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In the presented work the influence of deformation conditions and heat treatmentHeat treatment on the microstructureMicrostructure, mechanical and corrosion propertiesCorrosion properties of extruded profilesProfile from alloy 5081 was studied. The results showed that zirconium and scandiumScandium present in the alloy provide a high level of strengthStrength characteristics in a wide time and temperature range of the heat treatmentHeat treatment process. At the same time, in the annealed state, the yield strengthStrength of extruded profilesProfile from alloy 5081 was at the level of 245 MPa, which is approximately 1.5 times higher than typical values for alloys of the 5083_O type. The strengthStrength propertiesProperties of semi-finished products from alloy 5081 are slightly inferior to alloys of the 2xxx series after solution treatment and natural aging (T4 type condition), but provide an advantage in corrosion resistance. Analysis of the corrosion resistance of alloy 5081 (in accordance with ASTM G66 and ASTM G67) showed that the use of an annealed condition is more preferable, since the corrosion rate in this case was reduced by more than 2 times. The results obtained show that alloying with scandiumScandium not only significantly increases the strengthStrength propertiesProperties, but also makes it possible to use heat treatmentHeat treatment to improve corrosion resistance in a wide temperature range of processingProcessing.

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Effect of Thermomechanical Treatment on the Microstructure and Properties of Extruded Profiles of Alloy 5081 Alloying with Zirconium and Scandium

  • 会议论文

  • 发表日期：

    2026年

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  • A. Alabin,
  • S. Valchuk,
  • A. Krokhin

摘要

In the presented work the influence of deformation conditions and heat treatmentHeat treatment on the microstructureMicrostructure, mechanical and corrosion propertiesCorrosion properties of extruded profilesProfile from alloy 5081 was studied. The results showed that zirconium and scandiumScandium present in the alloy provide a high level of strengthStrength characteristics in a wide time and temperature range of the heat treatmentHeat treatment process. At the same time, in the annealed state, the yield strengthStrength of extruded profilesProfile from alloy 5081 was at the level of 245 MPa, which is approximately 1.5 times higher than typical values for alloys of the 5083_O type. The strengthStrength propertiesProperties of semi-finished products from alloy 5081 are slightly inferior to alloys of the 2xxx series after solution treatment and natural aging (T4 type condition), but provide an advantage in corrosion resistance. Analysis of the corrosion resistance of alloy 5081 (in accordance with ASTM G66 and ASTM G67) showed that the use of an annealed condition is more preferable, since the corrosion rate in this case was reduced by more than 2 times. The results obtained show that alloying with scandiumScandium not only significantly increases the strengthStrength propertiesProperties, but also makes it possible to use heat treatmentHeat treatment to improve corrosion resistance in a wide temperature range of processingProcessing.