Evolusi mikrostruktur Aloi A333 melalui Proses Logam Separa Pepejal

Translated title of the contribution: Microstructural Evolution of A333 Alloy through Semisolid Metal Process

A. M. Aziz, Mohd. Zaidi Omar, M. S. Salleh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Semi solid metal processing also known as thixoforming is a relatively new processing method compared to the conventional casting and forging processes. Prior to the thixoforming process, the candidate alloy must go through a preparation procedure to transform its normally dendritic structure to a near spheroidal form. This is followed by a re-heating process at a semi solid temperature range (30-50% liquid range) before forming in a mould using a hydraulic pressing machine. Among the mostly used alloy preparation methods were cooling slope casting, mechanical stirring and direct thermal methods. This study focused on the microstructural evolution of A333 (Al-7.5Si-3.1Cu) aluminium alloy from dendritic to a near spheroidal microstructure as a preparation for the later thixoforming process. The cooling slope casting method was selected in this study because the method was known to be effective yet simple to use. The resulting grain size and shape factor of the solid phase were analysed in response to the pouring temperatures and the lengths of the cooling slope plate selected. In addition, the identification of the solidus and liquidus temperatures was carried out using a difference scanning calometry method. The finest grain size and the best shape factor for the α-Al solid phase were obtained at 620°C pouring temperature and 300 mm cooling slope plate length, i.e. at 15.3 μm and 0.54, respectively.

Original languageIndonesian
Pages (from-to)977-987
Number of pages11
JournalSains Malaysiana
Volume45
Issue number6
Publication statusPublished - 1 Jun 2016

Fingerprint

Microstructural evolution
Cooling
Casting
Metals
Grain size and shape
Temperature
Industrial heating
Processing
Forging
Aluminum alloys
Hydraulics
Scanning
Microstructure
Liquids

Keywords

  • Aluminum alloy
  • Cooling slope process
  • Isothermal heat treatment

ASJC Scopus subject areas

  • General

Cite this

Evolusi mikrostruktur Aloi A333 melalui Proses Logam Separa Pepejal. / Aziz, A. M.; Omar, Mohd. Zaidi; Salleh, M. S.

In: Sains Malaysiana, Vol. 45, No. 6, 01.06.2016, p. 977-987.

Research output: Contribution to journalArticle

Aziz, AM, Omar, MZ & Salleh, MS 2016, 'Evolusi mikrostruktur Aloi A333 melalui Proses Logam Separa Pepejal', Sains Malaysiana, vol. 45, no. 6, pp. 977-987.
Aziz, A. M. ; Omar, Mohd. Zaidi ; Salleh, M. S. / Evolusi mikrostruktur Aloi A333 melalui Proses Logam Separa Pepejal. In: Sains Malaysiana. 2016 ; Vol. 45, No. 6. pp. 977-987.
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