Properties of the AZ31 Magnesium Alloy Round Bars Obtained in Different Rolling Processes / Własności Prętów Okrągłych Ze Stopu Magnezu AZ31 Otrzymanych W Różnych Procesach Walcowania

• Published in: Archives of metallurgy and materials 2015-12, Vol.60 (4), p.3001-3006
• Main Authors: Stefanik, A., Szota, P., Mróz, S., Bajor, T., Dyja, H.
• Format: Article
• Language: English
• Subjects: Deformation; groove rolling; Grooves; magnesium alloy; Magnesium alloys; Magnesium base alloys; Metal forming; Methods; microstructure; Plant layout; Plastic flow; Rolling mills; Round bars; Skewed distributions; Stretching; Tensile tests; three-high skew rolling mill
• ISSN: 2300-1909; 1733-3490; 2300-1909
• DOI: 10.1515/amm-2015-0479

Currently magnesium alloy bars are manufactured mainly in the extrusion process. This method has some drawbacks, which include: low process capacity, considerable energy demand, small length of finished products. Therefore it is purposeful to develop efficient methods for manufacturing of Mg alloy products in the form of bars, such methods include groove rolling and three-high skew rolling processes. Modified stretching passes provide change in material plastic flow, which contributes to the occurrence of the better distribution of stress and strain state than in the case of rolling in classical stretching passes. One of the modern method of Mg alloy bars production is rolling in a three-high skew rolling mill, which allows to set in a single pass a larger deformation compared to the rolling in the stretching passes. The paper presents the results of experimental studies of the AZ31 round bars production in the modified stretching passes and in the three-high skew rolling mill. The study of microstructural changes, hardness and the static tensile tests were made for as-cast and ready-rolled bars in both analyzed technologies.