退火温度对纳米晶铜微观结构和力学性能的影响  

Influence of Annealing Temperature on Microstructure and Mechanical Properties of Nanocrystalline Copper

作　　者：刘林波 陈佳文 沈喜训 LIU Linbo;CHEN Jiawen;SHEN Xixun(Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Engineering Research Center of Heat-Exchange System and Energy Saving,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学上海市电力材料防护与新材料重点实验室,上海200090 [2]上海电力大学上海热交换系统节能工程技术研究中心,上海200090

出　　处：《机械工程材料》2022年第8期22-27,共6页Materials For Mechanical Engineering

摘　　要：采用电沉积法制备得到厚度约600μm的块体纳米晶铜,并在100~250℃下进行退火处理,研究了退火温度对纳米晶铜微观结构和力学性能的影响。结果表明:未退火及退火后纳米晶铜均呈现面心立方结构;随着退火温度从100℃增加至250℃,纳米晶铜(200)晶面的衍射峰强度逐渐增强。随着退火温度的升高,纳米晶铜的抗拉强度逐渐减小,断后伸长率先增大后减小,表面拉伸变形带和拉伸断口上大而深的韧窝数量均增加;200℃退火后纳米晶铜的拉伸性能较佳,抗拉强度高约500 MPa,断后伸长率近30.5%。Bulk nanocrystalline copper with a thinkness of about 600 μm was prepared by electrodeposition, and then was annealed at 100-250 ℃. The effect of the annealing temperature on the microstructure and mechanical properties of the nanocrystalline copper was studied. The results show that both unannealed and annealed nanocrystalline copper showed a face-centered cubic structure. As the annealing temperature rose from 100 ℃ to 250 ℃, the diffraction peak intensity of(200) crystal faces of the nanocrystalline copper gradually increased. With the increase of annealing temperature, the tensile strength of the nanocrystalline copper gradually decreased while the elongation after fracture increased first and then decreased;and the numbers of both the surface tensile deformation zones and the large and deep dimples on the tensile fracture increased. The nanocrystalline copper had the relatively good tensile properties after annealing at 200 ℃, with the tensile strength up to about 500 MPa and the elongation after fracture of nearly 30.5%.

关 键 词：电沉积 热处理 力学性能 应变硬化 

分 类 号：TH142[一般工业技术—材料科学与工程]