Microstructure and Mechanical Properties of a Multi-Modal Al Alloy with High Strength

Abstract:

Nanocrystalline (NC) Al alloy powder was fabricated by milling 2024 Al alloy powder and Fe-based metallic glass (FMG) particles. The NC Al alloy powder was consolidated into bulk sample by adding a part of atomized coarse-grained (CG) 2024 alloy powder. The microstructure and mechanical properties of powder and consolidated bulk materials were examined by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and mechanical test. It revealed that the FMG particles were uniformly distributed in the NC aluminum alloy powder. In the consolidation process, the grain size increased, and Al2CuMg phase precipitated. The multi-modal Al alloy by consolidation of FMG particles, NC and CG powder, exhibited higher yield strength up to 517 MPa and better plasticity in comparison to the samples without CG powder.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 286-292
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.286
• Online since: February 2013
• Authors: Xiao Ning Hao, Rui Xiao Zheng, Li Rong Hao, Han Yang, Chao Li Ma
• Keywords: Al Alloy, High Energy Ball Milling, Multi-Modal, Nanocrystalline

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