Temperature and Load Ratio Effects on Crack-Growth Behavior of Austenitic Superalloys-Reference-Cited by-同舟云学术

Temperature and Load Ratio Effects on Crack-Growth Behavior of Austenitic Superalloys

Published:2009-11-02 Issue:1 Volume:132 Page:
ISSN:0094-4289
Container-title:Journal of Engineering Materials and Technology
language:en
Short-container-title:

Author:

Roy Ajit K.¹,Pal Joydeep¹,Hasan Muhammad H.¹

Affiliation:

1. Department of Mechanical Engineering, University of Nevada, Las Vegas (UNLV), 4505 Maryland Parkway, P.O. Box 454027, Las Vegas, NV 89154-4027

Abstract

The role of temperature and load ratio (R) on the crack propagation rate (da/dN) of Alloys 276 and 617 under cyclic loading was investigated. The results indicate that the rate of cracking was gradually enhanced with increasing temperature when the R value was kept constant. However, the temperature effect was more pronounced at 100–150°C. Both alloys exhibited maximum da/dN values at a load range of 4.5 kN that corresponds to an R value of 0.1. The number of cycles to failure for Alloy 276 was relatively higher compared with that of Alloy 617, indicating its slower crack-growth rate. Fractographic evaluation of the broken specimen surface revealed combined fatigue and ductile failures.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/materialstechnology/article-pdf/doi/10.1115/1.3184027/5880627/011001_1.pdf

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