Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading

Zheng, Zebang; Peng, Zichao

doi:10.3390/cryst12020269

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Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading

by

Zebang Zheng

^1,2,*,† and

Zichao Peng

^3,*,†

¹

Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Northwestern Polytechnical University, Shenzhen 518057, China

²

State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China

³

Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, AECC, Beijing 100095, China

^*

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Crystals 2022, 12(2), 269; https://doi.org/10.3390/cryst12020269

Submission received: 18 January 2022 / Revised: 8 February 2022 / Accepted: 16 February 2022 / Published: 16 February 2022

(This article belongs to the Section Crystalline Metals and Alloys)

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Abstract

The microstructural effect, including γ’ precipitate morphology and twin grains, of dwell fatigue behavior in a powder metallurgy nickel-based superalloy, was studied using crystal plasticity modeling. Strain rate and dwell sensitivities of 923 K were quantitatively investigated. The strain accumulations, under normal and dwell fatigue loading, showed γ’ precipitate size-dependence. Strong load shedding can be observed between parent and twin grains, which was attributed to local plastic heterogeneity. Local stress and strain evolution are both faster than the macroscopic values, which threatens the safety of engine components.

Keywords: load shedding; microstructure; size effect; γ’ precipitate; dwell fatigue

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MDPI and ACS Style

Zheng, Z.; Peng, Z. Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading. Crystals 2022, 12, 269. https://doi.org/10.3390/cryst12020269

AMA Style

Zheng Z, Peng Z. Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading. Crystals. 2022; 12(2):269. https://doi.org/10.3390/cryst12020269

Chicago/Turabian Style

Zheng, Zebang, and Zichao Peng. 2022. "Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading" Crystals 12, no. 2: 269. https://doi.org/10.3390/cryst12020269

APA Style

Zheng, Z., & Peng, Z. (2022). Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading. Crystals, 12(2), 269. https://doi.org/10.3390/cryst12020269

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Crystal Plasticity Simulation of the Microstructural Effect in Powder Metallurgy Superalloys under Dwell Fatigue Loading

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