Influence of manganese content on superplastic deformation of alpha+beta brasses.

• Autorzy: Dutkiewicz J. , Malczewski P. , Faryna M. , Kuśnierz J.
• Języki publikacji: EN

Abstrakty

EN

Brasses containing 1.5-6 wt.% of manganese were quenched from the beta phase range and cold rolled. As a result the beta+beta' structure in all alloys was obtained. Then, samples were annealed at the temperature range 450-650 degrees centigrade leading to the alpha+beta structure and the grain size range of 3-20 micrometres. Tensile tests of all investigated alloys showed good supeplastic properties. The best ductility was observed at temperature 550 degrees centigrade where the value of strain rate sensitivity coefficient m, was close to 0,5 for the alloy with the smallest manganese content. With higher manganese content even higher average values of m were obtained in the strain rates range 10 to the -5 to 10 to the -2 s to the -1. Texture studies using Orientation Imaging Microscopy revealed the presence of a very weak texture within the alpha phase after grain refinement treatment and a development of a brass type texture after superplastic deformation within alpha phase. This indicates the contribution of the crystallographic slip and of the twinning deformation in addition to the grain boundary sliding. Transmission electron microscopy studies revealed presence of a rather low density of dislocations within the alpha phase and frequent deformation twins in the deformed samples.

Słowa kluczowe

EN

manganese content; superplastic deformation; deformation; brass; superplastic properties; texture

PL

mangan; odkształcenie nadplastyczne; odkształcenie; mosiądz; właściwości nadplastyczne; tekstura

• Wydawca: Komitet Nauki o Materiałach PAN
• Czasopismo: Archives of Materials Science
• Rocznik: 2006
• Tom: Vol. 27, nr 2-3
• Strony: 101--110
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Dutkiewicz J.

autor

Malczewski P.

autor

Faryna M.

autor

Kuśnierz J.

• Institute of Metallurgy and Materials Science of the Polish Academy of Sciences, ul. Reymonta 25, 30-059 Kraków, Poland

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