Influence of Superimposed Hydrostatic Pressure on Bending Fracture and Formability of a Low Carbon Steel Containing Globular Sulfides

[+] Author and Article Information
A. S. Kao, H. A. Kuhn, W. A. Spitzig, O. Richmond

IBM Research Division, Almaden Research Center, San Jose, CA 95120-6099

J. Eng. Mater. Technol 112(1), 26-30 (Jan 01, 1990) (5 pages) doi:10.1115/1.2903182 History: Received December 09, 1988; Revised June 25, 1989; Online April 29, 2008


Bend tests under superimposed hydrostatic pressure were carried out on a low carbon steel containing globular sulfide inclusions to investigate the variation of ductile fracture and forming limits due to supression of void growth. Results show that increasing pressure enhances formability, as expressed by increasing intercept and decreasing slope of the forming limit line, due to a pressure-induced transition in fracture mechanism. A continuum mechanical model based on the growth and coalescence of voids under applied pressure is proposed that explains the experimental results and predicts the fracture limit under actual metalforming conditions.

Copyright © 1990 by The American Society of Mechanical Engineers
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