Inconel 718高温合金等温压缩过程的组织演变及温度场模拟

doi:10.13251/j.issn.0254-6051.2023.05.024

金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 151-157.DOI: 10.13251/j.issn.0254-6051.2023.05.024

Inconel 718高温合金等温压缩过程的组织演变及温度场模拟

王超¹, 任永海¹, 韩森霖¹, 程治¹, 王龙祥¹, 赵飞², 谭元标²

1.贵阳安大宇航材料工程有限公司, 贵州贵阳 550009;
2.贵州大学材料与冶金学院贵州省材料结构与强度重点实验室, 贵州贵阳 550025

收稿日期:2022-10-20 修回日期:2023-03-16 出版日期:2023-05-25 发布日期:2023-06-21
通讯作者: 任永海,工程师,硕士,E-mail: yonghairen@163.com
作者简介:王超 (1974 —),男,工程师,硕士,主要研究方向为金属材料成形加工,E-mail: wang3007@andaaerospace.com。
基金资助:
贵阳市科技计划(筑科合同[2021]1-7号)

Microstructure evolution and temperature field simulation of Inconel 718 super alloy during isothermal compression

Wang Chao¹, Ren Yonghai¹, Han Senlin¹, Cheng Zhi¹, Wang Longxiang¹, Zhao Fei², Tan Yuanbiao²

1. Guiyang Andaiyuhang Material Engineering Co., Ltd., Guiyang Guizhou 550009, China;
2. Guizhou Key Laboratory of Materials Structure and Strength, College of Materials and Metallurgy, Guizhou University, Guiyang Guizhou 550025, China

Received:2022-10-20 Revised:2023-03-16 Online:2023-05-25 Published:2023-06-21

摘要/Abstract

摘要： 采用Gleeble 3800热压缩试验机、Deform-3D有限元软件和光学显微镜研究了Inconel 718高温合金在950～1150 ℃温度范围和应变速率0.1～10 s^-1范围内的组织演变和温度场模拟。结果表明,在低变形温度和高应变速率下,初始阶段随着应变的增加,流变应力迅速增加到峰值。达到峰值应力后,流变曲线呈现出明显的流变软化现象。在低变形温度、高应变速率下,产生的变形热较大,合金易于发生动态再结晶,且动态再结晶程度较高,晶粒尺寸较小。当应变速率降低,变形热也逐渐降低,合金内部动态再结晶的晶粒体积分数减少。在变形温度为1100 ℃和应变速率为0.1 s^-1时,合金发生完全动态再结晶。基于Deform-3D软件模拟的温度场分布结果可知,低变形温度、高应变速率的热变形条件会使合金内部产生较大的变形热,随着变形温度的升高和应变速率的降低,变形热的值逐渐减小。当变形温度和应变速率一定时,合金内的变形热会随真应变的增加而不断增加。

关键词: Inconel 718高温合金, 热变形, 动态再结晶, 温度场

Abstract: Microstructure evolution and temperature field simulation of the Inconel 718 superalloy in the temperature range of 950-1150 ℃ and strain rate range of 0.1-10 s^-1 were investigated by means of Gleeble 3800 thermal compression tester, Deform-3D finite element software and optical microscope. The results show that at low deformation temperature and high strain rate, the flow stress increases rapidly to the peak at the initial stage with the increase of deformation strain. After reaching the peak stress, the flow curve exhibits an obvious softening phenomenon. Also at low deformation temperature and high strain rate, the deformation heat is larger, leading to a fact that dynamic recrystallization is prone to occur in the deformed alloy, the dynamic recrystallization degree is higher, and the grain size is smaller. As the strain rate decreases, the deformation heat decreases gradually, and the volume fraction of dynamic recrystallization grains decreases. When deformed at 1100 ℃ and 0.1 s^-1, the full dynamic recrystallization occurs in the deformed alloy. Based on the results of the temperature field distribution simulated by Deform-3D software, it can be seen that the hot deformation conditions of low temperature and high strain rate will produce large deformation heat in the deformed alloy. With the increase of deformation temperature and the decrease of strain rate, the value of deformation heat gradually decreases. When the deformation temperature and strain rate are constant, the deformation heat in the alloy increases with the increase of true strain.

Key words: Inconel 718 superalloy, hot deformation, dynamic recrystallization, temperature field

中图分类号:

TG31

王超, 任永海, 韩森霖, 程治, 王龙祥, 赵飞, 谭元标. Inconel 718高温合金等温压缩过程的组织演变及温度场模拟[J]. 金属热处理, 2023, 48(5): 151-157.

Wang Chao, Ren Yonghai, Han Senlin, Cheng Zhi, Wang Longxiang, Zhao Fei, Tan Yuanbiao. Microstructure evolution and temperature field simulation of Inconel 718 super alloy during isothermal compression[J]. Heat Treatment of Metals, 2023, 48(5): 151-157.

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Inconel 718高温合金等温压缩过程的组织演变及温度场模拟

Microstructure evolution and temperature field simulation of Inconel 718 super alloy during isothermal compression

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