Can Young’s Modulus of Metallic Alloys Change with Plastic Deformation?

Roca, A.; Villuendas, A.; Mejı́a, I.; Benito, J.A.; Llorca-Isern, Núria; Llumà, Jordi; Jorba, Jordi

doi:10.4028/www.scientific.net/msf.783-786.2382

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…It can be observed a quick recovery of Young's modulus from the obtained value immediately after plastic deformation, from 59.3 GPa to 66.0 GPa, measured 8 h after cold working; then E recovers up to 67.5-68 GPa and maintains this value in 1 or 2 weeks. Our research group [20] detected changes in Young's modulus obtained immediately after plastic deformation measured during unloading in two steels, UNS G10180 and UNS G10430. This diminution was up to 20%.…”

Section: Annealing Of Aluminium Samplesmentioning

confidence: 99%

Evolution of Young’s Modulus of Cold-Deformed Pure Aluminium in a Tension Test

Isarn

Jorba

Roca

et al. 2018

MSF

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Young’s modulus varies with crystallographic orientation, temperature and alloying, but also with cold working and heat treatment. In this work, the evolution of Young’s modulus in polycrystalline pure aluminium (99.5%) with different cold-working levels determined at room temperature is presented. The deformation process was carried out in a universal tension machine and measurements were performed by ultrasounds. The Young’s modulus diminished from 70 to 65 GPa for 0-5% of deformation (elongation) and then increased with successive cold-working (68 GPa for 8.5% of elongation). These values were obtained 8 hours after plastic deformation was applied. This behaviour is compared with the Young’s modulus determined by extensometry in the same material. In this case, the modulus decreased from 70 to 63 GPa (3.5% of elongation) and then increased until 68 GPa for 10% of elongation. Results obtained on pure iron (Armco) deformed in the same conditions are included for comparative purposes. Values of Young’s modulus measured during the springback process after plastic deformation at different level are also included. Values obtained are between 10-15% lower than those measured 8 hours after plastic deformation.

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Section: Annealing Of Aluminium Samplesmentioning

confidence: 99%

Evolution of Young’s Modulus of Cold-Deformed Pure Aluminium in a Tension Test

Isarn

Jorba

Roca

et al. 2018

MSF

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“…2% degradation of Young´s modulus for aluminium alloys). Villuendas et al [17] and Roca et al [18] studied the effect of plastic deformation on the changes of Young´s modulus of metallic alloys. They reported that, in aluminium alloys, there were no appreciable changes in the E value.…”

Section: Introductionmentioning

confidence: 99%

Numerical Prediction of Forming Car Body Parts with Emphasis on Springback

Mulidrán

Šiser

Slota

et al. 2018

Metals

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Numerical simulation is an important tool which can be used for designing parts and production processes. Springback prediction, with the use of numerical simulation, is essential for the reduction of tool try-outs through the design of the forming tools with die compensation, therefore, increasing the dimensional accuracy of stamped parts and reducing manufacturing costs. In this work, numerical simulation was used for performing the springback analysis of car body stamping made of aluminium alloy AA6451-T4. The finite element analysis (FEM) based software PAM-STAMP 2G was used for performing the forming and springback simulations. These predictions were conducted with various combinations of material models to achieve accurate springback prediction results. Six types of yield functions (Barlat89, Barlat2000, Vegter-Lite, Hill90, Hill48 isotropic, and Hill48 orthotropic) were used in combination with the Voce hardening model. Springback analysis was conducted in three sections of the formed part; the numerical results were compared with the experimental values. It was found that the combinations of Barlat's yield functions and the Voce hardening law were most accurate in terms of springback prediction. Additionally, it was found that the phenomena that were investigated, which are required for the determination of the kinematic hardening model, such as the change of Young's modulus E, the transient behaviour, work-hardening stagnation, and permanent softening, were not observed in the aluminium alloy studied.

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Thermokinetics, Microstructural Evolution, and Material Response

2022

Laser‐Based Additive Manufacturing

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Can Young’s Modulus of Metallic Alloys Change with Plastic Deformation?

Cited by 5 publications

References 16 publications

Evolution of Young’s Modulus of Cold-Deformed Pure Aluminium in a Tension Test

Evolution of Young’s Modulus of Cold-Deformed Pure Aluminium in a Tension Test

Numerical Prediction of Forming Car Body Parts with Emphasis on Springback

Thermokinetics, Microstructural Evolution, and Material Response

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