Microstructural evolution and microhardness of a melt-spun Al–6Ni–2Cu–1Si (in wt.%) alloy

✍ Scribed by E. Karaköse; T. Karaaslan; M. Keskin; O. Uzun

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 710 KB
• Volume: 195
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2007.04.115

✦ Synopsis

Al-Ni-Cu-Si alloy with nominal composition of Al-6 wt.% Ni-2 wt.% Cu-1 wt.% Si alloy were rapidly solidified by the using melt spinning technique to examine the influence of the cooling rate/conditions on microstructure and mechanical properties. The microstructures of the rapidly solidified ribbons and Ingot samples were investigated by the optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The XRD analysis indicated that Ingot samples were Al, Al 3 Ni, Al 2 Cu and Si phases. The OM and SEM results show that the microstructure of rapidly solidified ribbons is clearly different from that of the chill-casting alloy and the structures of alloy melt-spun ribbons were completely composed of finely dispersed ␣-Al and intermetallic Al 3 Ni phase. The microhardness values of the melt-spun ribbons were about 3.2 times higher than those of Ingot counterparts.