Mechanical Properties and Microstructures of Highly Fe-Containing Al–Mg–Si Alloys Processed by Severe Plastic Deformation under High Pressure
Yongpeng Tang, Yuto Tomita, Zenji Horita
Abstract
In this study, A6022-based Al–Mg–Si alloys with three additional Fe contents are processed by high-pressure torsion (HPT) and high-pressure sliding (HPS). Both processes yield a similar tensile strength exceeding 400 MPa. Fe intermetallics were finely and homogeneously fragmented to an average size of ∼2 µm by the HPT process. The high tensile strength is attributed to such a fine and homogeneous fragmentation of Fe intermetallics. It is also demonstrated that the finely fragmented Fe intermetallics play an important role to maintain finer grain size even after solution treatment.
Topics & Concepts
Materials scienceIntermetallicSevere plastic deformationUltimate tensile strengthMicrostructureMetallurgyGrain sizeHigh pressureHomogeneousTorsion (gastropod)Composite materialAlloyThermodynamicsMedicinePhysicsSurgeryMicrostructure and mechanical propertiesAluminum Alloys Composites PropertiesSurface Treatment and Residual Stress