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RESEARCH PAPERS

Redundant Deformation Factor Evaluation Through the Hardness Profile Method in Round Section Bar Drawing

[+] Author and Article Information
Paulo Roberto Cetlin

Department of Metallurgical Engineering, Universidade Federal de Minas Gerais, 30.000 – Belo Horizonte – MG – Brazil

J. Eng. Mater. Technol 106(2), 147-151 (Apr 01, 1984) (5 pages) doi:10.1115/1.3225689 History: Received November 29, 1982; Online September 15, 2009

Abstract

The increase in strength of bars caused by drawing is associated to the average deformation (ε ) imparted to the material by processing. This paper discusses the hardness profile method for evaluating the redundant deformation factor φ, which in turn allows the calculation of ε . For one drawing pass the results obtained are compatible with those from other theories, but it seems that a previous experimental hardness profile evaluation of ε in the literature involved improper calculations. For two successive passes a generalized definition of φ is forwarded. These passes work harden the material less than expected by the external deformation in the bar, and no current theories for φ calculation are adequate for more than one drawing pass.

Copyright © 1984 by ASME
Topics: Deformation
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