Development of Severe Torsion Straining Process for Rapid Continuous Grain Refinement
Development of Severe Torsion Straining Process for Rapid Continuous Grain Refinement
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DOI：
10.2320/matertrans.45.3338
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发表时间：
2004-12
影响因子：
1.2
通讯作者：
Katsuaki Nakamura;K. Neishi;K. Kaneko;M. Nakagaki;Z. Horita
中科院分区：
文献类型：
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作者：
Katsuaki Nakamura;K. Neishi;K. Kaneko;M. Nakagaki;Z. Horita
本研究提出了一种通过严重塑性变形(SPD)快速连续细化金属材料的晶粒的工艺。介绍了该工艺的原理，并在Al-5056合金和S45C碳钢上进行了应用。新工艺在本研究中称为严重扭转应变工艺(STSP)，包括在棒材中产生局部加热区，并通过一端与另一端的旋转将扭转应变引入该区域。这个过程是连续的，因为在移动棒子时实现了应变，从而使加热区沿着棒子移动。STSP不需要使用任何模具，可以适用于管道或电线。用光学显微镜和透射电子显微镜证实了STSP产生的细晶结构。对拉伸性能进行了测量，并与未应变的完全退火态样品进行了比较。从转速和运动速度两个方面讨论了STSP的可行性。
This study presents a rapid continuous process for grain refinement in metallic materials through severe plastic deformation (SPD). The principle is described and the process is applied to an Al-5056 alloy and an S45C carbon steel. The new process, designated in this study the severe torsion straining process (STSP), consists of producing a local heated zone in a rod and introducing torsion strain into the zone by rotating one end with the other. The process is continuous because the straining is achieved while the rod is moved so that the heated zone is shifted along the rod. The STSP does not require the use of any die and can be applicable to pipes or wires. Fine-grained structures produced with the STSP are confirmed using optical microscopy and transmission electron microscopy. Tensile properties are measured and compared with the unstrained fully annealed samples. The feasibility of the STSP is discussed with respect to the rotation speed and moving speed.