The influence of the temperature of plastic deformation on the structure and mechanical properties of copper alloys CuCo2Be and CuCo1Ni1Be

• Autorzy: Ozgowicz W. , Grzegorczyk B.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the paper is to determine the influence of temperature of plastic deformation on the structure and mechanical properties of copper alloy of the CuCo2Be and CuCo1Ni1Be during a tensile test applied on electrodes to welders. Design/methodology/approach: The tensile test of the investigated copper alloys was realized in the temperature range of 20-800°C with a strain rate of 1.2⋅10-3s-1 on the universal testing machine. Metallographic observations of the structure were carried out on a light microscope and the fractographic investigation of fracture on an electron scanning microscope. Findings: The mechanical properties of alloys as well as the range of occurrence of the Portevin - Le Chatelier (PLC) phenomenon was determined on the basis of F-ΔL curves formed by tensile tests; however the character of fracture during the break of the samples was defined on the basis of fractographic investigations. Research limitations/implications: Practical implications: In result of tensile tests of copper alloys it has been found that the PLC effect occurs in both alloys in the temperature range of 150-350°C. However, the ductility minimum temperature of the alloys equals about 500°C. At the temperature of stretching of about 450°C the investigated copper alloys show maximum strength values. Originality/value: The type of "teething" on the load - displacement curves was defined, according to the classification received in literature. The dependence εkr = f(t) was marked too.

Słowa kluczowe

EN

metallic alloys; copper alloy; plastic instability; Portevin-Le Chatelier effect; PLC effect; tensile test; elevated temperature

PL

stopy metaliczne; stopy miedzi; niestabilność deformacji plastycznej; test rozciągania; podwyższona temperatura; efekt Portevina-Le Chateliera; efekt PLC

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2009
• Tom: Vol. 39, nr 1
• Strony: 5--12
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Ozgowicz W.

autor

Grzegorczyk B.

• Division of Constructional and Special Materials, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

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