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Corrosion behavior of friction stir-welded AZ31 Mg alloy after plastic deformation
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-03-16 , DOI: 10.1002/maco.202112311 Dejia Liu 1, 2 , Jiaxin Yu 1 , Yafeng Zhang 1 , Yonggan Zhang 2 , Mingxue Shen 1, 2
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-03-16 , DOI: 10.1002/maco.202112311 Dejia Liu 1, 2 , Jiaxin Yu 1 , Yafeng Zhang 1 , Yonggan Zhang 2 , Mingxue Shen 1, 2
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Postweld plastic deformation was reported to be able to largely enhance the mechanical properties of friction stir-welded (FSW) Mg alloys by changing microstructures in the regions with a soft-oriented texture. However, few studies have concentrated on the effects of postweld plastic deformations on the corrosion behavior of FSW Mg alloys, which has an impact on their application. In the present study, electrochemical measurements, hydrogen evolution, and mass loss tests were used to study the influences of postweld compression along the transverse direction and subsequent annealing on the corrosion rate of FSW AZ31 Mg alloys. It was found that owing to the grain refinement in the weld zones, an improvement in the corrosion resistance and hardness was observed in the FSW AZ31 sample compared to the base metal (BM) sample. Postweld compression was very harmful to the corrosion resistance of the FSW AZ31 alloys. On the basis of the mass loss results, the corrosion rate of the compressed FSW sample was ~17.62 mm/year, which was ~8.99 times that of the FSW sample (~1.96 mm/year). Subsequent annealing could slightly reduce the corrosion rate of the compressed FSW AZ31 plates, whereas the corrosion rate of the FSW-C-T sample (~13.63 mm/year) was much worse than that of the BM sample (~4.73 mm/year).
中文翻译：
搅拌摩擦焊AZ31镁合金塑性变形后的腐蚀行为
据报道，焊后塑性变形能够通过改变具有软取向纹理区域的微观结构，在很大程度上提高搅拌摩擦焊 (FSW) 镁合金的机械性能。然而，很少有研究关注焊后塑性变形对 FSW 镁合金腐蚀行为的影响，这对其应用有影响。在本研究中，电化学测量、析氢和质量损失测试用于研究焊后横向压缩和后续退火对 FSW AZ31 镁合金腐蚀速率的影响。结果表明，由于焊接区的晶粒细化，与母材 (BM) 样品相比，FSW AZ31 样品的耐腐蚀性和硬度有所提高。焊后压缩对 FSW AZ31 合金的耐腐蚀性非常有害。根据质量损失结果，压缩 FSW 样品的腐蚀速率为 ~17.62 毫米/年，是 FSW 样品（~1.96 毫米/年）的 ~8.99 倍。随后的退火可以稍微降低压缩 FSW AZ31 板的腐蚀速率，而 FSW-CT 样品的腐蚀速率（~13.63 毫米/年）比 BM 样品的腐蚀速率（~4.73 毫米/年）差得多。
更新日期：2021-03-16
中文翻译：
搅拌摩擦焊AZ31镁合金塑性变形后的腐蚀行为
据报道，焊后塑性变形能够通过改变具有软取向纹理区域的微观结构，在很大程度上提高搅拌摩擦焊 (FSW) 镁合金的机械性能。然而，很少有研究关注焊后塑性变形对 FSW 镁合金腐蚀行为的影响，这对其应用有影响。在本研究中，电化学测量、析氢和质量损失测试用于研究焊后横向压缩和后续退火对 FSW AZ31 镁合金腐蚀速率的影响。结果表明，由于焊接区的晶粒细化，与母材 (BM) 样品相比，FSW AZ31 样品的耐腐蚀性和硬度有所提高。焊后压缩对 FSW AZ31 合金的耐腐蚀性非常有害。根据质量损失结果，压缩 FSW 样品的腐蚀速率为 ~17.62 毫米/年，是 FSW 样品（~1.96 毫米/年）的 ~8.99 倍。随后的退火可以稍微降低压缩 FSW AZ31 板的腐蚀速率，而 FSW-CT 样品的腐蚀速率（~13.63 毫米/年）比 BM 样品的腐蚀速率（~4.73 毫米/年）差得多。
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