Multi-scale numerical analysis of the effect of microstructural features on the mechanical behavior of polycrystalline Ti-6Al-4V alloy

• Autorzy: Benmessaoud Fatna , Velay Vincent , Cheikh Mohammed , Vidal Vanessa , Boher Christine , Rézaï-Aria Farhad

Identyfikatory

DOI

10.24423/EngTrans.1014.20190615

• Języki publikacji: EN

Abstrakty

EN

The present work aims to model the influence of microstructural features of Ti-6Al-4V titanium alloy on its mechanical behavior. A multi-scale approach based on crystal plasticity is considered. The elasto-viscoplastic constitutive equations of Meric-Cailletaud are modified to take into consideration the effect of the grain size by introducing the Hall-Petch relationship at the local scale. This modified model is coupled with finite element calculations under small strain assumption to simulate the monotonic mechanical behavior of Ti-6A-4V at local and global scales. It is shown that the mechanical behavior of Ti-6Al-4V is drastically dependent upon the material features. Strong crystallographic texture can result in the formation of hardened and less hardened areas. Moreover, by increasing the grain size scattering, the heterogeneously deformed areas are multiplied. By decreasing the average grain size, the yield strength increases. It is observed that the effects of grain size, grain size scattering and crystallographic texture are coupled.

Słowa kluczowe

EN

Ti-6Al-4V alloy; crystal plasticity; grain size; crystallographic texture; scattering of grain size; multi-scale modeling

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2019
• Tom: Vol. 67, iss. 2
• Strony: 227--242
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr.

Twórcy

autor

Benmessaoud Fatna

• ICA, Université de Toulouse, CNRS, IMT Mines Albi, INSA, UPS, ISAE-SUPAERO Compus Jarlard, Albi 81000, France

autor

Velay Vincent

• ICA, Université de Toulouse, CNRS, IMT Mines Albi, INSA, UPS, ISAE-SUPAERO Compus Jarlard, Albi 81000, France

autor

Cheikh Mohammed

• ICA, Université de Toulouse, CNRS, IMT Mines Albi, INSA, UPS, ISAE-SUPAERO Compus Jarlard, Albi 81000, France

autor

Vidal Vanessa

• ICA, Université de Toulouse, CNRS, IMT Mines Albi, INSA, UPS, ISAE-SUPAERO Compus Jarlard, Albi 81000, France

autor

Boher Christine

• ICA, Université de Toulouse, CNRS, IMT Mines Albi, INSA, UPS, ISAE-SUPAERO Compus Jarlard, Albi 81000, France

autor

Rézaï-Aria Farhad

• ICA, Université de Toulouse, CNRS, IMT Mines Albi, INSA, UPS, ISAE-SUPAERO Compus Jarlard, Albi 81000, France

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).