30%Cr-Cu复合材料热变形及动态再结晶临界条件

耿昊; 朱顺新; 刘勇

doi:10.13801/j.cnki.fhclxb.20161104.001

30%Cr-Cu复合材料热变形及动态再结晶临界条件

耿昊¹,
朱顺新²,
刘勇^2,3,

1.
中国船舶重工集团公司第七一三研究所, 郑州 450015;
2.
河南科技大学材料科学与工程学院, 洛阳 471023;
3.
有色金属共性技术河南省协同创新中心, 洛阳 471023

基金项目: 国家自然科学基金（51101052）；河南省高校重点科研项目（15A430006）

详细信息

通讯作者:
刘勇,博士、教授,博士生导师,研究方向为功能铜合金领域E-mail:liuyong@haust.edu.cn

中图分类号: TB331
计量
- 文章访问数: 01074
- HTML全文浏览量: 055
- PDF下载量: 0992
出版历程
- 收稿日期: 2016-08-21
- 修回日期: 2016-10-19
- 刊出日期: 2017-06-14

Hot deformation and critical conditions of dynamic recrystallization of the 30%Cr-Cu composites

1.
The 713th Research Institute of China Shipbuilding Industry Corporation, Zhengzhou 450015, China;
2.
School of Materials Science and Engineering, He'nan University of Science and Technology, Luoyang 471023, China;
3.
Collaborative Innovation Center of Nonferrous Metals, He'nan Province, Luoyang 471023, China

摘要

摘要: 采用放电等离子烧结法（SPS）制备出30%Cr-Cu复合材料，对其致密度、硬度和导电率等相关性能进行测试，并观察分析该复合材料的显微组织。利用Gleeble-1500D型热模拟试验机在变形温度650~950℃、应变速率0.001~10 s^-1、变形量60%的条件下对30%Cr-Cu复合材料进行热模拟压缩试验。对热压缩试验得到的真应力-应变数据进行拟合、计算和分析，构建该复合材料的本构方程，同时得到材料的加工硬化率 θ，利用材料的ln θ-ε 曲线出现有拐点和-∂（ln θ ）/∂ε-ε 曲线对应有最小值这一判据，分析该复合材料的动态再结晶临界条件。结果表明：30%Cr-Cu复合材料的真应力-应变曲线主要以动态再结晶软化机制为特征，峰值应力随应变速率的增加和温度的降低而升高；该复合材料的ln θ -ε 曲线出现拐点，-∂（ln θ ）/∂ε -ε 曲线对应有最小值，该最小值所对应的应变为临界应变 ε_c，且 ε_c随变形温度的升高和应变速率降低而减小，ε_c与Zener-Hollomon参数 Z 的函数关系为 ε_c=2.38×10^-3 Z^0.1396。
- 30%Cr-Cu复合材料 /
- 本构方程 /
- 加工硬化率 /
- 动态再结晶 /
- 临界条件
Abstract: 30%Cr-Cu composites were prepared by spark plasma sintering process (SPS). The basic properties of the composite such as relative density, Brinell hardness and electrical conductivity were tested and the microstructures of the composites were observed. Hot simulation compression tests of the 30%Cr-Cu composites were conducted at deformation temperature of 650-950℃, strain rate of 0.001-10 s^-1 and deformation amount of 60% by the Gleeble-1500D thermal-mechanical simulation test machine. The true stress-true strain data of the 30%Cr-Cu composites were fitted, calculated and analyzed, constitutive equation of the composites was constructed, and the work hardening rate θ of the 30%Cr-Cu composite was obtained at the same time. The critical conditions of dynamic recrystallization during hot deformation of the 30%Cr-Cu composites were analyzed by computing the inflection point criterion of ln θ-ε curves and the minimum value criterion of -∂(ln θ)/∂ε-ε curves. The results show that the true stress-strain curves of the 30%Cr-Cu composites are mainly characterized by dynamic recrystallization softening mechanism. The peak stress increases with the increasing strain rate and the decreasing deformation temperature. The inflection point presents in the ln θ-ε curve and a minimum value appeas in the corresponding -∂(ln θ)/∂ε-ε curve when the critical state of the 30%Cr-Cu composites is attained, in which the strain that relates to the minimum value is the critical strain ε_c. The critical strain ε_c decreases with the increasing deformation temperature and the decreasing strain rate. The model of the critical strain with ε_c and Zener-Hollomon parameter can be described by the function of ε_c=2.38×10^-3 Z^0.1396.
- 30%Cr-Cu composites /
- constitutive equation /
- work hardening rate /
- dynamic recrystallization /
- critical condition

HTML全文

参考文献(0)

施引文献(15)

期刊类型引用(8)

1.	刘伟，杨继，袁春辉，夏旭，张锦光. 不同温度下碳纤维复合材料-钢胶接界面黏结性能研究. 复合材料科学与工程. 2025(03): 39-45+70 . 百度学术
2.	邵家儒，刘牛，杨瑜，郑子君. CFRP复合材料构件胶接特性及失效规律研究. 应用力学学报. 2023(05): 1058-1067 . 百度学术
3.	陈旭，曹亚周，崔健，葛继文. 碳纤维复合材料车体地板长大型材粘接工艺研究及装备设计. 机械. 2022(11): 63-69 . 百度学术
4.	陈卓异，彭彦泽，李传习，郭靖. 高温下双搭接钢-CFRP板胶粘界面力学性能试验. 复合材料学报. 2021(02): 449-460 . 本站查看
5.	李传习，李游，贺君，刘一鸣，彭彦泽. 固化剂对室温胶黏CFRP板/钢板界面性能的影响. 建筑材料学报. 2021(02): 339-347 . 百度学术
6.	杨峰，陈玉龙，罗旺，史剑，贾林江，陈子光. TG800碳纤维/聚酰亚胺树脂复合材料带翻边开口圆柱壳机匣件高温气动载荷下的承载性能. 复合材料学报. 2021(07): 2184-2195 . 本站查看
7.	桑海涛，周昕. 暖通空调胶接结构搭接接头承载力优化研究. 中国胶粘剂. 2021(11): 51-54+72 . 百度学术
8.	李传习，李游，高有为，胡正，刘一鸣. 纳米SiO_2质量分数对胶粘碳纤维增强树脂复合材料板-钢搭接界面黏结性能的影响. 复合材料学报. 2020(10): 2619-2635 . 本站查看