The behavior of anisotropic fatigue short crack initiation and propagation for a directionally solidified superalloy CM247LC at room temperature
The behavior of anisotropic fatigue short crack initiation and propagation for a directionally solidified superalloy CM247LC at room temperature
The effects of mechanical and microstructural anisotropy on short fatigue crack initiation and propagation behaviors of a directionally solidified superalloy have been studied. An unusual result was found where the fatigue lives of specimens with grains longitudinally aligned along the loading direction fail at lower lifetimes than specimens with transversely loaded grains when the applied stress is close to the yield stress. This is mainly attributed to the lower Young's modulus of the longitudinal specimen, which induces more local plastic strain (at stress concentration features) leading to earlier crack initiation and faster crack propagation under the applied test stress.
fatigue short crack, mechanical property anisotropy, microstructural anisotropy, superalloys
3912-3926
Tan, Yuanguo
604fb4b1-5af5-4adb-af9b-76d605852546
Octaviani, Sari
cc26a221-0580-48d2-834a-836c8799d75b
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Reed, Philippa
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October 2023
Tan, Yuanguo
604fb4b1-5af5-4adb-af9b-76d605852546
Octaviani, Sari
cc26a221-0580-48d2-834a-836c8799d75b
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Tan, Yuanguo, Octaviani, Sari, Gao, Nong and Reed, Philippa
(2023)
The behavior of anisotropic fatigue short crack initiation and propagation for a directionally solidified superalloy CM247LC at room temperature.
Fatigue & Fracture of Engineering Materials & Structures, 46 (10), .
(doi:10.1111/ffe.14115).
Abstract
The effects of mechanical and microstructural anisotropy on short fatigue crack initiation and propagation behaviors of a directionally solidified superalloy have been studied. An unusual result was found where the fatigue lives of specimens with grains longitudinally aligned along the loading direction fail at lower lifetimes than specimens with transversely loaded grains when the applied stress is close to the yield stress. This is mainly attributed to the lower Young's modulus of the longitudinal specimen, which induces more local plastic strain (at stress concentration features) leading to earlier crack initiation and faster crack propagation under the applied test stress.
Text
Fatigue Fract Eng Mat Struct - 2023 - Tan
- Version of Record
More information
Accepted/In Press date: 13 July 2023
e-pub ahead of print date: 28 July 2023
Published date: October 2023
Additional Information:
Funding Information:
The authors would like to thank the EPSRC (Grant EP/M000710/1) for funding support, the China Scholarship Council, China for financial support, and Dr. Gordon McColvin at GE Power for providing the materials.
Publisher Copyright:
© 2023 The Authors. Fatigue & Fracture of Engineering Materials & Structures published by John Wiley & Sons Ltd.
Keywords:
fatigue short crack, mechanical property anisotropy, microstructural anisotropy, superalloys
Identifiers
Local EPrints ID: 481591
URI: http://eprints.soton.ac.uk/id/eprint/481591
ISSN: 8756-758X
PURE UUID: eef26cd1-09dd-43ed-abd0-ce68794a5ee6
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Date deposited: 04 Sep 2023 16:47
Last modified: 18 Mar 2024 02:53
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Author:
Yuanguo Tan
Author:
Sari Octaviani
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