Hot isostatic pressing synthesis and mechanical properties of Al/Al–Cu–Fe composite materials

✍ Scribed by El Kabir, T.; Joulain, A.; Gauthier, V.; Dubois, S.; Bonneville, J.; Bertheau, D.

• Book ID: 120383181
• Publisher: Cambridge University Press
• Year: 2008
• Tongue: English
• Weight: 644 KB
• Volume: 23
• Category: Article
• ISSN: 0884-2914
• DOI: 10.1557/JMR.2008.0111

✦ Synopsis

Metal-matrix composites are produced from Al powder and 30 vol% of icosahedral Al–Cu–Fe quasi-crystalline particles using a hot isostatic pressing technique. It is demonstrated that the initial icosahedral phase is transformed into the ω-Al~70~Cu~20~Fe~10~ tetragonal phase during the hot isostatic pressing (HIP) process. The mechanical properties of the composite were evaluated over the temperature range 293 to 773 K by performing compression tests at constant strain rate. The temperature dependence of the yield stress gives evidence of two temperature regimes with a transition temperature at approximately 423 K. Strain-rate sensitivity measurements support the change in rate-controlling deformation mechanisms at this temperature. It is proposed that cross-slip and/or climb mechanism control plastic flow. Finally, it is suggested that the phase transformation of the particle contributes positively to the improvement of the mechanical properties.