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高速微粒轟擊對微弧氧化鋁合金疲勞性能的影響
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裝甲兵工程學(xué)院裝備維修與再制造工程系,裝甲兵工程學(xué)院裝備維修與再制造工程系,裝甲兵工程學(xué)院裝備維修與再制造工程系,裝甲兵工程學(xué)院裝備維修與再制造工程系

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Effect of High-speed Particles Bombarding Pre-treatment on the Fatigue Properties of Micro-arc Oxidation Aluminum Alloy
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Faculty of Remanufacturing Engineering,Academy of Armored Force Engineering,Faculty of Remanufacturing Engineering,Academy of Armored Force Engineering,Faculty of Remanufacturing Engineering,Academy of Armored Force Engineering,Faculty of Remanufacturing Engineering,Academy of Armored Force Engineering

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    摘要:

    以獲取高性能微弧氧化陶瓷膜,且不降低基體鋁合金的抗疲勞性能為目標(biāo),采用高速微粒轟擊處理工藝和微弧氧化處理工藝制備了未處理、高速微粒轟擊處理、微弧氧化處理、高速微粒轟擊+微弧氧化處理復(fù)合處理4種狀態(tài)的試樣,通過萬能疲勞試驗機對其疲勞壽命進(jìn)行了測試；同時,應(yīng)用透射電鏡和XRD殘余應(yīng)力測試儀等分析方法對試樣的表層微觀組織結(jié)構(gòu)和殘余應(yīng)力進(jìn)行了觀察與測試。結(jié)果表明：加載載荷較高時,4種試樣疲勞壽命基本相同,壽命較短；加載載荷較低時,微弧氧化處理鋁合金的疲勞壽命明顯低于未處理試樣,高速微粒轟擊處理導(dǎo)致的微觀組織結(jié)構(gòu)細(xì)化和形成的殘余壓應(yīng)力可以有效抑制疲勞裂紋的萌生和擴展,使未處理和微弧氧化鋁合金的疲勞壽命均得到有效提高,這2種高速顆粒轟擊處理過的試樣的疲勞壽命均高于未處理試樣,這表明高速顆粒轟擊強化處理可有效提高低應(yīng)力水平時微弧氧化鋁合金的疲勞壽命。

    Abstract:

    In order to obtain the micro arc oxidation ceramic coatings of high performance and not to reduce the fatigue properties of aluminum alloy, 4 kinds surface conditions of aluminum alloy samples with untreated, high-speed fine particles bombarding treated, micro-arc oxidation treated, high-speed fine particles bombarding + micro-arc oxidation combining treated were prepared by high-speed fine particles bombarding technology and micro-arc oxidation (MAO) technique, and the fatigue lives of these samples were tested by universal fatigue test machine. At the same time, the surface layer microstructure and surface residual stress of these samples were observed and tested by TEM and XRD residual stress tester. Results show that all the surface conditions of the 4 kinds of samples had almost the same shorter fatigue life at high loads, but the fatigue life of these samples with micro-arc oxidation treatment was the shortest among all the samples at low loads, and it was significantly shorter than the untreated samples. The microstructure refinement and residual compressive stress resulted by high-speed fine particles bombarding treatment could effectively suppress the initiation and propagation of fatigue crack, so the fatigue life of the samples of high-speed fine particles bombarding treatment before and after micro-arc oxidation treatment were all improved, and the fatigue life of the two kinds of samples were both longer than the untreated samples, which shows that high-speed fine particles bombardment strengthening treatment could effectively improve the fatigue life of micro-arc oxidation aluminum alloy at lower stress level.

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李占明,王紅美,孫曉峰,邱 驥.高速微粒轟擊對微弧氧化鋁合金疲勞性能的影響[J].稀有金屬材料與工程,2018,47(7):2179~2184.[LI Zhanming, WANG Hongmei, SUN Xiaofeng, QIU Ji. Effect of High-speed Particles Bombarding Pre-treatment on the Fatigue Properties of Micro-arc Oxidation Aluminum Alloy[J]. Rare Metal Materials and Engineering,2018,47(7):2179~2184.]
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  • 收稿日期:2016-07-22
  • 最后修改日期:2016-09-03
  • 錄用日期:2016-10-18
  • 在線發(fā)布日期: 2018-10-10
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