Structure and mechanical properties in a powder-processed icosahedral-phase-strengthened aluminum alloy. (October 2016)

• Record Type: Journal Article
• Authors: Watson, Thomas J.; Gordillo, Mauricio A.; Cernatescu, Iuliana; Aindow, Mark
• Is Part Of: Scripta materialia. Volume 123(2016)
• Page Start: 51
• Page End: 54
• Publication Date: 2016-10
• Subjects: Aluminum alloys -- Mechanical properties -- Microstructure -- Powder consolidation -- Quasicrystal; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.05.037
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Nanocomposite powder particles of aluminum with dispersed icosahedral quasicrystals were produced by gas atomization from an Al-Cr-Mn-Co-Zr alloy. Bulk dispersion-strengthened material was obtained from the powder by blind-die compaction and forging. The material exhibited an attractive combination of room temperature mechanical properties with a dynamic elastic modulus of 90.5 GPa, a tensile yield strength of 690 MPa with 6% elongation to failure, and a high cycle fatigue life of 10 9 cycles at 207 MPa applied stress. The material also exhibited significant potential for elevated temperature applications with a modulus of 75 GPa and yield strength of 400 MPa at 300 °C. Graphical abstract: