminum alloy based on modified Voce model[J]. Transactions of Materials and Heat Treatment, 2019, 40(6): 170-176 https://doi.org/10.13289/j.issn.1009-6264.2018-0544

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