Microstructure and Properties of Magnesium Alloy AZ61 After Extrusion with KoBo Method

• Autorzy: Bednarczyk I.

Identyfikatory

DOI

10.24425/amm.2019.129504

• Języki publikacji: EN

Abstrakty

EN

The article presents tests results of metalforming of magnesium alloy AZ61. Materials for tests were ingots sized ϕ 40×90 mm from magnesium alloy marked with symbol AZ61. Before the shaping process the ingots underwent heat treatment. As a result of conduction of the deformation processes there were rods achieved with diameter of 8 mm. There were axisymmetrical compression tests conducted on the samples taken from rods in temperature range from RT to 350ºC in order to determine the plasticity and formability of the alloy AZ61. Static tensile test was conducted in room temperature (RT), in 300ºC and in 350ºC. With the use of light and electron microscopy techniques the changes which occurred in the microstructure of AZ61 alloy in initial condition and after plastic deformation (classic extrusion, KoBo method extrusion) were described. The deformation of alloy AZ61 using the KoBo method contributes to an increase in strength and plastic properties. The effect of superplastic flow was found at a temperature of 350ºC, where a 300% increase in plastic properties – elongation value was obtained. The analysis of the microstructure showed a significant grain size reduction in the microstructure of alloy AZ61 after deformation by the KoBo method and after anaxisymmetric compression test, where grains of an average diameter of d = 13 μm were obtained.

Słowa kluczowe

EN

AZ61 magnesium alloy; KoBo method extrusion; static tensile test; microstructure; plastic deformation

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 3
• Strony: 1125--1130
• Opis fizyczny: Bibliogr. 19 poz., fot., rys., tab.

Twórcy

autor

Bednarczyk I.

• Silesian University of Technology, Faculty of Material Science and Metallurgy, 8 Krasińskiego Str., 40-019 Katowice, Poland

Bibliografia

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Uwagi

EN

1. This work was supported by Polish Ministry for Science and Higher Edu-cation under internal grant BK221/RM0/2018 for Institute of Materials Science, Silesian University of Technology, Poland.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).