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| Monel400合金热压缩变形流变应力本构方程 |
| Flow Stress Constitutive Equation of Monel400 Alloy during Hot Compression |
| Received:March 20, 2018 Revised:July 10, 2018 |
| DOI：10.3969/j.issn.1674-6457.2018.04.021 |
| 中文关键词: Monel400合金 流变应力 双曲正弦函数 回归分析 本构方程 |
| 英文关键词: Monel400 alloy flow stress hyperbolic sine function regression analysis constitutive equation |
| 基金项目: |
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| 中文摘要: |
| 目的 研究Moenl400合金的热变形流变行为，确定合金热压缩变形的流变应力本构方程。方法 在Gleeble1500热模拟机上对Ni-Cu固溶体单相合金Monel400进行等温热压缩实验，研究Monel400合金在变形温度为1173~1423 K、应变速率为0.01~10 s-1时的流变应力；Monel400合金的本构模型为含有Zener- Hollomon参数的双曲正弦函数模型，通过回归分析获得了材料常数Q, ln A, n, α与真应变ε的关系；并对不同变形条件下的实测值与计算值进行对比。结果 Moenl400合金的流变应力随温度的升高和应变速率的降低而降低；Moenl400合金流变应力的计算值与实验值吻合较好。结论 通过计算得到的本构模型能够较好地表征Monel400合金的高温流变特性。 |
| 英文摘要: |
| The paper aims to study the hot deformation behaviors of Monel400 alloy and establish its constitutive equation of flow stress during thermal compression deformation. The hot compression tests of Ni-Cu solid solution single-phase alloy Monel400 were conducted at deformation temperature of 1173~1423 K and the strain rate of 0.01~10 s−1 on a Gleeble-1500 thermal simulator. The constitutive equation of Monel400 alloy was represented by Zener-Hollomon parameter in a hyperbolic sine function, the relationship between material constant Q, ln A, n, α and ε were evaluated by regression analysis. The comparison between the experimental and the calculated data under various processing conditions were provided. The flow stress decreased with the increase of deformation temperature and the decrease of strain rate. The flow stress calculated by the constitutive equation agreed well with the experimental values. Therefore, the developed constitution equations can be used to predict the high temperature flow behavior characteristic of Monel400 alloy. |
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