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Juliawati Alias
Structural Materials and Degradation, Faculty of Mechanical Engineering, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia
Computer Science & IT Environmental Science

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The Influence of Hot Forming on the Microstructure and Corrosion Behaviour of AZ31B Magnesium Alloys Juliawati Alias; Nurul Shuhada Shuhada Mohamed; Mahadzir Ishak; Xiorong Zhou; George E Thompson
Indonesian Journal of Science and Technology Vol 3, No 2 (2018): IJoST: VOLUME 3, ISSUE 2, September 2018
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v3i2.12758

Abstract

The influence of the hot forming process of AZ31B wrought and twin roll cast (TRC) magnesium alloy sheets on the microstructure and corrosion behaviour have been evaluated. The corrosion behaviour was investigated by hydrogen evolution experiments in chloride-containing solution. Filiform-like corrosion was predominant attack to the AZ31 magnesium alloys, as observed by in-situ corrosion observation. The intermetallic particle existence and grain structure significantly influenced the corrosion rate. The dendritic structure of the as-cast TRC alloy was severely attacked, revealing that the as-cast alloy was highly susceptible to corrosion. The presence of twins in wrought alloy was found to act as a corrosion barrier, while the increase in grain size showed the high corrosion rate of the alloy.
Co-Authors George E Thompson Mahadzir Ishak Nurul Shuhada Shuhada Mohamed Xiorong Zhou