Influence of Anisotropy on the Viscoplastic Properties of a Hot Rolled Ti6Al4V Titanium Alloy

• Autorzy: Moćko W. , Kostrzewski C. , Brodecki A.

Identyfikatory

DOI

10.24425/118954

• Języki publikacji: EN

Abstrakty

EN

In this work, the influence of strain rate on the anisotropy of the Ti6Al4V titanium alloy has been analyzed. Tensile tests of notched specimens were carried out in three loading orientations (0°, 45°, and 90°) with respect to the rolling direction, using the servo-hydraulic testing machine and Hopkinson bar. Investigation was supported by the digital image correlation analysis of strain distribution on the specimen surface and assessment of the fracture mechanism. The Ti6Al4V titanium alloy reveals a typical strain rate hardening behavior; however, strain rate sensitivity is independent of the loading orientation. Increases of the loading orientation results in material softening, observed as lowered yield stress, whereas plastic strain exponent and modulus remain unaffected. Fracture strain decreases with loading orientation at quasi-static and dynamic loading conditions.

Słowa kluczowe

EN

Hopkinson bar; digital image correlation; titanium alloy; constitutive relation; anisotropy; high strain rate; Hill's potential

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 1
• Strony: 403--411
• Opis fizyczny: Bibliogr. 38 poz., rys., tab., wzory

Twórcy

autor

Moćko W.

• Motor Transport Institute, 80 Jagiellońska Str., 03-301 Warsaw, Poland

autor

Kostrzewski C.

• Motor Transport Institute, 80 Jagiellońska Str., 03-301 Warsaw, Poland

autor

Brodecki A.

• Motor Transport Institute, 80 Jagiellońska Str., 03-301 Warsaw, Poland

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Uwagi

EN

1. This study was supported by the Polish National Centre for Research and Development (GRAF-TECH/NCBR/14/26/2013)

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).