Effect of Grain Flow Orientation on Rolling Contact Fatigue Life of AISI M-50

[+] Author and Article Information
A. H. Nahm

Aircraft Engine Business Group, General Electric Company, Cincinnati, Ohio 45215

J. of Lubrication Tech 104(3), 330-334 (Jul 01, 1982) (5 pages) doi:10.1115/1.3253213 History: Received February 20, 1981; Online November 13, 2009


Accelerated rolling contact fatigue tests were conducted to study the effect of grain flow orientation on the rolling contact fatigue life of vacuum induction melted and vacuum arc remelted (VIM-VAR) AISI M-50. Cylindrical test bars were prepared from a billet with 0, 45, and 90 deg orientations relative to billet forging flow direction. Tests were run at a Hertzian stress of 4,826 MPa with a rolling speed of 12,500 rpm at room temperature, and lubricated with Type I (MIL-L-7808G) oil. It was observed that rolling contact fatigue life increased when grain flow line direction became more parallel to the rolling contact surface.

Copyright © 1982 by ASME
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