Dresden 2009 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 43: Liquid and Amorphous Metals II
MM 43.7: Vortrag
Donnerstag, 26. März 2009, 17:30–17:45, IFW A
Synthesis and mechanical properties of Al-based alloys prepared by hot extrusion and spark plasma sintering of gas atomized powders — •Kumar Babu Surreddi1, Hoang Viet Nguyen2, Miroslava Sakaliyska1, Fahad Ali1, Sergio Scudino1, Vikas C Srivastava3,4, Volker Uhlenwinkel3, Ji-Soon Kim2, Daniel J Sordelet5, and Jürgen Eckert1,6 — 1IFW Dresden, Institut für Komplexe Materialien, Dresden, Germany — 2Research Center for Machine Parts and Materials Processing, University of Ulsan, Ulsan, Republic of Korea — 3Institut für Werkstofftechnik, Universität Bremen, Bremen, Germany — 4Metal Extraction & Forming Division, National Metallurgical Laboratory, Jamshedpur, India — 5Materials and Engineering Physics Program, Ames Laboratory (USDOE), Iowa State University, Ames, Iowa — 6TU Dresden, Institut für Werkstoffwissenschaft, Dresden, Germany
Bulk nanocrystalline and ultrafine-grained Al-based specimens were prepared by in-situ devitrification and consolidation of gas atomized glassy powders. Consolidation was carried out at different temperatures by hot extrusion as well as by spark plasma sintering (SPS). Both techniques lead to highly dense bulk specimens with a microstructure consisting of an fcc-Al phase together with several intermetallic compounds. The consolidated materials display high compression strength, which depends on the consolidation technique, together with large plastic deformation. These results indicate that the mechanical properties of the samples can be tuned within a wide range of strength and ductility as a function of the consolidation technique and parameters used.