Temperature and Load Ratio Effects on Crack-Growth Behavior of Austenitic Superalloys
Document Type
Conference Proceeding
Publication Date
11-2-2009
Publication Title
Journal of Engineering Materials and Technology
Publisher
American Society of Mechanical Engineers
First page number:
0110011
Last page number:
0110017
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.
Keywords
Alloys; Austenitic steel – Cracking; Austenitic steel – Fatigue; Austenitic steel – Fracture; Crack propagation; Fracture (Materials); Strains and stresses; Stress corrosion; Super alloys; Temperature; Testing
Disciplines
Materials Science and Engineering | Mechanics of Materials | Metallurgy
Language
English
Permissions
Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.
Repository Citation
Roy, A. K.,
Pal, J.,
Hasan, M. H.
(2009).
Temperature and Load Ratio Effects on Crack-Growth Behavior of Austenitic Superalloys.
Journal of Engineering Materials and Technology
0110011-0110017.
American Society of Mechanical Engineers.