Influence of Sr and Mn Additions on Intermetallic Compound Morphologies in Al-Si-Cu-Fe Cast Alloys
Year: 2003
Type: article
Abstract: The influence of Sr or Sr and Mn combined additions on the Fe-containing intermetallic compounds in Al-Si-Cu-Fe cast alloys has been investigated using Al-6.5%Si-3.5%Cu-1.0%Fe and Al-6.5%Si-3.5%Cu-1.0%Fe-0.3%Mn alloys (in mass%) with a similar composition to the 319 aluminum alloy. The results show that Sr successfully modifies the large, highly branched β-needle-like phase (β: Al5FeSi) into the individual, less-branched and finer one. The combined addition of Mn and Sr results in modification of the needle-like β-phase as well as promotion of Chinese script and sludge morphology formation. The mechanism of the above morphological changes has been discussed in accordance with the mechanism of nucleation and growth of the β-needle-like phase during solidification.
Source: MATERIALS TRANSACTIONS
Authors: Peyman Ashtari, Hiroyasu Tezuka, Tatsuo Sato
Institution: Tokyo Institute of Technology
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2097828794