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攪拌摩擦焊接Al-Mg-(Zn) 合金的腐蝕行為
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北京科技大學(xué)新金屬材料國家重點實驗室,北京科技大學(xué)新金屬材料國家重點實驗室,北京科技大學(xué)新金屬材料國家重點實驗室,北京科技大學(xué)新金屬材料國家重點實驗室,哈爾濱工業(yè)大學(xué)(威海)山東省特種焊接技術(shù)重點實驗室,北京科技大學(xué)新金屬材料國家重點實驗室

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國家自然科學(xué)基金項目（面上項目，重點項目，重大項目）;國家杰出青年科學(xué)基金;交通用金屬材料與加工北京實驗室項目;新金屬材料國家重點實驗室項目


Corrosion Behavior of Friction Stir Welded Al-Mg-(Zn) Alloys
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State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Shandong Provincial Key Laboratory of Special Welding,Harbin Institute of Technology at Weihai,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan);The National Science Fund for Distinguished Young Scholars;Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, China; State Key Lab of Advanced Metals and Materials, China

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    摘要:

    本文研究了攪拌摩擦焊接含Zn Al-Mg合金的腐蝕行為及焊后熱處理對攪拌摩擦焊接合金腐蝕行為的影響。結(jié)果表明,經(jīng)焊后熱處理后不同焊接區(qū)的最大腐蝕深度和主導(dǎo)腐蝕模式隨Zn含量增加而發(fā)生明顯變化。Zn的加入使主導(dǎo)腐蝕模式由晶間腐蝕變?yōu)辄c蝕。與加工硬化態(tài)合金相比,時效硬化態(tài)合金具有嚴(yán)重的電偶腐蝕傾向。對于析出強化Al-Mg-Zn合金而言,這在很大程度上與不連續(xù)分布的晶界析出相及豐富的晶內(nèi)析出相的形成密切相關(guān),而對無Zn的Al-Mg合金,其則與連續(xù)分布的晶界β-AlMg相相關(guān)。

    Abstract:

    The corrosion behavior of friction stir welded Zn-modified Al-Mg alloys are systematically investigated as well as the effects of pre-weld temper conditions on the corrosion behavior of the friction stir welded alloys. Both maximum corrosion depth and dominating corrosion mode in different weld regions after post welding heat treatment show obvious variations with an increase in the Zn content. With Zn additions the dominating corrosion mode changes from intergranular corrosion to pitting corrosion, and the severe galvanic corrosion tendency obviously occurs in the precipitation hardened alloys compared to that of the strain hardened alloy. This would be greatly related with the formation of discontinuously distributed grain boundary precipitates as well as abundant intragranular precipitates (mainly T-AlZnMgCu phase) in the precipitation hardened Al-Mg-Zn alloys while it is in line with the continuously distributed β-AlMg phase along grain boundary in the Zn-free Al-Mg alloys.

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侯隴剛,于佳佳,張迪,莊林忠,周利,張濟山.攪拌摩擦焊接Al-Mg-(Zn) 合金的腐蝕行為[J].稀有金屬材料與工程,2017,46(9):2437~2444.[Longgang Hou, Jiajia Yu, Di Zhang, Linzhong Zhuang, Li Zhou, Jishan Zhang. Corrosion Behavior of Friction Stir Welded Al-Mg-(Zn) Alloys[J]. Rare Metal Materials and Engineering,2017,46(9):2437~2444.]
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  • 收稿日期:2016-06-20
  • 最后修改日期:2017-09-11
  • 錄用日期:2017-02-23
  • 在線發(fā)布日期: 2017-11-29
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