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2099鋁鋰合金腐蝕性能
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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃（“973”）項(xiàng)目（2012CB619563）


Corrosion Properties of 2099 Al-Li Alloy
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    摘要:

    通過(guò)光學(xué)顯微鏡觀察、透射電鏡分析和慢應(yīng)變速率拉伸試驗(yàn)，研究了2099鋁鋰合金在不同時(shí)效條件下的晶間腐蝕行為、剝落腐蝕行為、應(yīng)力腐蝕行為和微觀組織。結(jié)果表明：隨著時(shí)效時(shí)間的延長(zhǎng)，合金的耐腐蝕性能得到改善。在欠時(shí)效條件下，晶界上殘余AlCuFeMn相的存在，導(dǎo)致合金耐腐蝕性能較差；峰時(shí)效條件下，大量T1相在基體的均勻析出，改善了合金的耐腐蝕性能；在過(guò)時(shí)效條件下，大量T1相保持峰時(shí)效狀態(tài)的形貌特征，晶界析出相呈粗大不連續(xù)分布，從而使合金的耐腐蝕性能進(jìn)一步提高。

    Abstract:

    The intergranular corrosion behavior, exfoliation corrosion behavior, stress corrosion behavior and microstructures of 2099 Al-Li alloy in different aging conditions were investigated by OM, TEM and slow strain rate tensile testing. The results show that the corrosion resistance of the alloy is improved with aging time. In the under-aged condition, the remained AlCuFeMn phases at grain boundaries result in low corrosion resistance of the under-aged alloy. In the peak-aged condition, many T1 phases precipitate in the matrix, promoting the incensement of corrosion resistance of the alloy. In the over-aged condition, a great number of T1 phases still remain the morphology as that in the peak-aged alloy, and the coarse precipitates distribute along the grain boundaries with large space inducing the further growth of corrosion resistance of the alloy.

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林 毅,鄭子樵,李世晨,孔 祥,韓 燁.2099鋁鋰合金腐蝕性能[J].稀有金屬材料與工程,2014,43(6):1467~1472.[Lin Yi, Zheng Ziqiao, Li Shichen, Kong Xiang, Han Ye. Corrosion Properties of 2099 Al-Li Alloy[J]. Rare Metal Materials and Engineering,2014,43(6):1467~1472.]
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  • 收稿日期:2013-06-05
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  • 在線發(fā)布日期: 2014-11-13
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