A novel severe plastic deformation method for manufacturing AZ31 magnesium alloy tube

A novel severe plastic deformation method for manufacturing AZ31 magnesium alloy tube
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一种新型剧烈塑性变形制造AZ31镁合金管材的方法

DOI:
10.1007/s00170-018-2179-3
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发表时间:
2018-06
期刊:
The International Journal of Advanced Manufacturing Technology
影响因子:
--
通讯作者:
Xiang Ma
Xiang Ma
中科院分区:
其他
文献类型:
--
作者:
Hong Jun Hu;Xi Qin;Dingfei Zhang;Xiang Ma

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提出了一种将直接挤压与两步剪切相结合的管材挤压剪切新工艺。为了探索TES工艺的变形机理,本文采用了实验和数值模拟相结合的方法。采用三维有限元模拟方法研究变形镁合金在TES过程中的塑性变形行为。实验表明,采用TES工艺可使组织细化到原始晶粒尺寸的50%,且晶粒分布更加均匀。与直接挤压法相比,TES工艺可明显提高材料的硬度。数值结果表明,TES通过直接挤压和附加剪切有效地增加了累积应变。
A new severe plastic deformation called TES (tube extrusion shearing) process, which combines direct extrusion with two-step shearing, is developed to manufacture tubes made of wrought AZ31 magnesium alloy. To explore the deformation mechanisms of TES process, both experiment and numerical simulation are carried out. Three-dimensional finite element modeling is used to investigate the plastic deformation behaviors of wrought magnesium alloy during TES process. Experiments show that by use of TES process the microstructures can be refined to 50% of the original grain size and with more uniform grain distribution. TES process could improve hardness obviously by comparing which fabricated by direct extrusion. Numerical results indicate TES increases the cumulative strains effectively by direct extrusion and additional shearing.
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