Examination of properties of Al-7Mg-(2-4)Zn-0.5Zr alloy specimens processed by direct energy deposition

Wonseok Yang, Bong Hwan Kim, Jin Kyu Lee, Shae K. Kim, Hyunkyu Lim, Do Hyang Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, the microstructures, mechanical and corrosion properties of Al-7Mg-2Zn-0.5Zr and Al-7Mg-4Zn-0.5Zr alloys fabricated by DED process were examined. For the manufacturing of pre-alloys for gas atomization, high amount of Mg was added in the form of Mg-Al2Ca master alloy, while, for the addition of Zr, Al-10Zr mater alloy was used. From the EBSD results, it was found that increasing of Zn amount from 2% to 4% did not change the grain size, nevertheless, it substantially enhanced the tensile strength of alloy, on the expense of a small decrease in elongation. However, when these alloys were subjected to heat-treatment at 400 °C for 4 hours, a considerable amount of increment in tensile strength were observed in 2%Zn-containing alloy, while, strength of the specimen having 4% Zn remained unchanged. This means that the precipitation behaviour of the two alloys was different. It was also found from the results of salt spray test that the corrosion rate increased as the content of Zn were increased.

Original languageEnglish
Title of host publicationEuro PM 2019 Congress and Exhibition
PublisherEuropean Powder Metallurgy Association (EPMA)
ISBN (Electronic)9781899072514
Publication statusPublished - 2019
EventEuropean Powder Metallurgy Congress and Exhibition, Euro PM 2019 - Maastricht, Netherlands
Duration: 2019 Oct 132019 Oct 16

Publication series

NameEuro PM 2019 Congress and Exhibition

Conference

ConferenceEuropean Powder Metallurgy Congress and Exhibition, Euro PM 2019
CountryNetherlands
CityMaastricht
Period19/10/1319/10/16

Bibliographical note

Publisher Copyright:
© European Powder Metallurgy Association (EPMA)

All Science Journal Classification (ASJC) codes

  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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