ePrints

Abnormal Grain Growth Mechanism in the Twin-Roller Cast Al-Fe-Si Alloy in the Annealing Process

Lookup NU author(s): Dr Haoyu HuangORCiD

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.

Abstract

© 2020 Y. Z. Zhu et al.The twin-roller casting process is a novel technology used to produce aluminium and other alloys. In this study, the Al-Fe-Si alloy was twin-roller cast into a billet with a thickness of 7.0 mm. This was followed by an annealing process at 480°C for 16 hours. Abnormal grains of more than 15 mm in the nominal diameter were found to have formed on the surface of the billet. Scanning electronic microscopy observation, energy diffraction spectrum, microarea X-ray diffraction, and electronic backscattered diffraction analysis were performed to study this abnormal grain growth. The results showed that abnormal grain nucleates in the region of (100) <001> texture formed in the twin-roller casting process. The growth of abnormal grain was governed by the coalescence of the abnormal grain with its surrounding normal grains, with an average orientation angle of 47° between both the types of grains. High-strain-concentrated regions on the surface layer of the billet were induced by the heterogeneously distributed Fe particles formed in the twin-roller casting process. The presence of these regions accelerates the abnormal grain growth in the following annealing process of the billet.

Publication metadata

Author(s): Zhu YZ, Peng H, Huang H, Li JC

Publication type: Article

Publication status: Published

Journal: Advances in Materials Science and Engineering

Year: 2020

Volume: 2020

Online publication date: 15/06/2020

Acceptance date: 20/05/2020

ISSN (print): 1687-8434

ISSN (electronic): 1687-8442

Publisher: Hindawi Limited

URL: https://doi.org/10.1155/2020/1056274

DOI: 10.1155/2020/1056274

Altmetrics

Share