| 时效强化高镍合金Inconel-718的高温弹塑性特征及本构模型 |
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| 引用本文： | 屈华鹏,王留兵,王东辉,吴冰洁,冯翰秋,许斌,宋丹戎,郎宇平.时效强化高镍合金Inconel-718的高温弹塑性特征及本构模型[J].金属热处理,2021,46(8):1-7. |
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| 作者姓名： | 屈华鹏 王留兵 王东辉 吴冰洁 冯翰秋 许斌 宋丹戎 郎宇平 |
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| 作者单位： | 1.钢铁研究总院 特殊钢研究所, 北京 100081;2.中国核动力研究设计院 核反应堆系统设计技术重点实验室, 四川 成都 610200 |
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| 基金项目： | 国家重点研发计划(2016YFB0300202) |
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| 摘 要： | 研究了核反应堆弹簧材料用0Cr20Ni55Mo3Nb5Ti(Inconel-718)镍基合金材料时效强化状态下在150~650 ℃范围内的高温弹塑性特征,并采用多种函数模型对其高温应力-应变实测数据进行了本构关系拟合计算和对比。结果表明:经过970 ℃×1 h,空冷+720 ℃×8 h,炉冷+620 ℃×8 h,空冷的三步法时效强化处理后,Inconel-718合金兼具较高的Rp0.01值和室温伸长率。Boltzmann函数模型对时效强化Inconel-718合金材料在1.5%应变范围内的高温σ-ε实测数据具有良好的拟合效果和预测计算精度,适用于核反应堆弹簧材料的选材和结构设计。
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| 关 键 词： | 时效强化 Inconel-718合金 弹塑性特征 本构模型 |
| 收稿时间： | 2021-03-18 |
High-temperature elastic-plastic characteristics and constitutive model of aging strengthened high-nickel alloy Inconel-718 |
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| Qu Huapeng,Wang Liubing,Wang Donghui,Wu Bingjie,Feng Hanqiu,Xu Bin,Song Danrong,Lang Yuping.High-temperature elastic-plastic characteristics and constitutive model of aging strengthened high-nickel alloy Inconel-718[J].Heat Treatment of Metals,2021,46(8):1-7. |
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| Authors: | Qu Huapeng Wang Liubing Wang Donghui Wu Bingjie Feng Hanqiu Xu Bin Song Danrong Lang Yuping |
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| Affiliation: | 1. Institute of Special Steel, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu Sichuan 610200, China |
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| Abstract: | High-temperature elastic-plastic characteristics from 150 ℃ to 650 ℃ of aging strengthened 0Cr20Ni55Mo3Nb5Ti (Inconel-718) nickel-based alloy used for nuclear reactor spring were researched, and various functional models were used to fitting calculation and comparison of the constitutive relations based on the measured stress-strain data at high temperature. The results show that higher Rp0.01 value and room temperature elongation of the Inconel-718 alloy are obtained after 3-steps heat treatment of 970 ℃×1 h, air cooling+720 ℃×8 h, furnace cooling+620 ℃×8 h, air cooling. It is found that Boltzmann model has good fitting effect and prediction calculation precision for high-temperature σ-ε constitutive relations of the aging strengthened Inconel-718 alloy, so that it is also appropriate for the structure design and material selection for nuclear reactors. |
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| Keywords: | aging strengthening Inconel-718 alloy elastic-plastic characteristics constitutive model |
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