TORSIONAL SEVERE PLASTIC DEFORMATION METHOD FOR METAL BAR, EMPLOYING SURFACE POLISHING TO IMPROVE MECHANICAL PROPERTIES OF METAL BAR
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United States of America
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Jan 9, 2020
app pub date -
Feb 6, 2018
filing date -
Feb 6, 2018
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Abstract
The present invention relates to a torsional severe plastic deformation method for a metal bar to which surface polishing is applied to the metal bar to improve the mechanical properties of the metal bar. According to an embodiment of the present invention, there is provided a torsional severe plastic deformation method for a metal bar, which includes: applying torsion to a metal bar; and removing a surface defect on the surface of the metal bar, the surface defect being caused by the applying of torsion, wherein the removing of the surface defect is carried out in a continuous manner in which the removing of the surface defect is performed together with the applying of torsion or in a discontinuous manner in which the applying of torsion is temporarily stopped and then the applying of torsion is performed, and the removing of a surface defect increases the amount of torsional rotation or the shear strain applied to the metal bar.
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