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RESEARCH PAPERS

Effect of Prestrain at Elevated Temperature on the Fracture Behavior of High Strength Steels

[+] Author and Article Information
K. Satoh, M. Toyoda

Osaka University, Suita, 565 Japan

Y. Mutoh

Technological University of Nagaoka, Nagaoka-shi, 949-54 Japan

J. Eng. Mater. Technol 105(1), 16-20 (Jan 01, 1983) (5 pages) doi:10.1115/1.3225612 History: Received February 17, 1982; Online September 15, 2009

Abstract

It is well known that fracture initiation behavior is influenced by weld thermal straining. In the present report, attention is focused on the influence of weld thermal straining on the fracture mechanism. The influence of prestrain at elevated temperature or strain-aging on the initiation and propagation behaviors of ductile and cleavage fracture in KD32 and HT80 steels is investigated. A relationship between the increase in the lowest temperature at which a tear dimple region can be observed (Ti ) or the decrease in stretched zone width and the increase in hardness at the notch tip is found.

Copyright © 1983 by ASME
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