Investigation of strain rate sensitivity of Gum Metal under tension using digital image correlation

• Autorzy: Golasiński Karol , Pieczyska Elżbieta , Maj Michał , Staszczak Maria , Świec Paweł , Furuta Tadahiko , Kuramoto Shigeru

Identyfikatory

DOI

10.1007/s43452-020-00055-9

• Języki publikacji: EN

Abstrakty

EN

Mechanical behavior of a multifunctional titanium alloy Gum Metal was investigated by conducting tensile tests at various strain rates and applying digital image correlation (DIC) technique. Stress–strain curves confirmed low Young’s modulus and high strength of the alloy. The determined values of yield strength had a tendency to increase, whereas the elongation to the specimen rupture tended to decrease with increasing strain rate. True stress versus strain curves were analyzed using selected lengths of virtual extensometer (VE) placed in the strain localization area. When the initial length of the VE was the same as the gauge length, work hardening was observed macroscopically at lower strain rates, and a softening was seen at higher strain rates. However, the softening effect was not observed at the shorter VE lengths. Evolution of the Hencky strain and rate of deformation tensor component fields were analyzed for various strain rates at selected stages of Gum Metal load-ing. The DIC analysis demonstrated that for lower strain rates the deformation is macroscopically uniform up to the higher average Hencky strains, whereas for higher strain rates the strain localization occurs at the lower average Hencky strains of the deformation process and takes place in the smaller area. It was also found that for all strain rates applied, the maximal values of Hencky strain immediately before rupture of Gum Metal samples were similar for each of the applied strain rates, and the maximal local values of deformation rate were two orders higher when compared to applied average strain rate values.

Słowa kluczowe

EN

titanium alloy; gum metal; strain rate sensitivity; strain localization; digital image correlation; full-field deformation analysis

PL

stop tytanu; odkształcenie; cyfrowa korelacja obrazu

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 2
• Strony: 339--352
• Opis fizyczny: Bibliogr. 35 poz., fot., wykr.

Twórcy

autor

Golasiński Karol

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

autor

Pieczyska Elżbieta

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

autor

Maj Michał

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

autor

Staszczak Maria

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland

autor

Świec Paweł

• Institute of Materials Science, 75 Pułku Piechoty 1A, 41-500 Chorzow, Poland

autor

Furuta Tadahiko

• Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan

autor

Kuramoto Shigeru

• Department of Mechanical Engineering, College of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi 316-8511, Japan

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)