基于Murty失稳判据的Cu-9Ni-6Sn-0.04Cr合金热加工行为

doi:10.13251/j.issn.0254-6051.2023.10.016

金属热处理 ›› 2023, Vol. 48 ›› Issue (10): 116-122.DOI: 10.13251/j.issn.0254-6051.2023.10.016

基于Murty失稳判据的Cu-9Ni-6Sn-0.04Cr合金热加工行为

宋涛¹, 许斯洋¹, 李英龙^1,2, 丁桦^1,2

1.东北大学材料科学与工程学院, 辽宁沈阳 110819;
2.东北大学辽宁省轻量化用关键金属结构材料重点实验室, 辽宁沈阳 110819

收稿日期:2023-05-27 修回日期:2023-08-19 出版日期:2023-10-25 发布日期:2023-12-07
通讯作者: 李英龙,教授,博士生导师,E-mail:liyl@smm.neu.edu.cn
作者简介:宋涛(1996—),女,硕士研究生,主要研究方向为铜合金材料,E-mail:mr_tao321@163.com。

Hot processing behavior of Cu-9Ni-6Sn-0.04Cr alloy based on Murty's instability criterion

Song Tao¹, Xu Siyang¹, Li Yinglong^1,2, Ding Hua^1,2

1. School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China;
2. Key Lab of Lightweight Structural Materials of Liaoning Province, Northeastern University, Shenyang Liaoning 110819, China

Received:2023-05-27 Revised:2023-08-19 Online:2023-10-25 Published:2023-12-07

摘要/Abstract

摘要： 以新型Cu-9Ni-6Sn-0.04Cr铜合金为研究对象,采用MMS-200热模拟试验机,在变形温度750~900 ℃,应变速率0.01~10 s^-1条件下进行单道次热压缩试验,探究不同变形温度和应变速率对Cu-9Ni-6Sn-0.04Cr铜合金峰值流变应力的影响,并用Prasad和Murty两种失稳判据对Cu-9Ni-6Sn-0.04Cr铜合金进行热加工图分析。结果表明,Murty失稳判据计算所得热加工图更适合Cu-9Ni-6Sn-0.04Cr铜合金,计算所得失稳区为750~900 ℃,0.1~10 s^-1,与该合金实际热压缩后的失稳分布基本相符。此外,合金在失稳区的高速变形区由于混晶组织的出现造成失稳,在低温低速变形区由于链状结构的出现造成失稳。

关键词: 铜合金, Cu-9Ni-6Sn-0.04Cr合金, 热变形行为, 热加工图, 失稳行为

Abstract: Hot compression behavior of a new Cu-based alloy Cu-9Ni-6Sn-0.04Cr was investigated through single pass compressing tests on a MMS-200 thermal mechanical simulator in the temperature range of 750-900 ℃ and the strain rate of 0.01-10 s^-1, and the hot processing maps of the alloy were analyzed by using the Prasad's and Murty's instability criterion. The results show that the Murty's instability criterion is more suitable to establish the hot processing maps for the Cu-9Ni-6Sn-0.04Cr Cu-based alloy, of which the instability domain is 750-900 ℃, 0.1-10 s^-1, being consistent with the instability distribution of the alloy. Besides, the appearance of mixed grains makes instability occur in the high strain rate domain, while chain-like structure make instability happen in the low temperature and low strain rate domain for the Cu-9Ni-6Sn-0.04Cr Cu-based alloy.

Key words: copper alloy, Cu-9Ni-6Sn-0.04Cr alloy, hot deformation behavior, hot processing map, instability behavior

中图分类号:

TG146.11

宋涛, 许斯洋, 李英龙, 丁桦. 基于Murty失稳判据的Cu-9Ni-6Sn-0.04Cr合金热加工行为[J]. 金属热处理, 2023, 48(10): 116-122.

Song Tao, Xu Siyang, Li Yinglong, Ding Hua. Hot processing behavior of Cu-9Ni-6Sn-0.04Cr alloy based on Murty's instability criterion[J]. Heat Treatment of Metals, 2023, 48(10): 116-122.

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基于Murty失稳判据的Cu-9Ni-6Sn-0.04Cr合金热加工行为

Hot processing behavior of Cu-9Ni-6Sn-0.04Cr alloy based on Murty's instability criterion

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