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冷轧变形量对Al2O3/Cu复合材料组织性能的影响

宋昊 国秀花 李韶林 宋克兴 徐国杨 齐柯柯 刘嵩

宋昊, 国秀花, 李韶林, 等. 冷轧变形量对Al2O3/Cu复合材料组织性能的影响[J]. 复合材料学报, 2024, 42(0): 1-11.
引用本文: 宋昊, 国秀花, 李韶林, 等. 冷轧变形量对Al2O3/Cu复合材料组织性能的影响[J]. 复合材料学报, 2024, 42(0): 1-11.
SONG Hao, GUO Xiuhua, LI Shaolin, et al. Effect of cold rolling deformation on microstructure and properties of Al2O3/Cu composites[J]. Acta Materiae Compositae Sinica.
Citation: SONG Hao, GUO Xiuhua, LI Shaolin, et al. Effect of cold rolling deformation on microstructure and properties of Al2O3/Cu composites[J]. Acta Materiae Compositae Sinica.

冷轧变形量对Al2O3/Cu复合材料组织性能的影响

基金项目: 中国博士后科学基金 (2020 T130172);河南省科技攻关项目 (222102230064);十四五预研项目
详细信息
    通讯作者:

    国秀花, 硕士生导师, 博士, 主要从事新型铜基材料开发及其载流摩擦学应用 E-mail: guoxiuhua@haust.edu.cn

  • 中图分类号: TB331

Effect of cold rolling deformation on microstructure and properties of Al2O3/Cu composites

Funds: China Postdoctoral Science Foundation(No.2020 T130172); Key R & D and promotion projects of Henan Province(No.222102230064);14 th Five-Year Pre-research Project
  • 摘要: 为进一步提升Al2O3/Cu复合材料的力学性能,本文采用内氧化法制备了Cu-0.57wt%Al2O3 复合材料,研究了不同冷轧变形量对Al2O3/Cu复合材料的显微组织、导电率、力学性能的影响,重点探讨了不同变形量下复合材料强化机制的贡献。结果表明:随着冷轧变形量的增加,Al2O3/Cu复合材料的晶粒逐渐变为细长纤维状结构,平均晶粒尺寸由2.82 μm(原始态)减小到0.56 μm(90%变形量)。随着冷轧变形量的增加,Al2O3/Cu复合材料力学性能逐渐提升,60%变形量时达到峰值,强度和硬度分别为544 MPa和156 HV,分别提升了35% 和14%,而导电率仅从85%IACS减小到83%IACS。这是由于冷变形过程中,纳米级Al2O3颗粒与位错交互作用逐渐增强,晶界强化和位错强化对强度的贡献逐渐增大,分别由160 MPa增加到264 MPa和47 MPa增加到141 MPa。当变形量超过60%时,晶粒尺寸(0.56 μm)与位错密度(3.5×1014 m−2)趋于稳定,位错强化与晶界强化对强度的贡献达到顶峰,力学性能最佳。

     

  • 图  1  Cu-0.57 wt% Al2O3复合材料制备示意图

    Figure  1.  Schematic diagram of Cu-0.57 wt% Al2O3 composites preparation

    图  2  不同冷轧变形量的Al2O3/Cu复合材料微观组织 (a) 0%;(b) 30%;(c) 60%;(d) 90%

    Figure  2.  Microstructure of Al2O3/Cu composites with different cold rolling deformations (a) 0%;(b) 30%;(c) 60%;(d) 90%

    图  3  不同冷轧变形量的Al2O3/Cu复合材料SEM图 (a)0%;(b)30%;(c)60%;(d)90%

    Figure  3.  SEM images of Al2O3 composites under different cold rolling deformations (a)0%;(b)30%;(c)60%;(d)90%

    图  4  不同冷轧变形量下Al2O3/Cu复合材料的XRD图谱

    Figure  4.  XRD pattern of Al2O3/Cu composites under different cold rolling deformations

    图  5  不同冷轧变形量下 Al2O3/Cu复合材料硬度与导电率变化曲线

    Figure  5.  Variation curves of hardness and electrical conductivity of Al2O3/Cu composites under different cold rolling deformations

    图  6  不同冷轧变形量下Al2O3/Cu复合材料的拉伸应力-应变曲线

    Figure  6.  Tensile stress-strain curves of Al2O3/Cu composites under different cold rolling deformation

    图  7  不同冷轧变形量下Al2O3/Cu复合材料的拉伸性能变化

    Figure  7.  Variation of tensile properties of Al2O3/Cu composites under different cold rolling deformations

    图  8  Al2O3/Cu复合材料的拉伸断口形貌(a) 0%;(b) 30%;(c) 60%;(d) 90%

    Figure  8.  Tensile fracture morphology of Al2O3/Cu composites (a) 0%;(b) 30%;(c) 60%;(d) 90%

    图  9  Cu-Al2O3复合材料TEM图像 (a)、(b)Cu/Al2O3复合材料微观组织形貌;(c)图(b)黄色区域FFT图像;(d)图(b)黄色区域IFFT

    Figure  9.  TEM images of Cu-Al2O3 composites (a) 、(b) Microstructure morphology of Cu/Al2O3 composites; (c) FFT image of the yellow area in Fig.(b); (d) IFFT image of the red area in Fig.(b);

    图  10  不同变形量下Al2O3/Cu复合材料中各强化机制贡献计算结果

    Figure  10.  Contribution percentage of each strengthening mechanism to the tensile strength of the Al2O3/Cu composites

    表  1  不同变形量下Al2O3/Cu复合材料的强化机制对抗拉强度的贡献

    Table  1.   Contribution of strengthening mechanism to tensile strength of Al2O3/Cu composites at different deformations

    Rolling reduction/%ρ/1014m−2σgb/MPaσor/MPaσdis/MPaTheoretical value /MPaMeasured value/MPaDeviation/%
    00.39160168473754036.9
    300.75192168654254648.5
    603.562641681415735435.5
    903.602621681425725445.1
    Notes: ρ is the dislocation density, σgb is the grain boundary strengthening, σor is the orowan strengthening, σdis is the dislocation strengthening.
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  • 收稿日期:  2024-01-11
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