Effects of Extremes of Hardness and Mean Stress on Fatigue of AISI 4340 Steel in Bending and Torsion

[+] Author and Article Information
W. N. Findley

Brown University, Providence, R.I. 02912

J. Eng. Mater. Technol 111(2), 119-122 (Apr 01, 1989) (4 pages) doi:10.1115/1.3226442 History: Received May 22, 1987; Online September 15, 2009


Experiments are reported for fatigue tests in bending and in torsion at hardness levels from fully annealed to fully hard and super quenched. Results indicate a linear relation between fatigue strength and Brinell hardness. The relation between bending and torsion and the effects of mean stress and size are also examined.

Copyright © 1989 by ASME
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