Creep Resistance depending on Particle Reinforcement Size of Al-Alloys produced by Powder Metallurgy
| Autor: | Bauer, B., Guillermo Requena, Lieblich, M. |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Scopus-Elsevier |
| Popis: | The Young’s Modulus, the high temperature strength and the tensile creep behaviour are investigated for unreinforced and particle reinforced AA2124 and AA6061 matrices with 25vol% of SiC particles with different sizes. The materials were produced via powder metallurgy and subsequent extrusion. The blending of the metallic powders and the SiC particles was carried out by wet blending (WB) and ball milling (BM). The SiC particles size in WB samples seems less affected by the blending operation, but the bigger particles are affected by the extrusion process. The BM process fractures the SiC particles leading to sub-µm SiC particles and a significant amount of oxide dispersoids is incorporated. The Young’s Modulus is increased by about 50% compared to the unreinforced alloys due to the introduction of the stiffer SiC particles regardless of the initial particle size. All BM samples and only SiC particles The authors would like to thank the Austrian Science Fund (FWF) and the Austrian Agency for International Cooperation in Education and Research (ÖAD) – Acciones Integradas for financial support of this work. The University Service for Transmission Elektron Microscopy (USTEM) is acknowledged for the provision of SEM and TEM facilities. ESK - SIC GmbH is acknowledged for the provision of the SiC powders. The authors are also grateful to H.P. Degischer for supporting the work by fruitful discussions and by assisting in the redaction of the manuscript. |
| Databáze: | OpenAIRE |
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