| 10Ni8CrMoV钢热影响区的动态力学特征及其本构模型 |
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| 引用本文： | 张宝伟, 高珍鹏, 陈雪龙, 张由景, 宫旭辉, 董星. 10Ni8CrMoV钢热影响区的动态力学特征及其本构模型[J]. 材料开发与应用, 2022, 37(5): 68-72. |
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| 作者姓名： | 张宝伟 高珍鹏 陈雪龙 张由景 宫旭辉 董星 |
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| 作者单位： | 中国船舶集团有限公司第七二五研究所, 河南 洛阳 471023 |
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| 摘 要： | 使用热模拟试验机获得10Ni8CrMoV钢热影响区类似组织,通过霍普金森压杆试验对热影响区试样的动态力学行为进行表征,并观察其微观组织。结果表明:在高应变速率下,热影响区真实应力随着应变率的增加而增加,表现出明显的应变率强化效应;应变速率为2 000 s-1时,试样中出现大量的变形孪晶,应变速率为4 000 s-1时,试样被剪切破坏;基于Johnson Cook模型,得到10Ni8CrMoV钢热影响区动态本构模型。
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| 关 键 词： | 热影响区 热模拟试验机 霍普金森压杆试验 Johnson Cook模型 |
| 收稿时间： | 2022-04-11 |
Dynamic Mechanical Characteristics and Constitutive Model of the 10Ni8CrMoV Steel HAZ |
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| ZHANG Baowei, GAO Zhenpeng, CHEN Xuelong, ZHANG Youjing, GONG Xuhui, DONG Xing. Dynamic Mechanical Characteristics and Constitutive Model of the 10Ni8CrMoV Steel HAZ[J]. Development and Application of Materials, 2022, 37(5): 68-72. |
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| Authors: | ZHANG Baowei GAO Zhenpeng CHEN Xuelong ZHANG Youjing GONG Xuhui DONG Xing |
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| Affiliation: | Luoyang Ship Material Research Institute, Luoyang 471023, China |
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| Abstract: | Similar structures in the heat affected zone of 10Ni8CrMoV steel are obtained using a thermal simulation tester, and the dynamic mechanical behavior of the heat affected zone specimens are characterized by the Hopkinson Bar, and its microstructure are observed. The results show that under the high strain rate, the real stress of the heat affected zone increases with the increase of strain rate, showing obvious strain rate strengthening effect. At a strain rate of 2 000 s-1, a large number of deformed twins appear in the specimen, and the specimen is sheared at a strain rate of 4 000 s-1. Based on the Johnson-Cook model, a dynamic constitutive model of the heat affected zone of 10Ni8CrMoV steel is obtained. |
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| Keywords: | heat affected zone thermal analog test machine Hopkinson bar Johnson-Cook model |
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