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6156-T62鋁合金的高周疲勞性能研究
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國家重點基礎(chǔ)研究發(fā)展規(guī)劃 (2005CB623705)


High Cycle Fatigue Performance of 6156-T62 Aluminum Alloy
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    摘要:

    研究了不同取樣方向和應(yīng)力集中系數(shù)（Kt）條件下6156鋁合金的高周疲勞性能，并利用金相、透射和掃描電鏡對合金的顯微組織及斷口進(jìn)行了觀察。結(jié)果表明，在同一應(yīng)力水平條件下，取樣方向?qū)饣嚇雍腿笨谠嚇拥钠趬勖绊懮跷?。光滑試樣（Kt=1）的疲勞壽命大于缺口試樣（Kt=3）的疲勞壽命，表明此合金有明顯的缺口效應(yīng)。第二相粒子在疲勞裂紋萌生過程中起關(guān)鍵作用，絕大部分裂紋都是在表面粗大粒子上或粒子/基體界面上萌生。

    Abstract:

    The high cycle fatigue of 6156 aluminum alloy was investigated under the conditions of different orientations and stress concentration factor. In addition, the microstructures and the fatigue fracture surfaces of the alloy were examined by optical, transmission and scanning electron microscopy. The results show that the effect of different orientations on the fatigue life of 6156 aluminum alloy is rather little and the fatigue life of Kt=1 is longer than that of Kt = 3, exhibiting notch sensitivity. The second phase particles play a key role during fatigue crack initiation, and most part of the cracks originate from the coarse particles on the surface or from the interface between the second phase particles and matrix.

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佘玲娟,鄭子樵,鐘 申,吳秋萍,李紅萍.6156-T62鋁合金的高周疲勞性能研究[J].稀有金屬材料與工程,2012,41(7):1201~1205.[She Lingjuan, Zheng Ziqiao, Zhong Shen, Wu Qiuping, Li Hongping. High Cycle Fatigue Performance of 6156-T62 Aluminum Alloy[J]. Rare Metal Materials and Engineering,2012,41(7):1201~1205.]
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  • 收稿日期:2011-07-28
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