Ductility Improvement of an AZ61 Magnesium Alloy through Two-Pass Submerged Friction Stir Processing.
Ductility Improvement of an AZ61 Magnesium Alloy through Two-Pass Submerged Friction Stir Processing.
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DOI：
10.3390/ma10030253
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发表时间：
2017-03-02
期刊：
影响因子：
--
通讯作者：
Zhang D
中科院分区：
文献类型：
--
作者：
Luo X;Cao G;Zhang W;Qiu C;Zhang D
搅拌摩擦加工（FSP）被认为是一种细化晶粒尺寸和均匀化金属材料微观结构的新技术。本研究在水下进行两道次FSP以提高加工过程中的冷却速率，并通过该方法制备了具有细晶且均匀组织的AZ61镁合金。与铸态材料相比，一次FSP导致晶粒细化，β-Mg17Al12相破碎成小颗粒。使用较小的搅拌工具和100%的重叠率，通过两道次FSP获得了更细小、更均匀的显微组织，平均晶粒尺寸为4.6μm。与单道次FSP合金相比，两道次FSP合金的延伸率显着提高了37.2%±4.3%，但强度略有下降。除了微观结构细化外，搅拌区的织构演变也被认为是延展性提高的原因。
Friction stir processing (FSP) has been considered as a novel technique to refine the grain size and homogenize the microstructure of metallic materials. In this study, two-pass FSP was conducted under water to enhance the cooling rate during processing, and an AZ61 magnesium alloy with fine-grained and homogeneous microstructure was prepared through this method. Compared to the as-cast material, one-pass FSP resulted in grain refinement and the β-Mg17Al12 phase was broken into small particles. Using a smaller stirring tool and an overlapping ratio of 100%, a finer and more uniform microstructure with an average grain size of 4.6 μm was obtained through two-pass FSP. The two-pass FSP resulted in a significant improvement in elongation of 37.2% ± 4.3%, but a slight decrease in strength compared with one-pass FSP alloy. Besides the microstructure refinement, the texture evolution in the stir zone is also considered responsible for the ductility improvement.
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影响因子：
6
作者：
Wang, Y. N.;Chang, C. I.;Huang, J. C.
通讯作者：
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影响因子：
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作者：
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DOI：
10.1016/j.msea.2015.01.030
发表时间：
2015-03-25
影响因子：
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DOI：
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发表时间：
2010-01-01
影响因子：
2.8
作者：
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通讯作者：
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