Parametric Study of Cyclic Plasticity Behavior in a Directionally Solidified Superalloy with Partial Recrystallization by Crystal Plasticity Finite Element Simulation

To understand the influence of recrystallization on the low-cycle fatigue behavior of directionally solidified nickel-based DZ4 superalloy, crystal plasticity-based finite element (CPFE) analysis was carried out to study the cyclic plastic behaviors. Using the design of experiments (DOE) technique,...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2019-06, Vol.28 (6), p.3332-3340
Main Authors: Ma, Xianfeng, Wei, Donghui, Han, Qinan, Rui, Shaoshi, Su, Dongchuan, Yang, Weiqi, He, Zhiwu, Xiao, Jinfang, Wu, Yawen, Shi, Hui-ji
Format: Article
Language:English
Subjects:
ASPECT RATIO
CARBIDES
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
CRACK PROPAGATION
CRYSTALS
DESIGN
Engineering Design
FINITE ELEMENT METHOD
GRAIN BOUNDARIES
HEAT RESISTING ALLOYS
MATERIALS SCIENCE
MATRICES
NICKEL
PARAMETRIC ANALYSIS
PLASTICITY
PLASTICS
Quality Control
RECRYSTALLIZATION
Reliability
Safety and Risk
SIMULATION
STRAINS
Tribology
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Summary:To understand the influence of recrystallization on the low-cycle fatigue behavior of directionally solidified nickel-based DZ4 superalloy, crystal plasticity-based finite element (CPFE) analysis was carried out to study the cyclic plastic behaviors. Using the design of experiments (DOE) technique, a series of CPFE simulations were designed and performed for DZ4 superalloy with recrystallized grains to examine the cyclic plastic shear deformation at the carbide/matrix interface, at the recrystallized grain boundary/matrix, and in the matrix. Seven influence factors, i.e., applied strain, strain ratio, carbide modulus, dwell time, misorientation angle, carbide aspect ratio, and carbide size, were considered, and the effects of which were quantitatively evaluated by the maximum accumulated plastic shear strains via CPFE-based DOE analysis. The results showed that carbide and recrystallized grain boundary had competitively significant effects on fatigue crack initiation. Applied strain was the most influential parameter among all the studied parameters.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-019-04124-w