In-situ dwell-fatigue fracture experiment and CPFE simulation of SLM AlSi10Mg alloy at high temperature

The creep-fatigue fracture behavior of selective laser melting (SLM) AlSi10Mg alloy was studied by conducting in-situ scanning electron microscopy experiments at 500 °C. Dwell times of 0, 60 and 120 s were introduced to the tensile-tensile fatigue. The experimental results indicated that the lifetim...

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Bibliographic Details
Published in:International journal of fracture 2022-05, Vol.235 (1), p.159-178
Main Authors: Wang, Zhen, Zhao, Chong, Wang, Jie, Wu, Wenwang, Li, Xide
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
Automotive Engineering
Characterization and Evaluation of Materials
Civil Engineering
Classical Mechanics
Crack initiation
Crack propagation
Creep fatigue
Deformation
Dwell time
Engineering
Experiments
Fatigue failure
Finite element method
Fracture mechanics
Heat resistant alloys
High temperature
Internal energy
Laser beam melting
Lasers
Manufacturing
Mechanical Engineering
Mechanical properties
Mechanics
Metal fatigue
Microstructure
Nucleation
Original Paper
Plastic deformation
Propagation
Scanning electron microscopy
Simulation
Strain
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Summary:The creep-fatigue fracture behavior of selective laser melting (SLM) AlSi10Mg alloy was studied by conducting in-situ scanning electron microscopy experiments at 500 °C. Dwell times of 0, 60 and 120 s were introduced to the tensile-tensile fatigue. The experimental results indicated that the lifetime decreased with lengthening of the dwell time from 0 to 120 s, which closely related to the deformation response behavior of the material. The process of the fracture evolution of the alloy was characterized and analyzed using in-situ scanning electron microscopy images and the fracture morphology. The creep-fatigue fracture mechanism of SLM AlSi10Mg alloy was revealed. Finally, combined with crystal plasticity finite element simulation, the Mises stress, plastic strain and elastic stored energy were used to explain the crack nucleation of SLM AlSi10Mg alloy under fatigue and dwell-fatigue.
ISSN:0376-9429
1573-2673
DOI:10.1007/s10704-022-00647-x