Investigation of the surface quality of sheets made of alloys of the Al–Cu–Mg system

Selivanov A.A., Tkachenko E.A., Babanov V.V., Astashkin A.I.
UDC
66.017
DOI
10.18577/2307-6046-2022-0-8-14-30
Article PDF (Russian) (2.56 MB)
How to cite
Selivanov A.A., Tkachenko E.A., Babanov V.V., Astashkin A.I. Investigation of the surface quality of sheets made of alloys of the Al–Cu–Mg system // Proceedings of VIAM. 2022. No. 8. DOI: 10.18577/2307-6046-2022-0-8-14-30. URL: https://test.viam.ru/en/journal/2022/8/2
Keywords
surface defects of sheets, bubbles, hydrogen content, gas porosity, mechanical
Abstract

The article presents the results of a study of the surface quality of cladding sheets made of alloys of the D16ch type. Methods of metallographic and fractographic analyzes have shown that the appearance of bubbles in the investigated sheets is caused by the presence of internal interfaces (in the form of pores in the base of sheets and cladding), as well as defective areas of poor-quality welding of the cladding and production and heat treatment of sheets, diffuses hydrogen dissolved in the metal or formed on the surface of the sheets during the reaction of aluminum with water vapor. A tendency towards a decrease in the relative elongation in sheets with surface bubbles compared to sheets without defects was revealed.

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