近年，省資源や地球環境の観点から機器・構造物のrn軽量化，リサイクル化などが強く要求され，アルミニrnウム合金の使用が拡大している．具体的な用途としてrnは自動車・オートバイの部品から航空・宇宙関連に至rnるまで広い範囲にわたっており，エンジンなどにも用rnいられるようになってきた．そのような用途におけるrn締結部などの部材組合わせ部には微小な相対すべりをrn生じる場合があり，疲労信頼性確保のためには，フレrnツティング疲労強度特性について十分検討しておく必rn要がある．%Fretting fatigue tests were carried out in order to investigate the effect of solid lubricant film on fretting fatigue strength of aluminum alloy (JIS A7N01). The ratio of fretting fatigue limit and plain fatigue limit (σ_(wf)/σ_(w)) for the present material without surface film was about 0.25, which was much lower than other aluminum alloys reported. Fretting fatigue strength was remarkably improved by using the solid lubricant film. The tangential force coefficient for the contact pad with solid lubricant film was significantly low compared to that for the contact pad without film. Heavy damage induced by the fretting on the specimen surface was observed for the case without solid lubricant film. On the other hand, only light damage can be found on the fretting surface for the case of the contact pad with solid lubricant film. Prevention of metal-to metal contact and low tangential force coefficient due to solid lubricant film may be the main reasons for improved high fretting fatigue strength.
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