Need of an Inert Atmosphere for High-Energy Ball Milling of Al Alloys

Özdemir F., Christudasjustus J., Vukkum V. B., Okuyucu H., Gupta R. K.

Journal of Materials Engineering and Performance, vol.32, no.7, pp.3007-3013, 2023 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 7
  • Publication Date: 2023
  • Doi Number: 10.1007/s11665-022-07309-y
  • Journal Name: Journal of Materials Engineering and Performance
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.3007-3013
  • Keywords: aluminium, corrosion, high-energy ball milling, milling atmosphere, nanocrystalline alloy, powder metallurgy
  • Ankara Yıldırım Beyazıt University Affiliated: Yes

Abstract

© 2022, ASM International.This article compares the corrosion behavior and hardness of an Al alloy (AA2024) produced by high-energy ball milling in air and high-purity Ar. The pre-alloyed AA2024 powder was milled in Ar and air atmospheres, and the produced powder was successfully consolidated to investigate the hardness and corrosion performance. Cyclic potentiodynamic polarization tests revealed higher pitting potential for the alloy milled in air. Additionally, milling in air resulted in higher hardness and thermal stability after a 1-h isothermal heat treatment at 400 and 500 °C. Our results demonstrate that a high-purity Ar atmosphere is not a requirement for all applications and milling in the air can lead to excellent properties.