Anisotropy and tension–compression asymmetry modeling of the room temperature plastic response of Ti–6Al–4V

Tuninetti, Víctor; Gilles, Gaëtan; Milis, Olivier; Pardoen, Thomas; Habraken, Anne Marie

doi:10.1016/j.ijplas.2014.10.003

Cited by 102 publications

(77 citation statements)

References 50 publications

(56 reference statements)

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“…1(a). The elasto-viscoplastic behavior of this bulk alloy has been previously characterized by Tuninetti and Habraken [10] and Tuninetti et al [7]. Plasticity characterization.…”

Section: Identification Of Materials Parametersmentioning

confidence: 85%

“…The first model is based on the Hill '48 [5] yield criteria, which takes into account the anisotropic behavior of Ti-6AL-4V alloy. The second model is defined by the orthotropic yield criterion CPB06 that accounts for both the anisotropy and the strength differential effect of the alloy [7]. The third one predicts damage by the extended version of the GTN model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Damage and Anisotropic Plasticity Models to Predict Ti-6Al-4V Behavior

Guzmán

Tuninetti

Gilles

et al. 2015

KEM

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Abstract. The plastic behavior of the Ti-6Al-4V alloy includes several features as strength differential effect, anisotropy and yield strength sensitivity to temperature and strain rate. Monotonic tensions in the three orthogonal directions of the material are performed to identify the Hill '48 yield criterion. Monotonic compression and plane strain tensile tests are also included in the experimental campaign to identify the orthotropic yield criterion of CPB06. An assessment of the two models is done by comparing the yield loci and the experimental data points for different levels of plastic work. A first approach of the damage modelling of the Ti-6AL-4V alloy is investigated with an extended GursonTvergaard-Needleman damage model based on Hill '48 yield criterion. Finite element simulations of the experiments are performed and numerical results allows checking force-displacement curves until rupture and local information like displacement and strain fields. The prediction ability of the Hill '48, CPB and extended Gurson models are assessed on simple shear and notched tensile tests until fracture.

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“…1(a). The elasto-viscoplastic behavior of this bulk alloy has been previously characterized by Tuninetti and Habraken [10] and Tuninetti et al [7]. Plasticity characterization.…”

Section: Identification Of Materials Parametersmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Assessment of Damage and Anisotropic Plasticity Models to Predict Ti-6Al-4V Behavior

Guzmán

Tuninetti

Gilles

et al. 2015

KEM

View full text Add to dashboard Cite

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“…Tensile cases are found to be stronger than that of compression in high strength Ti-3Al-2.5V alloys (Li et al 2016). However, the opposite trend is observed in Ti6Al-4V (Tuninetti et al 2015). Various microstructure and mechanism dependent observations can be found while investigating the origin of asymmetry.…”

Section: High Temperature Plastic Anisotropy and And Tensioncompressimentioning

confidence: 95%

“…A recent version of polysynthetically twinned (PST) single crystals like lamellar intermetallic Ti-45Al-8Nb has been proposed to be used till 900°C . The growing application has also been extended to petroleum, medical, and defense industries (Khan et al 2012;Tuninetti et al 2015). Since 1970s, this alloy system has been widely recognized as a possible basis for novel lightweight materials for high temperature applications (Zambaldi 2010).…”

Section: The Family Of Ti-al Alloysmentioning

confidence: 99%

“…These alloys exhibit impressive material properties such as very good strength, high specific yield strength and stiffness, good oxidation and ignition resistance combined with good creep properties at high temperatures, fracture toughness, corrosive resistance, low density, high thermal capability, and biocompatibility, etc. (Appel et al 2016;Khan et al 2012;Tuninetti et al 2015). Sufficient strength at high temperature and ductility at ambient temperature are crucial issues for these lightweight alloys.…”

Section: The Family Of Ti-al Alloysmentioning

confidence: 99%

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Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

Chowdhury

Altenbach

Krüger

et al. 2017

Mech Adv Mater Mod Process

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In the last decades, the class of Ti-rich TiAl-based intermetallic materials has replaced many contemporary alloys till 900°C. Due to higher oxidation resistance, 20% lower density and higher (about 150°C more) operating temperature possibility of Al-rich TiAl alloys over Ti-rich side, phases from the Al-rich region of this alloy system are considered to be highly potential candidates for high temperature structural applications. Although there are a lot of works about Ti-rich alloys, however, investigation from the Al-rich side is very limited. This work reviews the class of Al-rich TiAl alloys in terms of phases, microstructures, morphology, deformation mechanisms, mechanical behaviors along with a possible micromechanical modeling approach. Single crystal like Ti-61.8at.%Al alloy from the Al-rich family has been chosen as an example for modeling high temperature anisotropy and tension-compression asymmetry. A possible comparison with Ti-rich side is also presented.

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Indentation Response and Structure‐Property Correlation in a Bimodal Ti–6Al–4V Alloy

2017

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Understanding the deformation behavior of multi-phase alloys under external loading requires careful mechanical characterization of the individual constituent phases at various length scales. The present study first evaluates the elastic moduli and hardness of the microstructural constituents viz. primary a (a p ) and transformed b (secondary a (a s ) plus retained prior b) phases in a bimodal Ti-6Al-4V alloy by nanoindentation using different loads. The bulk mechanical properties of the overall microstructure are then determined by grid wise nano-indentation, as well as micro-indentation. The alloy shows a pronounced indentation size effect; the hardness increases with the decrease in indentation load, or depth of penetration. Assuming an iso-stress condition for individual constituents (a p and transformed b) in the rule of mixture approach, the bulk mechanical properties of the Ti-6Al-4V alloy are reasonably predicted. Such prediction of bulk properties, however, is not possible when a similar calculation is performed using iso-strain condition. The transformed b phase shows disparity between the estimated and experimental values, while considering the a s and b phases individually, on both iso-stress and iso-strain assumptions. From these results, the influence of individual microstructural phases (size, distribution, volume fraction, morphology) and the interfaces between them, is found key in controlling the overall bulk mechanical response of the alloy system. KeywordsNano and micro-indentation, bimodal Ti-6Al-4V, indentation size effect, rule of mixture, iso-stress and iso-strain, grain boundary and interface

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Anisotropy and tension–compression asymmetry modeling of the room temperature plastic response of Ti–6Al–4V

Cited by 102 publications

References 50 publications

Assessment of Damage and Anisotropic Plasticity Models to Predict Ti-6Al-4V Behavior

Assessment of Damage and Anisotropic Plasticity Models to Predict Ti-6Al-4V Behavior

Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

Indentation Response and Structure‐Property Correlation in a Bimodal Ti–6Al–4V Alloy

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