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超聲波與電火花表面復(fù)合強(qiáng)化Ti17合金的疲勞性能
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Fatigue Properties of Ti17 Alloy Strengthened by Combination of Electric Spark Treatment with Ultrasonic Surface Treatment
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National Natural Science Funds (50702045); The Research Fund for the Doctoral Program of Higher Education (20070699007); Program for New Century Excellent Talents in University

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    摘要:

    將Ti17合金經(jīng)過電火花處理(EST)后再進(jìn)行超聲波表面處理以期提高疲勞壽命。通過掃描電子顯微鏡觀察表面形貌及強(qiáng)化層結(jié)構(gòu)，經(jīng)X射線衍射分析表面殘余應(yīng)力，采用HT-100高溫疲勞試驗(yàn)機(jī)測試350 ℃拉-拉疲勞壽命。結(jié)果表明，經(jīng)過超聲波表面處理后，試樣表面粗糙度及表面殘余應(yīng)力降低，復(fù)合強(qiáng)化后試樣的疲勞壽命是僅經(jīng)過EST處理的兩倍。經(jīng)過硬質(zhì)合金YG8電極EST以及超聲波復(fù)合處理的試樣疲勞壽命最長

    Abstract:

    The surfaces of Ti17 alloy were strengthened by an electric spark treatment (EST), then an ultrasonic surface treatment was used in order to improve the fatigue life. The surface morphology was observed by SEM. The surface residual stress was analyzed by a X-ray diffractometer. Tension-tension fatigue tests were carried out in a HT-100 fatigue testing machine at 350 oC. The results show that the surface roughness and the residual stress are reduced for the specimens after the ultrasonic treatment. The fatigue life of the specimens strengthened by ultrasonic treatments is about twice that of the specimens treated by EST only. The fatigue life of the specimen strengthened by YG8 electrode EST combination with ultrasonic treatment is the longest

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焦 磊,喬生儒,張程煜,馬 侃,韓 棟,Dina Gertsriken, Vladimir Mazanko.超聲波與電火花表面復(fù)合強(qiáng)化Ti17合金的疲勞性能[J].稀有金屬材料與工程,2010,39(12):2091~2094.[Jiao Lei, Qiao Shengru, Zhang Chengyu, Ma Kan, Han Dong, Dina Gertsriken, Vladimir Mazanko. Fatigue Properties of Ti17 Alloy Strengthened by Combination of Electric Spark Treatment with Ultrasonic Surface Treatment[J]. Rare Metal Materials and Engineering,2010,39(12):2091~2094.]
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  • 收稿日期:2009-12-28
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