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RESEARCH PAPERS

Influence of the Application of Quick Thermal Welding Cycles in the Toughness of Carbon Steels Susceptible to Aging

[+] Author and Article Information
S. Prata

Metallurgy and Welding Dept., SOREFAME, Amadora, Portugal

J. Eng. Mater. Technol 97(1), 74-80 (Jan 01, 1975) (7 pages) doi:10.1115/1.3443264 History: Received May 16, 1974; Online August 17, 2010

Abstract

A number of cases of brittle fracture in welded structures can be explained by an accelerated aging resulting from the use of welding thermal cycles on strain-hardened steels. This paper presents new experimental results of an investigation of this phenomenon as well as a rationale for it. Results on rimmed steels indicate that there is a critical temperature, below the A1 transformation point, which results in the maximum loss of notch toughness. The magnitude of the embrittlement suggests that the standard test recommended for strain aging susceptibility of these steels should be modified to provide better measure of the effect. Some further practical recommendations are made about these steels.

Copyright © 1975 by ASME
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