【摘要】：由微動(dòng)產(chǎn)生的裂紋萌生對(duì)鋼組件的疲勞強(qiáng)度具有重要影響。本文選擇GCr15軸承鋼,在20kHz超聲疲勞試驗(yàn)機(jī)提供的循環(huán)載荷作用下,測(cè)試其超長(zhǎng)壽命微動(dòng)疲勞性能。試驗(yàn)結(jié)果顯示,在109循環(huán)周次下微動(dòng)疲勞強(qiáng)度影響因子達(dá)到0.37。通過電子掃描電鏡觀察試件磨損面和微動(dòng)疲勞斷口,并分析了高頻超長(zhǎng)壽命微動(dòng)疲勞斷裂機(jī)理。高周疲勞裂紋通常會(huì)在磨損面的粘著區(qū)與滑移區(qū)交界處萌生,超高周疲勞裂紋在粘著區(qū)內(nèi)萌生。微動(dòng)磨損面的面積以及磨損面的粘著區(qū)都隨著試件疲勞壽命的增加而增加。
[Abstract]:The crack initiation caused by fretting has an important effect on the fatigue strength of steel assemblies. In this paper, GCr15 bearing steel is selected to test the fretting fatigue performance of GCr15 bearing steel under cyclic load provided by 20kHz ultrasonic fatigue tester. The results show that the fretting fatigue strength influence factor is 0.37 under 109 cycles. The wear surface and fretting fatigue fracture surface of the specimen were observed by SEM, and the fracture mechanism of fretting fatigue was analyzed. The high cycle fatigue crack usually germinates at the junction of the adhesion zone and the slip zone of the wear surface, and the ultra high cycle fatigue crack originates in the adhesion zone. The area of fretting wear surface and the adhesive zone of wear surface increase with the increase of fatigue life.
【作者單位】： 四川大學(xué)空天科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(NO.11372201)資助
【分類號(hào)】：TG142.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周仲榮;微動(dòng)圖在抗微動(dòng)失效中的應(yīng)用[J];中國(guó)表面工程;1998年01期

2 閆建中,吳蔭順,李久青,張琳;316L不銹鋼微動(dòng)磨蝕過程力學(xué)化學(xué)交互作用的遷移行為[J];中國(guó)腐蝕與防護(hù)學(xué)報(bào);2001年02期

3 任平弟,朱e，

本文編號(hào)：2393228