Effect of additional shear strain layer on microstructure and tensile strength of fine wire

Effect of additional shear strain layer on microstructure and tensile strength of fine wire

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A hardened layer around 0.04 mm in depth, referred to as the “additional shear strain layer,” is generated beneath the surface layer of the wire, and the additional shear strain layer affects the tensile strength of fine wire. The purpose of this paper is to investigate the cause of an increase in tensile strength. The microstructure of the surface layer was made finer than that of the center layer. It was concluded that the tensile strength of the surface layer was greater than that of the center layer because of this crystal grain refinement.

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Description

A hardened layer around 0.04 mm in depth, referred to as the “additional shear strain layer,” is generated beneath the surface layer of the wire, and the additional shear strain layer affects the tensile strength of fine wire. The purpose of this paper is to investigate the cause of an increase in tensile strength. The microstructure of the surface layer was made finer than that of the center layer. It was concluded that the tensile strength of the surface layer was greater than that of the center layer because of this crystal grain refinement.

Additional information

Author(s)

Satoshi Kajino and Motoo Asakawa, Waseda University, Japan
Publication/Event/Pages

Paper presented at WAI's 76th Annual Convention (Wire Expo) in Boston, May, 2006. Published in WJI, January 2008, pp. 58-63.
Year

2006

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