Testing metals in tension and relaxation at elevated temperatures

• Autorzy: Darrieulat M. , Aoufi A. , Desrayaud CH.

Identyfikatory

DOI

10.24423/aom.4276

• Języki publikacji: EN

Abstrakty

EN

This article describes an apparatus for testing viscoplastic metallic alloys in tension at temperatures up to 400ºC. Its distinctive feature is a two-shelled furnace which encompasses the test-piece. The extensometer is attached to the shoulders of the specimen and remains outside the oven, so that it works at room temperature. The strain ε_rs in the reduced section inside the tight fitting oven is calculated with the help of a finite element software from the strain ε_ext given by the extensometer. In the elastic range, the set-up was used for the measurement of Young’s moduli. In the plastic and viscoplastic ranges, it was used to draw work-hardening curves and to perform relaxation tests representative of in-service conditions. In this later case, a method to derive the strain rate sensitivity from the decrease with time of the registered stress is presented. The furnace can be easily machined in a mechanical workshop for all shapes and dimensions of test-pieces, so that it can be adapted to various studies of the workability of metallic alloys, especially those which necessitate a rapid rise and precise maintenance in temperature.

Słowa kluczowe

EN

tension testing; viscoplasticity; work hardening; engineering strain; extensometer; relaxation test; strain rate sensitivity; elevated temperature

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2023
• Tom: Vol. 75, nr 1-2
• Strony: 75--106
• Opis fizyczny: Bibliogr. 27 poz., rys., tab., wykr.

Twórcy

autor

Darrieulat M.

• Mines Saint-Etienne, Université de Lyon, CNRS, UMR 5307 LGF, Centre SMS, F – 42023 Saint-Etienne France

autor

Aoufi A.

• Mines Saint-Etienne, Université de Lyon, CNRS, UMR 5307 LGF, Centre SMS, F – 42023 Saint-Etienne France

autor

Desrayaud CH.

• Mines Saint-Etienne, Université de Lyon, CNRS, UMR 5307 LGF, Centre SMS, F – 42023 Saint-Etienne France

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