最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
時效析出相微結構改變對AA2024鋁合金應力腐蝕行為的影響
作者:
作者單位:

湖南大學材料科學與工程學院

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家自然科學基金資助(No. 51471067, No. 51671082, No. 11427806)；國家重點研發(fā)計劃資助(No. 2016YFB0300801)


The influence of precipitation microstructure change on the stress corrosion behavior of AA2024 aluminum alloy
Author:
Affiliation:

College of Materials Science and Engineering, Hunan University

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻
    • |
  • 相似文獻
    • |
  • 引證文獻
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    通過恒載荷應力腐蝕實驗、掃描電鏡（SEM）和透射電鏡（TEM）等測試方法，研究了時效處理中析出行為的變化對AA2024鋁合金應力腐蝕行為的影響。結果表明，合金在T3態(tài)時對應力腐蝕較為敏感，進行T8時效處理后，合金的應力腐蝕敏感性顯著降低。利用高角環(huán)形暗場成像掃描透射電鏡技術（HAADF-STEM）對合金進行準原位腐蝕實驗觀察，研究了合金T3和T8時效狀態(tài)下的腐蝕過程和析出行為的變化情況，直觀地展示了不同時效狀態(tài)合金的腐蝕形態(tài)：T3態(tài)的合金為晶間腐蝕形貌，T8態(tài)的合金為晶間腐蝕和晶粒腐蝕相結合。由于析出行為和腐蝕機制的改變，不同時效狀態(tài)的AA2024鋁合金的應力腐蝕敏感性不同。

    Abstract:

    The effect of precipitation microstructure change on the stress corrosion behavior of AA2024 aluminum alloy was investigated by constant load stress corrosion tests, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results show that the T3 alloy is much more sensitive to stress corrosion than the T8 alloy. The corrosion process and precipitation microstructure change of T3 and T8 alloys were investigated by in-situ corrosion observations operated by high-angle annular dark-field scanning TEM (HAADF-STEM), which intuitively demonstrate the different corrosion morphologies: the corrosion morphology of T3 alloy is intergranular corrosion and that of T8 alloy is a combination of intergranular corrosion and grain attack. Because of the change in precipitation microstructure and corrosion mechanism, the alloys with different ageing conditions possess different stress corrosion susceptibility.

    參考文獻
    相似文獻
    引證文獻
引用本文

孫麗,牛鳳姣,伍翠蘭,賴玉香,陳江華.時效析出相微結構改變對AA2024鋁合金應力腐蝕行為的影響[J].稀有金屬材料與工程,2019,48(9):2944~2950.[Sun Li, Niu Fengjiao, Wu Cuilan, Lai Yuxiang, Chen Jianghua. The influence of precipitation microstructure change on the stress corrosion behavior of AA2024 aluminum alloy[J]. Rare Metal Materials and Engineering,2019,48(9):2944~2950.]
DOI：10.12442/j. issn.1002-185X.20180286

復制
文章指標
  • 點擊次數:
  • 下載次數:
  • HTML閱讀次數:
  • 引用次數:
歷史
  • 收稿日期:2018-03-26
  • 最后修改日期:2018-04-26
  • 錄用日期:2018-05-18
  • 在線發(fā)布日期: 2019-10-09
  • 出版日期: