Work

Solidification relationship between the primary–Al grain and α–Al15(Fe,Mn)3Si2 intermetallic phase in the 6082 wrought Al alloy

Year: 2025

Type: article

Abstract: This study investigates the orientation relationship between primary-Al and α–Al15(Fe,Mn)3Si2 in Wrought Al alloy 6082, focusing on two phase structural interactions. Transmission electron microscopy (TEM) was employed to confirm the alignment between the two main phases. The work showed the formation of primary-Al and α–Al15(Fe,Mn)3Si2 intermetallics, where α–Al15(Fe,Mn)3Si2 nucleates around the primary-Al intergranular regions. TEM confirmed specific orientation relationships (111)α-Al // (202)α-Al15(Fe,Mn)3Si2 and (200) α-Al // (22)α-Al15(Fe,Mn)3Si2 under primary-Al zone axis [110]. The study suggests that the solidification process of primary-Al and α–Al15(Fe,Mn)3Si2 follows a coupled growth mechanism, where the formation of primary-Al influences the evolution of α–Al15(Fe,Mn)3Si2 leading to the observed orientation relationships. The proposed mechanism suggests that the growth kinetics and the matching close-packed planes (110) and (113) play a critical role in the orientation dependent growth of the phases.

Source: Results in Materials

DOI: 10.1016/j.rinma.2025.100830

Authors: M.H. Khan, F. Tang, T.I. Khan

Institutions: University of Warwick, Abbottabad University of Science and Technology

Language: English

Topic: Aluminum Alloy Microstructure Properties

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,530

Funders: Higher Education Funding Council for England, High Value Manufacturing Catapult