AN INVESTIGATION OF THE MICROSTRUCTURE AND MECHANICAL-BEHAVIOR OF NOVEL NANOCRYSTALLINE AL-FE-V-SI-MM ALLOY RIBBONS

Authors
WANG JQ TSENG MK HAO YY HU ZQ WANG ZG
Citation
Jq. Wang et al., AN INVESTIGATION OF THE MICROSTRUCTURE AND MECHANICAL-BEHAVIOR OF NOVEL NANOCRYSTALLINE AL-FE-V-SI-MM ALLOY RIBBONS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 247(1-2), 1998, pp. 51-57
Citations number
12
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
247
Issue
1-2
Year of publication
1998
Pages
51 - 57
Database
ISI
SICI code
0921-5093(1998)247:1-2<51:AIOTMA>2.0.ZU;2-B
Abstract
New Al-based nanocrystalline alloys containing dispersive nanoscale pa rticles were prepared by adding appropriate amounts of Mm (misch metal ) to Al-Fe-V-Si alloy. The microstructure, phase transformations and m echanical properties were studied in detail. It was found that with in creasing Mm content the size of alpha-Al grains and particles decrease d and alpha-Al-13(Fe,V)(3)Si particles existing in Al-Fe-V-Si alloys w ere replaced by metastable Al(8)Fe(4)Mm or quasicrystalline Al(20)Fe(5 )Mm phase. It was found that the transformation of Al(8)Fe(4)Mm to alp ha-Al-13(Fe,V)(3)Si phase is controlled by volume diffusion near 673 K . In addition, the materials exhibit 1.5-2.5 times higher tensile and fatigue fracture strengths in the nanocrystalline alloys than in Al-Fe -V-Si microcrystalline alloy as well as better thermal stability. (C) 1998 Elsevier Science S.A. All rights reserved.