| 碱热处理对搅拌摩擦加工AZ31镁合金耐腐蚀性能的影响 |
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| 引用本文： | 陈善勇,王快社,乔柯,王文.碱热处理对搅拌摩擦加工AZ31镁合金耐腐蚀性能的影响[J].金属热处理,2022,47(3):61-66. |
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| 作者姓名： | 陈善勇 王快社 乔柯 王文 |
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| 作者单位： | 1.西安建筑科技大学 冶金工程学院, 陕西 西安 710055;2.西安建筑科技大学 功能材料加工国家地方联合工程研究中心, 陕西 西安 710055 |
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| 基金项目： | 国家自然科学基金(U1760201,52034005,51974220)；;陕西省自然科学基金(2019JQ-769)；;陕西省工业重点攻关项目(2020ZDLGY13-06)； |
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| 摘 要： | 对AZ31镁合金进行搅拌摩擦加工(Friction stir processing,FSP),并对母材(Basal material, BM)和FSP试样进行碱热处理(Alkali heat treatment,AHT),研究了AHT对搅拌摩擦加工后AZ31镁合金微观组织和耐腐蚀性能的影响。结果表明,FSP可以显著细化晶粒,平均晶粒尺寸由BM的12.8 μm细化至FSP后的3.1 μm,高角度晶界比例从BM的75.9%降低至FSP后的45.3%,晶界亚结构增多。AHT使材料表面形成致密的MgO和Al2O3混合涂层,有效地提高了AZ31镁合金的耐浸泡腐蚀性能。
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| 关 键 词： | AZ31镁合金 搅拌摩擦加工 微观组织 碱热处理 腐蚀 |
| 收稿时间： | 2021-11-08 |
Effect of alkali heat treatment on corrosion resistance of friction stir processed AZ31 magnesium alloy |
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| Chen Shanyong,Wang Kuaishe,Qiao Ke,Wang Wen.Effect of alkali heat treatment on corrosion resistance of friction stir processed AZ31 magnesium alloy[J].Heat Treatment of Metals,2022,47(3):61-66. |
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| Authors: | Chen Shanyong Wang Kuaishe Qiao Ke Wang Wen |
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| Affiliation: | 1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China; 2. National and Local Joint Engineering Research Center for Functional Materials Processing, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China |
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| Abstract: | Friction stir processing (FSP) was performed on AZ31 magnesium alloy, and alkali heat treatment (AHT) was performed on the basal material (BM) and FSPed specimens. The effect of AHT on microstructure and corrosion resistance of the friction stir processed AZ31 magnesium alloy was studied. The results show that the FSP can significantly refine the grains, the average grain size is decreased from 12.8 μm of BM to 3.1 μm after FSP, the proportion of high angle grain boundaries decreased from 75.9% of BM to 45.3% after FSP, and the grain boundary substructure is increased. The AHT induces the material to form a dense MgO and Al2O3 mixed coating on the surface, which effectively improves the immersion corrosion resistance of the AZ31 magnesium alloy. |
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| Keywords: | AZ31 magnesium alloy friction stir processing microstructure alkali heat treatment corrosion |
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