通过扭转和反扭转加工改善镁合金管材塑性加工性的因素

Hayata Okazaki, T. Kato, M. Furui
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引用次数: 0

摘要

镁合金具有重量轻、可回收性高等优点。另一方面,人们认为镁由于其晶体结构,在室温下具有塑性加工性差的缺点。特别是在管道材料中,弯曲时压缩侧会产生褶皱。通过扭转和反扭转,提高镁合金管材的弯曲加工性。在本研究中,使用经过扭转和反扭转处理的管道试件进行拉伸和压缩试验,表明屈服应力差异减小。加工后的管材组织观察显示,晶粒尺寸减小,形成变形孪晶。维氏硬度试验表明,通过扭转和反扭转,硬度增加。弯曲试验表明,经扭转和反扭转后,压扁率降低。结果表明,扭转和反扭转对镁合金管材的弯曲加工性有改善作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Factor for Improvement of Plastic Workability in Magnesium Alloy Pipes through Processing by Torsion and Back-Torsion
Magnesium alloys have the advantages being lightweight and high recyclability. On the other hands, it is thought that magnesium has the disadvantage of poor plastic workability at room temperature due to its crystal structure. Especially, in pipe materials, winkles occur on the compressed side during bending. We aim to improve the bending workability in magnesium alloy pipe by torsion and back-torsion. In this study, tensile and compressive tests using specimens of pipes processed by torsion and back-torsion showed reduction the difference of yield stress. Microstructural observation of processed pipes revealed reducing crystal grain size and forming deformation twinning. Vickers hardness tests shows increasing hardness by torsion and back-torsion. Moreover, bending tests showed decreasing flatting ratio by torsion and back-torsion. These results demonstrated that torsion and back-torsion have effect of improvement in bending workability for magnesium alloy pipes.
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