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SiCp/Al复合材料纳米压痕/划痕下的脆塑性行为研究

刘亚梅 王佳力 谷岩 吴爽 李震

刘亚梅, 王佳力, 谷岩, 吴爽, 李震. SiCp/Al复合材料纳米压痕/划痕下的脆塑性行为研究[J]. 金刚石与磨料磨具工程, 2024, 44(5): 607-620. doi: 10.13394/j.cnki.jgszz.2023.0165
引用本文: 刘亚梅, 王佳力, 谷岩, 吴爽, 李震. SiCp/Al复合材料纳米压痕/划痕下的脆塑性行为研究[J]. 金刚石与磨料磨具工程, 2024, 44(5): 607-620. doi: 10.13394/j.cnki.jgszz.2023.0165
LIU Yamei, WANG Jiali, GU Yan, WU Shuang, LI Zhen. Research of brittle-plastic behavior of SiCp/Al composites based on nano-indentation/scratch[J]. Diamond & Abrasives Engineering, 2024, 44(5): 607-620. doi: 10.13394/j.cnki.jgszz.2023.0165
Citation: LIU Yamei, WANG Jiali, GU Yan, WU Shuang, LI Zhen. Research of brittle-plastic behavior of SiCp/Al composites based on nano-indentation/scratch[J]. Diamond & Abrasives Engineering, 2024, 44(5): 607-620. doi: 10.13394/j.cnki.jgszz.2023.0165

SiCp/Al复合材料纳米压痕/划痕下的脆塑性行为研究

doi: 10.13394/j.cnki.jgszz.2023.0165
基金项目: 吉林省科技发展项目(20230201103GX)。
详细信息
    作者简介:

    刘亚梅,女,1970年生,硕士、教授。主要研究方向:机械电子工程/自由曲面精加工。E-mail:949823612@qq.com

    通讯作者:

    谷岩,男,1980年生,博士、副教授。主要研究方向:微纳制造与数控装备。E-mail:guyan@ccut.edu.cn

  • 中图分类号: TG58; TB333

Research of brittle-plastic behavior of SiCp/Al composites based on nano-indentation/scratch

  • 摘要: 为探究SiCp/Al复合材料中两相材料相互作用引起的力学性能差异,研究微观尺度下法向载荷变化对SiCp/Al复合材料形变和去除的影响。采用纳米压痕实验,基于Oliver-Pharr法测得其硬度和弹性模量,并对其压痕表面进行观察,结合有限元仿真分析产生力学性能差异的原因;同时,根据纳米压痕实验所得力学参数进行变载荷纳米划痕仿真,并配合实验后划痕表面观察结果分析材料的形变和脆塑性行为。结果表明:当金刚石压头作用于SiC颗粒时,颗粒出现破碎和二次压入现象,所测硬度与弹性模量小于单晶SiC的理论值;当金刚石压头作用于基体相时,由于SiC颗粒阻碍基体压入,复合材料的硬度与弹性模量测量结果偏大。在纳米划痕过程中,复合材料的去除形式随载荷变化体现为划擦、耕犁和切削阶段,其中的基体相通过塑性流动产生塑性脊堆积并伴随有涂覆现象,SiC颗粒则以脱黏、断裂破碎和拔出等脆性机制而去除,且SiC颗粒的二次压入、断裂、破碎和拔出是导致复合材料力学性能与单晶SiC的力学性能产生巨大差异的主要原因。随着划痕载荷增加,SiC体积分数为45 %的SiCp/Al复合材料的去除机制更多取决于以塑性去除为主的基体相,而SiC颗粒则主要表现为脆性去除。

     

  • 图  1  压痕仿真示意图

    Figure  1.  Schematic diagram of indentation simulation

    图  2  载荷-深度曲线与压痕截面轮廓

    Figure  2.  Load-depth curve and indentation cross-section profile

    图  3  纳米压痕设备与复合材料原始表面形貌

    Figure  3.  Nanoindentation equipment and original surface morphology of materials

    图  4  加载不同位置处的载荷-深度曲线

    Figure  4.  Load-depth curves at different loading positions

    图  5  金刚石压头作用于SiC颗粒处的压痕SEM形貌及其对应载荷−深度曲线与仿真结果

    Figure  5.  SEM morphology with its corresponding load-depth curve and simulation results of indentation on SiC particles with diamond indenter

    图  6  金刚石压头作用于两相界面处的压痕SEM形貌及其对应载-荷深度曲线与仿真结果

    Figure  6.  SEM morphology with its corresponding load-depth curve and simulation results of indentation at the interface between two phases with diamond indenter

    图  7  金刚石压头作用于基体相的压痕SEM形貌及其对应载-荷深度曲线与仿真结果

    Figure  7.  SEM morphology with its corresponding load-depth curve and simulation results of diamond indenter acting on matrix phase indentation

    图  8  划痕仿真示意图

    Figure  8.  Scratch simulation diagram

    图  9  变载荷划痕仿真云图

    Figure  9.  Variable load scratch simulation cloud map

    图  10  纳米划痕SEM形貌与局部放大图

    Figure  10.  Nano-scratch SEM morphology and local amplification

    图  11  划擦阶段的SEM形貌与仿真云图

    Figure  11.  SEM morphology and simulation nephogram during scratching stage

    图  12  耕犁阶段的SEM形貌与仿真云图

    Figure  12.  SEM morphology and simulation nephogram of ploughing stage

    图  13  切削阶段的SEM形貌与仿真云图

    Figure  13.  SEM morphology and simulation nephogram during cutting stage

    图  14  复合材料的去除形式

    Figure  14.  Removal forms of composite materials

    图  15  SiCp/Al变载荷划痕表面的形貌与划痕深度

    Figure  15.  Morphology and scratch depth of SiCp/Al scratch surface under variable load

    表  1  工件与压头材料属性

    Table  1.   Material properties of workpiece and indenter

    参数复合材料金刚石压头
    AlSiC
    密度 ρ / (t·mm−3)2.70 × 10−93.13 × 10−94.25 × 10−9
    杨氏模量 E / MPa70 000420 0001 147 000
    泊松比 ν0.300.140.07
    下载: 导出CSV

    表  2  SiCp/Al复合材料的微观力学性能参数

    Table  2.   Micromechanical properties parameters of SiCp/Al composite materials

    力学性能参数 SiC颗粒 两相界面 基体相
    硬度
    H / GPa
    范围 20.14~26.24 4.22~5.01 1.15~1.69
    平均值 22.75 4.62 1.39
    弹性模量
    E1 / GPa
    范围 150.50~224.23 76.35~88.60 60.69~77.12
    平均值 190.78 84.38 66.52
    下载: 导出CSV

    表  3  Al基体相J-C本构模型参数

    Table  3.   J-C constitutive model parameters of Al matrix phase

    参数取值
    A / MPa 270
    B / MPa 134
    C0.008 2
    m 0.703
    n 0.514
    Tmelt / ℃ 600
    Troom / ℃ 20
    ${\bar \varepsilon ^{{\mathrm{pl}}}}/ {\mathrm{S}}^{-1}$ 0.001
    下载: 导出CSV

    表  4  Al基体相的J-C损伤参数

    Table  4.   J-C damage parameters of Al matrix phase

    参数 取值
    D1 0.13
    D2 0.13
    D3 −1.551
    D4 0.011
    D5 0
    下载: 导出CSV

    表  5  SiC颗粒脆性断裂的本构模型参数

    Table  5.   Constitutive model parameters for brittle fracture of SiC particles

    参数 取值
    $ {\sigma _{\mathrm{b}}} $/ MPa 1 500
    $ G_{\mathrm{f}}^{\mathrm{I}} $/ (J·m−2) 30
    $ p $ 1
    $ {\varepsilon _{\max }^{{\mathrm{ck}}}} $ 0.001
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-08-21
  • 修回日期:  2023-12-19
  • 录用日期:  2023-12-28
  • 刊出日期:  2024-10-01

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