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RESEARCH PAPERS: Additional Technical Papers

Prevention of Fracture of Cracked Steel Bars Using Laser: Part II—Laser Welding

[+] Author and Article Information
Akira Kato

Department of Mechanical Engineering, Chubu University, Matsumoto-cho, Kasugai, Aichi 487, Japan

J. Eng. Mater. Technol 108(1), 63-67 (Jan 01, 1986) (5 pages) doi:10.1115/1.3225843 History: Received April 17, 1985; Online September 23, 2009

Abstract

This paper investigates the effect of laser welding on the prevention of fracture of cracked steel specimens. Precracks occurred in shaft specimens of SAE 1015 were welded by a CO2 laser, and then the rotary bending fatigue and static tensile tests were executed. Both strengths of fatigue and tensile of specimens having a diameter 11mm with a fairly large precrack 13mm long could be raised up to that of virgin specimens. It was shown that laser welding is very effective for the fracture prevention of cracked steel shafts.

Copyright © 1986 by ASME
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