热处理对<strong>Al-Mg-Ga-In-Sn</strong>合金微观结构和铝水反应的影响

doi:10.11901/1005.3093.2020.080

材料研究学报

2021, Vol. 35

Issue (1): 25-35 DOI: 10.11901/1005.3093.2020.080

研究论文

本期目录 | 过刊浏览

热处理对Al-Mg-Ga-In-Sn合金微观结构和铝水反应的影响

杜邦登¹, 刘军², 王晓婉¹, 汪伟¹(

), 陈德敏¹(

)

^1.中国科学院金属研究所沈阳 110016
^2.中石化江汉油田石油工程技术研究院武汉 430035

Effect of Heat Treatment on Microstructure and Al-water Reactivity of Al-Mg-Ga-In-Sn Alloys

DU Bangdeng¹, LIU Jun², WANG Xiaowan¹, WANG Wei¹(

), CHEN Demin¹(

)

^1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.Institute of Petroleum Engineering Research, Sinopec Jianghan Oilfield, Wuhan 430035, China

引用本文:

杜邦登, 刘军, 王晓婉, 汪伟, 陈德敏. 热处理对Al-Mg-Ga-In-Sn合金微观结构和铝水反应的影响[J]. 材料研究学报, 2021, 35(1): 25-35.
Bangdeng DU, Jun LIU, Xiaowan WANG, Wei WANG, Demin CHEN. Effect of Heat Treatment on Microstructure and Al-water Reactivity of Al-Mg-Ga-In-Sn Alloys[J]. Chinese Journal of Materials Research, 2021, 35(1): 25-35.

全文: PDF(19993 KB) HTML

摘要:

制备不同镁含量的Al-Mg-Ga-In-Sn合金并对其进行固溶和时效热处理，用XRD和SEM分析和观察了显微结构和腐蚀表面，用AFM/SKPFM测量了合金不同晶界相与铝晶粒间的电势差，用排水法测量了在不同水温下合金的铝水反应。结果表明，热处理改变了合金低熔点界面相的种类、形态以及合金晶粒内Mg和Ga含量。热处理态Mg含量低于4%的合金，其中有Mg₂Sn、MgGa、MgGa₂、MgIn界面相；在Mg含量为5%的热处理态合金中出现了Mg₅Ga₂、Mg₂Ga相。在时效态合金晶粒内有MgGa相析出。与相同成分的铸态合金相比，时效态合金中各晶界相与铝基体间的电位差较大。热处理态合金的产氢速率和产氢率，与合金的Mg含量有关。分析了热处理使合金显微结构和晶界相与铝基体间电位差变化的原因，并讨论了热处理对合金铝水反应的影响。

关键词 ：金属材料, 铝合金, 镁, 热处理, 微观结构, 铝水反应, 电位差

Abstract：

Al-Mg-Ga-In-Sn alloys with different Mg-contents were prepared and then subjected to solution and aging treatment. The microstructure and corrosion morphology after immersion in water of alloys was characterized by means of XRD and SEM with EDX. The Volta potential differences (ΔVPD) of interfacial phases with respect to Al matrix were measured using AFM/SKPFM. The Al-water reactivity of alloys in waters at different temperature were measured by using drainage method. The heat treatment influences the phase type, morphology of interfacial phases, and the content of Mg and Ga inside Al grains. As the Mg content is below 4% the heat-treated alloys contain interfacial phases of Mg₂Sn, MgGa, MgGa₂ and_{MgIn. Mg₅Ga₂ and Mg₂Ga phases occurs as the Mg content of alloy is c.a. 5%. MgGa phase precipitates within Al grains of the aged alloys. The heat-treated alloys exhibit higher the Volta potential differences (ΔVPD) of interfacial phases with respect to Al in comparison with the cast ones. The generation rate and yield amount of hydrogen correlate with Mg contents of the heat-treated alloys. The reasons that the heat treatment affects the microstructures of alloys and the Volta potential differences (ΔVPD) of interfacial phases with respect to Al were analyzed, and the effect of heat treatment on the Al-water reactivity of alloys was also discussed.}

Key words： metallic materials aluminum alloy magnesium heat treatment microstructures Al-water reactivity Volta potential differences

收稿日期: 2020-03-16

ZTFLH:

TG14

基金资助:国家科技重大专项(2016ZX05060004);中国科学院创新基金(CXJJ-17-M158)

作者简介: 杜邦登，男，1989年生，博士

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图1 不同Mg含量Al-Mg-Ga-In-Sn固溶态和时效态合金的XRD谱

图2 不同Mg含量固溶态和时效态Al-Mg-Ga-In-Sn合金的断口形貌

表1 热处理态Al?Mg?Ga?In?Sn合金铝晶粒和晶界相的成分

图3 不同Mg含量时效态Al-Mg-Ga-In-Sn合金中铝晶粒断口形貌和铝晶粒析出相能谱

图4 Al-Mg-Ga-In-Sn合金中铝晶粒的成分与Mg含量的关系

图5 不同Mg含量Al-Mg-Ga-In-Sn合金的产氢曲线

图6 产氢速率和产氢率与Mg含量的关系

图7 Mg含量为3%的时效合金中Mg2Sn相以及MgGa和MgGa+MgIn相的表面形貌、表面电势和电势分布

图8 Mg含量为5%的时效态合金中Mg2Sn和MgIn相以及MgGa和Mg5Ga2相的表面形貌、表面电势和电势分布

表2 Mg含量3%和5%的铸态[14]和时效态合金中晶界相与铝基体间的ΔVPD

图9 Al-Mg-Ga-In-Sn合金与70℃水接触不同时间后的腐蚀形貌

表3 时效态Al-Mg-Ga-In-Sn合金在70℃水中浸泡不同时间后各相的成分

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