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Metals 2019, 9(2), 180; https://doi.org/10.3390/met9020180

A Fatigue Life Prediction Model Based on Modified Resolved Shear Stress for Nickel-Based Single Crystal Superalloys

1
School of Energy and Power Engineering, Beihang University, Beijing 100191, China
2
Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Received: 4 January 2019 / Revised: 27 January 2019 / Accepted: 29 January 2019 / Published: 2 February 2019
(This article belongs to the Special Issue Fatigue and Fracture of Traditional and Advanced Structural Alloys)
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Abstract

In this paper, the viewpoint that maximum resolved shear stress corresponding to the two slip systems in a nickel-based single crystal high-temperature fatigue experiment works together was put forward. A nickel-based single crystal fatigue life prediction model based on modified resolved shear stress amplitude was proposed. For the four groups of fatigue data, eight classical fatigue life prediction models were compared with the model proposed in this paper. Strain parameter is poor in fatigue life prediction as a damage parameter. The life prediction results of the fatigue life prediction model with stress amplitude as the damage parameter, the fatigue life prediction model with maximum resolved shear stress in 30 slip directions as the damage parameter, and the McDiarmid (McD) model, are better. The model proposed in this paper has higher life prediction accuracy. View Full-Text
Keywords: fatigue; nickel-based single crystal superalloy; life modeling; resolved shear stress fatigue; nickel-based single crystal superalloy; life modeling; resolved shear stress
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Wang, J.; Wei, D.; Wang, Y.; Jiang, X. A Fatigue Life Prediction Model Based on Modified Resolved Shear Stress for Nickel-Based Single Crystal Superalloys. Metals 2019, 9, 180.

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