时效强化高镍合金Inconel-718的高温弹塑性特征及本构模型

doi:10.13251/j.issn.0254-6051.2021.08.001

金属热处理 ›› 2021, Vol. 46 ›› Issue (8): 1-7.DOI: 10.13251/j.issn.0254-6051.2021.08.001

• 材料研究 • 下一篇

时效强化高镍合金Inconel-718的高温弹塑性特征及本构模型

屈华鹏¹, 王留兵², 王东辉², 吴冰洁², 冯翰秋¹, 许斌², 宋丹戎², 郎宇平¹

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

收稿日期:2021-03-18 出版日期:2021-08-25 发布日期:2021-12-09
作者简介:屈华鹏(1981—),男,高级工程师,博士,主要研究方向为不锈钢及耐蚀合金材料,E-mail:quhuapeng@nercast.com
基金资助:
国家重点研发计划(2016YFB0300202)

High-temperature elastic-plastic characteristics and constitutive model of aging strengthened high-nickel alloy Inconel-718

Qu Huapeng¹, Wang Liubing², Wang Donghui², Wu Bingjie², Feng Hanqiu¹, Xu Bin², Song Danrong², Lang Yuping¹

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

Received:2021-03-18 Online:2021-08-25 Published:2021-12-09

摘要/Abstract

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R_p0.01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。

关键词: 时效强化, Inconel-718合金, 弹塑性特征, 本构模型

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 R_p0.01 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.

Key words: aging strengthening, Inconel-718 alloy, elastic-plastic characteristics, constitutive model

中图分类号:

TG156.2

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.

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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时效强化高镍合金Inconel-718的高温弹塑性特征及本构模型

High-temperature elastic-plastic characteristics and constitutive model of aging strengthened high-nickel alloy Inconel-718

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