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航空铝合金材料腐蚀裂纹扩展性能试验

王池权 熊峻江 马少俊 陈勃

王池权, 熊峻江, 马少俊, 等 . 航空铝合金材料腐蚀裂纹扩展性能试验[J]. 北京航空航天大学学报, 2017, 43(5): 935-941. doi: 10.13700/j.bh.1001-5965.2016.0360
引用本文: 王池权, 熊峻江, 马少俊, 等 . 航空铝合金材料腐蚀裂纹扩展性能试验[J]. 北京航空航天大学学报, 2017, 43(5): 935-941. doi: 10.13700/j.bh.1001-5965.2016.0360
WANG Chiquan, XIONG Junjiang, MA Shaojun, et al. Tests for corrosion crack propagation behavior of aeronautical aluminum alloys[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(5): 935-941. doi: 10.13700/j.bh.1001-5965.2016.0360(in Chinese)
Citation: WANG Chiquan, XIONG Junjiang, MA Shaojun, et al. Tests for corrosion crack propagation behavior of aeronautical aluminum alloys[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(5): 935-941. doi: 10.13700/j.bh.1001-5965.2016.0360(in Chinese)

航空铝合金材料腐蚀裂纹扩展性能试验

doi: 10.13700/j.bh.1001-5965.2016.0360
基金项目: 

国家自然科学基金 51375033

详细信息
    作者简介:

    王池权, 男, 博士研究生。主要研究方向:航空金属结构材料腐蚀疲劳及裂纹扩展性能

    熊峻江, 男, 博士, 教授, 博士生导师。主要研究方向:飞机结构适航性、飞行器系统与结构效能评估

    通讯作者:

    熊峻江,E-mail:jjxiong@buaa.edu.cn

  • 中图分类号: V252.2;TG113.1;TG115.5

Tests for corrosion crack propagation behavior of aeronautical aluminum alloys

Funds: 

National Natural Science Foundation of China 51375033

More Information
  • 摘要:

    腐蚀环境下的裂纹扩展性能是航空金属结构损伤容限设计的重要前提,为此,试验测定了3种航空铝合金材料(即2E12-T3、2E12-T42和7050-T7451) 在2种腐蚀环境(3.5wt% NaCl溶液和油箱积水)下的裂纹扩展性能,在试验数据的基础上进行性能对比,并对试样断口进行SEM分析,研究了腐蚀和载荷联合作用对裂纹扩展的影响机理,研究结果表明:油箱积水环境对航空铝合金材料裂纹扩展的影响比3.5wt% NaCl溶液严重,铝合金2E12-T3和2E12-T42的腐蚀裂纹扩展性能优于铝合金7050-T7451,腐蚀环境下的氢脆效应和阳极溶解机制是造成腐蚀裂纹扩展加速的主要原因。

     

  • 图 1  标准M(T)试样

    Figure 1.  Standard M(T) specimen

    图 2  裂纹扩展测试

    Figure 2.  Crack propagation test

    图 3  2E12-T3铝合金断口分析

    Figure 3.  Fractographic analysis of 2E12-T3 aluminum alloy

    图 4  7050-T7451铝合金断口分析

    Figure 4.  Fractographic analysis of 7050-T7451 aluminum alloy

    图 5  裂纹扩展da/dNK

    Figure 5.  Crack propagation da/dNK curves

    图 6  不同航空铝合金扩展速率对比

    Figure 6.  Comparison of propagation rates among different aeronautical aluminum alloys

    表  1  铝合金的力学性能

    Table  1.   Mechanical properties of aluminum alloys

    材料 E/GPa σb/MPa σs/MPa δ/%
    2E12-T3 72.4 473 364 18.0
    2E12-T42 70.0 472 421 9.5
    7050-T7451 70.3 510 455 9.0
    下载: 导出CSV

    表  2  裂纹扩展da/dNK参数值

    Table  2.   Parameter values of crack propagation da/dNK

    材料 环境 C/(mm·次-1) m
    2E12-T3 3.5wt%NaCl溶液 5.53×10-10 4.62
    油箱积水 4.43×10-9 3.95
    2E12-T42 3.5wt%NaCl溶液 9.04×10-12 5.87
    油箱积水 5.02×10-9 3.95
    7050-T7451 3.5wt%NaCl溶液 2.19×10-8 4.41
    油箱积水 4.71×10-8 4.09
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-05-03
  • 录用日期:  2016-07-22
  • 网络出版日期:  2017-05-20

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