Transformation of the metastable Al$_6$Fe intermetallic phase during homogenization of a binary Al-Fe alloy

Arbeiter, Jože (author), Vončina, Maja (author), Šetina Batič, Barbara (author), Medved, Jože (author)

Within the scope of this research the transformation of the Al$_6$Fe metastable phase was analyzed via Differential Scanning Calorimetry (DSC), optical and Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). A binary Al-Fe1.1 low-impurity alloy was produced with refined raw materials in a controlled environment. With a cooling rate of 35 K/s, solidification of the Al$_6$Fe metastable phase was achieved. The samples were homogenized at 600 °C for 2–24 h. Results of a qualitative analysis of metallographic samples show that the transformation began on grain boundaries, forming an Fe-phase free region, but after 2 h began to take place within the eutectic region. The transformation is mostly complete after 12 h, but after 24 h of homogenization it is fully complete as all samples, except the 24 h homogenized one, contain both the metastable Al$_6$Fe and the stable Al$_{13}$Fe$_4$ phase.

• Language: English
• Keywords: homogenization, aluminum alloys, phase transformation, differential scanning calorimetry
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 9 str.
• Numbering: Vol. 14, iss. 23, art. 7208
• PID: 20.500.12556/RUL-136703
• UDC: 669
• ISSN on article: 1996-1944
• DOI: 10.3390/ma14237208
• COBISS.SI-ID: 86912003
• Publication date in RUL: 17.05.2022

Record is a part of a journal

• Title: Materials
• Shortened title: Materials
• Publisher: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.12.2021

Projects

• Funder: ARRS - Slovenian Research Agency
• Funding programme: Young researchers