Micromechanical Modeling of the Elasto-Viscoplastic Behavior and Incompatibility Stresses of β-Ti Alloys

Lhadi, Safaa; Chini, Maria-Rita; Richeton, Thiebaud; Gey, Nathalie; Germain, Lionel; Berbenni, Stéphane

doi:10.3390/ma11071227

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…Near β titanium alloys are considered as excellent alternatives to replace steels for structural applications in the aerospace industry due to their high specific strength, good corrosion resistance, and fatigue crack growth resistance [1,2,3,4,5]. For instance, the Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy and the Ti-10V-2Fe-3Al (Ti-1023) alloy have been applied on landing gear forgings for Airbus-350 and Boeing 777, respectively [6,7].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Secondary α Phase during Aging Treatment in Novel near β Ti-6Mo-5V-3Al-2Fe Alloy

et al. 2018

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Evolution of secondary α phase during aging treatment of a novel near β titanium alloy Ti-6Mo-5V-3Al-2Fe(wt.%) was studied by OM, SEM, and TEM. Results indicated that size and distribution of secondary α phase were strongly affected by aging temperature and time. Athermal ω phase formed after super-transus solution treatment followed by water quenching, and promoted nucleation of needle-like intragranular α in subsequent aging process. When aged at 480 °C, fine scaled intragranular α with small inter-particle spacing precipitated within β grains and high ultimate tensile strength above 1500 MPa was achieved. When the aging temperature increased, the size and inter-particle spacing of intragranular α increased and made the strength reduce, but the ductility got improved. When aging temperature reached as high as 600 °C, ω phase disappeared and intragranular α coarsened obviously, resulting in serious decrease of strength. While mutually parallel Widmanstätten α laths formed at the vicinity of β grain boundaries and grew into the internal area of β grains, and significant improvement of ductility was achieved. As the aging time increased from 4 h to 16 h at 600 °C, the intragranular α grew slightly and brought about minor change of mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Evolution of Secondary α Phase during Aging Treatment in Novel near β Ti-6Mo-5V-3Al-2Fe Alloy

et al. 2018

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“…A one-site elasto-viscoplastic self-consistent (EVPSC) scheme, formulated using the translated field method and a first order affine approximation, is used. It has been described in detail elsewhere [5,15] and only a brief description of the single crystal law employed is presented. The simulations are performed under the infinitesimal small strain assumptions, where the total strain rate tensor ( ), calculated from the generalized Hooke's law, and the nonlinear viscoplastic strain rate tensor ( ).…”

Section: Iii1 Single Grain Cons Tu Ve Behavior In α/β Phasesmentioning

confidence: 99%

Stress partitioning in a near-β Titanium alloy induced by elastic and plastic phase anisotropies: experimental and modeling

et al. 2020

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The load transfer induced by the elastic and plastic phase anisotropies of a Ti–10V–2Fe–3Al titanium alloy is studied. The microstructure consists in α nodules embedded in elongated β grains. EBSD performed on the alloy shows no crystallographic texture neither for α nor β phase. Tensile tests along the elongation direction, at a strain rate of 2 x 10-3 s-1 give a yield stress of 830 MPa with 13% ductility. Simulations based on an advanced two-phase polycrystalline elasto-viscoplastic self-consistent (EVPSC) model predict that the β phase first plastifies with a sequential onset of plasticity starting from <110> oriented β grains, then <111> and finally <100> oriented β grains. This leads to a strong load transfer from the β grains to the α nodules whose average behavior remains elastic up to high stresses (~940 MPa). However, additional simulations considering exclusively β grains of specific orientation show that the behavior of α nodules is strongly dependent on the β texture in which they are embedded. Especially, in <001> β grains, which plastify the latest, the model predicts the onset of plasticity in favorably orientated α nodules. Moreover, the orientation spread within the β grains can modify the average plastic behavior of α phase. In future, these results will be compared to data obtained from in-situ High Energy XRD and SEM/EBSD experiments.

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“…Furthermore, Sadeghpour et al [14] modified a model by incorporating fillermatrix interface failure to model graphene/polymer nanocomposites properties. Thus, modeling material properties is inevitable where it could provide valuable information on the underlying physics and the structure property relationships across diverse type of materials classification [15][16][17]. This study aims to evaluate whether the reinforcing effect of layered silicates within PA 11 can be explained using composite theories.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Modeling of Polyamide 11 Nanocomposites Properties using Composite Theories

Halim,

Kennedy,

Salleh

et al. 2023

Archives of Metallurgy and Materials

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MicroMechanical Modeling of PolyaMide 11 nanocoMPosites ProPerties using coMPosite theoriesThe use of organically modified clays as nano-reinforcement in polymer matrices is widely investigated owing to their remarkable reinforcement at low filler loading. in this body of work, the nanocomposites were prepared by melt blending nanoclay with polyamide 11 (PA 11) utilising a twin-screw extruder in order to maximise the dispersion of clay particles within the matrix during compounding. The main aim of the work was to study the reinforcing effect of nanoclay within PA 11 using two micromechanical model namely Halpin-Tsai and mori-Tanaka composite theories. These theories were used to predict the effective tensile modulus of PA 11 nanocomposites and the results were compared to the experimental data. in addition, the Halpin-Tsai model was used to predict the storage modulus and heat distortion temperature (HdT) of PA 11 nanocomposites. it was found that the tensile modulus for nanocomposites with a high clay aspect ratio exhibits up to 10% higher when compared to the nanocomposites with lower clay aspect ratio. Thus, it is believed that the combination of clay aspect ratio and modulus contributes to the super reinforcing effect of nanoclay within the PA 11 matrix.

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Micromechanical Modeling of the Elasto-Viscoplastic Behavior and Incompatibility Stresses of β-Ti Alloys

Cited by 7 publications

References 33 publications

Evolution of Secondary α Phase during Aging Treatment in Novel near β Ti-6Mo-5V-3Al-2Fe Alloy

Evolution of Secondary α Phase during Aging Treatment in Novel near β Ti-6Mo-5V-3Al-2Fe Alloy

Stress partitioning in a near-β Titanium alloy induced by elastic and plastic phase anisotropies: experimental and modeling

Micromechanical Modeling of Polyamide 11 Nanocomposites Properties using Composite Theories

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