NDLI: Bulk Al–Al$_{3}$Zr composite prepared by mechanical alloying and hot extrusion for high-temperature applications

Content Provider	Springer Nature Link
Author	Pourkhorshid, E. Enayati, M. H. Sabooni, S. Karimzadeh, F. Paydar, M. H.
Copyright Year	2017
Abstract	Bulk Al/Al$_{3}$Zr composite was prepared by a combination of mechanical alloying (MA) and hot extrusion processes. Elemental Al and Zr powders were milled for up to 10 h and heat treated at 600°C for 1 h to form stable Al$_{3}$Zr. The prepared Al$_{3}$Zr powder was then mixed with the pure Al powder to produce an Al–Al$_{3}$Zr composite. The composite powder was finally consolidated by hot extrusion at 550°C. The mechanical properties of consolidated samples were evaluated by hardness and tension tests at room and elevated temperatures. The results show that annealing of the 10-h-milled powder at 600°C for 1 h led to the formation of a stable Al$_{3}$Zr phase. Differential scanning calorimetry (DSC) results confirmed that the formation of Al$_{3}$Zr began with the nucleation of a metastable phase, which subsequently transformed to the stable tetragonal Al$_{3}$Zr structure. The tension yield strength of the Al−10wt%Al$_{3}$Zr composite was determined to be 103 MPa, which is approximately twice that for pure Al (53 MPa). The yield stress of the Al/Al$_{3}$Zr composite at 300°C is just 10% lower than that at room temperature, which demonstrates the strong potential for the prepared composite to be used in high-temperature structural applications.
Starting Page	937
Ending Page	942
Page Count	6
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	24
Issue Number	8
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2017-07-29
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	aluminum matrix nanocomposites mechanical alloying hot extrusion aluminides powder metallurgy Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Materials Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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