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Mechanical Properties of the Welded Joints of the Pressed Aluminum–Magnesium 1565ch Alloy at Low and High Temperatures

Authors
  • Zykov, S. A.1
  • Pavlova, V. I.1
  • Osokin, E. P.1
  • 1 National Research Center Kurchatov Institute—CRISM Prometey, St. Petersburg, 191015, Russia , St. Petersburg (Russia)
Type
Published Article
Journal
Inorganic Materials: Applied Research
Publisher
Pleiades Publishing
Publication Date
Nov 01, 2019
Volume
10
Issue
6
Pages
1448–1455
Identifiers
DOI: 10.1134/S2075113319060315
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractThe paper shows the research results of the structure and mechanical properties of welded joints of the hot-pressed panels and profiles manufactured by JSC Arkonik SMP from aluminum–magnesium 1565ch alloy at the temperature range from –165 to 150°C. It is established that the nature of changes in the properties of welded joints of pressed panels and profiles of 1565ch alloy made by manual argon arc welding with non-consumable electrodes of TIG with filler material СвАМг61 at various test temperatures is similar to changes in the welded joints of rolled sheets. When the test temperature is lowered, low-temperature hardening of the welded joints is observed—at cryogenic temperature (–165°C), 20–30% of strength is gained compared to 20°C. The prolonged aging of welded joints at an elevated temperature (150°C) leads to a decrease in strength by 25–30% compared to 20°C. The strength coefficient of welded joints with reinforced joint is not less than 0.9 of the actual strength of the base metal at all test temperatures.

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