On strain and damage interactions during tearing: 3D in situ measurements and simulations for a ductile alloy (AA2139-T3)

Morgeneyer, Thilo F.; Taillandier-Thomas, Thibault; Buljac, Ante; Helfen, Lukas; Hild, François

doi:10.1016/j.jmps.2016.07.012

Cited by 34 publications

(43 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, CT-like specimens were chosen to carry out in situ tests [35,34,38] to gain new insights into these mechanisms. The combined use of laminography [18,20,19] and global Digital Volume Correlation (DVC) [51] has enabled in situ displacement elds to be measured at the microscale.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

et al. 2018

Self Cite

View full text Add to dashboard Cite

The deformation and damage micromechanisms ahead of a notch in a large at specimen have been assessed using in situ synchrotron laminography combined with digital volume correlation for the strain evaluation in the material bulk. Despite the enhanced work hardening of the naturally aged Al-Cu-Li alloy several slanted strained bands were found from very early loading onward in the slanted fracture region. The nal slanted crack followed one of the strained bands without signicant ductile damage growth. In the high stress triaxiality region, close to the notch that underwent substantial local necking, two damage micromechanisms were observed, namely, i) limited void nucleation and growth from intermetallic particles, and ii) slanted shear cracks, even starting from the specimen surface and also located in single

show abstract

Section: Introductionmentioning

confidence: 99%

“…2198 (Al-Cu-Li) aluminium alloys have been studied under naturally and articially aged conditions, thereby changing the nano-precipitate structure and the work hardening behavior [35,34,53,9,38]. Representing the latest generation of aeronautical alloys, and understanding the underlying failure mechanisms is of great interest.…”

Section: Introductionmentioning

confidence: 99%

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, DSA cannot be ignored in complex forming operations, despite possibly evanescent manifestations in monotonic loading. Recent in-situ experimental studies combining X-ray laminography and 3D digital image correlation methods during Kahn tear tests on a AA-2198-T8 rolled material, and on other similar alloys, clearly evidenced the occurrence of early plastic strain localization [13,30]. It was observed that intense plastic localization bands form away from the crack tip at the very beginning of deformation, and these bands are intermittent in time but not in space.…”

Section: Introductionmentioning

confidence: 99%

“…Motivated by the above studies [13,30,26], present work contributes to further investigation in terms of modeling the role of crystal orientations, plastic anisotropy, grain neighborhood, and grain-to-grain interactions on the intensity of dynamic strain aging effects. In a recent study, simple model lamellar grain structures representative of rolled microstructures were modeled, using experimentally reported preferred crystal orientations [31].…”

Section: Introductionmentioning

confidence: 99%

Crystal Plasticity Modeling of the Effects of Crystal Orientation and Grain-to-Grain Interactions on DSA-Induced Strain Localization in Al-Li Alloys

et al. 2019

View full text Add to dashboard Cite

We develop a crystal plasticity model to investigate the coupled actions of crystal orientation, grain neighborhood and grain-to-grain elasto-plastic interactions on dynamic strain aging (DSA) and the onset and development of associated plastic strain localization in Al-Li alloys. Considering simple model multilayered microstructures with preferred orientations representative of rolled alloys, the aim is to identify grain orientation couples that can limit dynamic strain aging induced strain localization without compromising the flow stress and strain hardening properties. To this end, a slip system-based formulation of dynamic strain aging is implemented in a crystal plasticity finite element framework. The model validity is first checked with the simulation of a tensile specimen loaded at quasi-static applied strain rate. The introduction of dynamic strain aging allows predicting complex propagation of intense plastic localization bands. We further investigate the influence of crystal orientations on early strain localization in Al-Cu-Li-Mg alloys, by performing simulations representative of the early stage of a Kahn Tear test for single crystals and layered polycrystals. Using experimentally reported crystal orientations for rolled microstructures, the simulation results show that in both single and multilayered crystals, there is a strong influence of dynamic strain aging on localization patterns, as well as a significant orientation dependence. In multilayered crystals, the nature of strain localization can be remarkably modified when stand-alone crystals of a certain orientation are coupled with other orientations: strain localization may intensify or fades away depending on the coupling with neighboring orientations.

show abstract

“…It is worth noting that some damage variables such as porosity can now be observed experimentally thanks to X-ray imaging techniques [11,12,13,14]. Inclusions and voids can be studied individually based on manual [13,15] or automatic [14] procedures.…”

Section: Introductionmentioning

confidence: 99%

Experimental-Numerical Validation Framework for Micromechanical Simulations

Buljac

Shakoor

Neggers

et al. 2017

Multiscale Modeling of Heterogeneous Structures

Self Cite

View full text Add to dashboard Cite

A combined experimental-numerical framework is presented in order to validate computations at the microscale. It is illustrated for a flat specimen with two holes, which is made of cast iron and imaged via in situ synchrotron laminography at micrometer resolution during a tensile test. The region in the reconstructed volume between the two holes is analyzed via Digital Volume Correlation (DVC) to measure displacement fields. Finite Element (FE) simulations, whose mesh is made consistent with the studied material microstructure, are driven by measured Dirichlet boundary conditions. Damage levels and gray level residuals for DVC measurements and FE simulations are assessed for validation purposes.

show abstract

On strain and damage interactions during tearing: 3D in situ measurements and simulations for a ductile alloy (AA2139-T3)

Cited by 34 publications

References 60 publications

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

On deformation and damage micromechanisms in strong work hardening 2198 T3 aluminium alloy

Crystal Plasticity Modeling of the Effects of Crystal Orientation and Grain-to-Grain Interactions on DSA-Induced Strain Localization in Al-Li Alloys

Experimental-Numerical Validation Framework for Micromechanical Simulations

Contact Info

Product

Resources

About