High Temperature Low Cycle Fatigue and Cyclic Constitutive Relation of MAR-M247 Directionally Solidified Superalloy

[+] Author and Article Information
Tadashi Hasebe

Faculty of Engineering, Kyoto University, Honmachi Yoshida Sakyo-ku Kyoto, 606, Japan

Masao Sakane, Masateru Ohnami

Department of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University, Kyoto, 603, Japan

J. Eng. Mater. Technol 114(2), 162-167 (Apr 01, 1992) (6 pages) doi:10.1115/1.2904156 History: Received June 20, 1990; Revised October 08, 1991; Online April 29, 2008


This paper investigates the effect of solidification direction on cyclic constitutive relation and low cycle fatigue life for a directionally solidified (DS) superalloy Mar-M247LC at 1173 K in air. Strain controlled push-pull low cycle fatigue tests were carried out for three kinds of specimens of which loading direction was 0, 45 and 90 deg to DS axis. The 0 deg specimen exhibited the largest fatigue strength, the 45 deg specimen the smallest and the 90 deg specimen the intermediate. The difference in the fatigue strength due to the loading direction was discussed in detail from the viewpoint of the anisotropy of Young’s modulus. A life prediction method for DS specimens, considering the anisotropy of the Young’s modulus, was proposed and successfully applied to the low cycle fatigue data.

Copyright © 1992 by The American Society of Mechanical Engineers
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