Size Effect on the Tensile Mechanical Behavior of Thin Ti6242S Specimens at 723 K and 823 K

Autor: Cavé, Kevin, Texier, Damien, Fessler, E., Monceau, D., Poquillon, Dominique
Přispěvatelé: Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Safran Aircraft Engines
Rok vydání: 2022
Předmět:
Zdroj: Metallurgical and Materials Transactions A
Metallurgical and Materials Transactions A, 2023, 54, ⟨10.1007/s11661-022-06898-6⟩
ISSN: 1543-1940
1073-5623
Popis: International audience; The mechanical behavior of titanium-based alloy Ti6242S was investigated under uniaxial tensile loading at 723 K (450 °C) and 823 K (550 °C) under air and argon environments. Microtensile specimens ranging from 1 mm to 100 µm in thickness were tested to investigate the influence of the decrease in thickness on mechanical properties. Fractographic analyses were carried out using scanning electron microscopy. At 450 °C and 550 °C, a decrease in yield strength, ultimate tensile strength, and strain-to-failure with decreasing thickness was observed. These drops in the macroscopic tensile properties of the thinnest specimens result from a combination of oxidation, which further impairs the specimens with a high surface-to-volume ratio, and the overall lower number of colonies of α lamellae contained in thinner specimens. Ti6242S exhibited dynamic strain aging at 450 °C, especially in specimens with thickness below 500 µm.
Databáze: OpenAIRE
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