Crystal plastic modeling on fatigue properties for aluminum alloy friction stir welded joint

Sun, Guo-Qin; Chen, Yajing; Wei, Xinhai; Shang, De‐Guang; Chen, Shujun

doi:10.1016/j.msea.2018.04.112

Cited by 18 publications

(4 citation statements)

References 32 publications

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“…The strain rate sensitivity factor n is 20 and the reference shear strain rate γ˙0 is 0.001 [24]. Other parameters of different zones are determined by the try and error method [20].…”

Section: Macro-mesoscopic Joint Modelmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue Modeling Containing Hardening Particles and Grain Orientation for Aluminum Alloy FSW Joints

Sun

Guo

Xiao³

et al. 2019

Materials

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The macro-mesoscopic joint fatigue model containing hardening particles and crystal characteristics is established to study the effect of the hardening particles and the grain orientation on fatigue properties of an aluminum alloy friction stir welding (FSW) joint. The macroscopic model is composed of the weld nugget zone, thermo-mechanically affected zone, heat-affected zone, and base material, according to the metallurgical morphology and hardness distribution of the joint. Cyclic stress and strain data are used to determine the material properties. The fatigue parameters used in the calculation of cyclic stresses and strains are obtained with the four-point correlation method. The mesoscopic models of different zones are inserted into the joint macroscopic model as submodules. The models containing the information of hardening particles and grain orientation are established with crystal plasticity theory for the grains and isotropic hardening rule for the hardening particles. The effects of hardening particles and grain orientation on the stress and strain responses are discussed. The simulation results show that high-angle misorientation of adjacent grains hinders the stress transfer. The particle cluster or cracked particles intensify the stress and strain concentrations.

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“…The strain rate sensitivity factor n is 20 and the reference shear strain rate γ˙0 is 0.001 [24]. Other parameters of different zones are determined by the try and error method [20].…”

Section: Macro-mesoscopic Joint Modelmentioning

confidence: 99%

“…Fatigue behavior and weak areas of the FSW joint were simulated with an FSW joint model including the characteristics of hardening phases [19]. The local mechanical response and fatigue life prediction of 2219 FSW joints were proceeded based on crystal plasticity modeling for the FSW joint [20].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Modeling Containing Hardening Particles and Grain Orientation for Aluminum Alloy FSW Joints

Sun

Guo

Xiao³

et al. 2019

Materials

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“…The crack initiation position was on the surface of the sample which was related to material flow, heat, and distribution of some intermetallic compounds [23,25]. In the NZ region, the dynamic recrystallization process reduced the residual stress, and hence improved fatigue performance [7,24,33]. In addition, the crack initiation area was affected by defects such as porosity and inclusions.…”

Section: Fractographymentioning

confidence: 99%

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Gao

2018

Applied Sciences

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The application fields of friction stir welding technology, such as aerospace and transportation, has high safety requirements and fatigue is the dominant failure mode for weldments. It is of great significance to understand the fatigue properties of friction stir welded joints. This paper provides an overview of the fatigue mechanism, influencing factors, crack growth rate, and fatigue life assessment. It is found that the fatigue performance of friction stir welded joints can be affected by welding process parameters, test environment, stress ratio, residual stress, and weld defect. The optimized process parameters can produce high quality weld and increase the weld fatigue life. Laser peening is an effective post weld treatment to decrease fatigue crack growth rate and improve material fatigue life.

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“…The strain rate sensitivity factor and reference shear strain rate are 20 and 0.001. 9 Other parameters were determined by try and error method, and the fitted stress-strain curves were verified by experimental data. The initial hardening modulus, shear stress saturation and initial yield shear stress are 101.8, 60.5, and 40.5 MPa, respectively.…”

Section: Finite Element Simulationmentioning

confidence: 99%

Experimental and crystal plasticity simulation on fatigue crack of wire and arc additively manufactured aluminum alloy

Sun

Guo

et al. 2021

Fatigue Fract Eng Mat Struct

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Crystal plastic modeling on fatigue properties for aluminum alloy friction stir welded joint

Cited by 18 publications

References 32 publications

Fatigue Modeling Containing Hardening Particles and Grain Orientation for Aluminum Alloy FSW Joints

Fatigue Modeling Containing Hardening Particles and Grain Orientation for Aluminum Alloy FSW Joints

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Experimental and crystal plasticity simulation on fatigue crack of wire and arc additively manufactured aluminum alloy

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