SiC粒子強化アルミニウム合金の正弦波荷重下および繰返し衝撃荷重下における疲労特性 Fatigue Behavior of SiC Particle Reinforced A2024-T6 Aluminum Alloy under Sinusoidal and Repeated Impact Load Conditions

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Fatigue tests and fatigue crack growth tests were conducted under sinusoidal tensile load using a sintered aluminum alloy A2024-T6 reinforced with 20% SiC particles in volume. Monolithic specimens of aluminum alloy A2024-T6 were used to obtain the reference data. Fatigue tests under repeated impacts were also conducted to examine the effect of the impact load on the fatigue strengths of both materials. It was found that the particle reinforced aluminum alloy (PRM) has a higher fatigue strength and a lower resistance to the fatigue crack growth than the monolithic aluminum alloy. Re-aged monolithic aluminum alloy with higher hardness number was tested to find the effect of the hardness on the fatigue strength, but no difference of the strengths was observed between the original A2024-T6 specimens and re-aged ones. As one of the other factors, the X-ray residual stresses were measured for both materials, and considerable compressive stresses were observed in the PRM matrix. Therefore, it was concluded that the compressive stresses around SiC particles suppress the initiation of fatigue cracks and lead to the higher fatigue strength of the PRM. Additionally, it was found that the fatigue strengths of both materials under repeated impacts were lower than those under sinusoidal loads.

収録刊行物

  • 日本複合材料学会誌 = Journal of the Japan Society for Composite Materials  

    日本複合材料学会誌 = Journal of the Japan Society for Composite Materials 23(6), 211-219, 1997-11-15 

    JAPAN SOCIETY FOR COMPOSITE MATERIALS

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各種コード

  • NII論文ID(NAID)
    10002465233
  • NII書誌ID(NCID)
    AN00196748
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03852563
  • NDL 記事登録ID
    4332409
  • NDL 雑誌分類
    ZM16(科学技術--科学技術一般--工業材料・材料試験)
  • NDL 請求記号
    Z14-655
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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