RESEARCH PAPERS: Additional Technical Papers

The Role of Microcracks in Large Plastic Deformation

[+] Author and Article Information
L. H. S. Luong, R. H. Brown

CSIRO Division of Manufacturing Technology, Woodville, S.A. 5011, Australia

J. Eng. Ind 103(4), 431-436 (Nov 01, 1981) (6 pages) doi:10.1115/1.3184508 History: Received September 27, 1979; Revised May 26, 1980; Online July 30, 2009


This paper describes the results obtained from shear-compression tests carried out at low strain rates and at strain rates equivalent to those in a typical machining operation. These tests together with metallographic work are used to explain the influence of microcracks on the flow stress of work material. It is shown that the negative work-hardening effect observed at large strain deformation in the presence of compressive stresses is associated with the behavior of microcracks. A mechanism is proposed to account for this phenomenon.

Copyright © 1981 by ASME
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