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Ultra-fine grain two-phase aluminum alloys produced by friction stir processing

Friction stir processing (FSP) is applied to produce particulate-reinforced aluminum matrix composites with ultrafine grained structure from elemental powder mixtures of Al-Cu, Al-Ti and Al-Si. The microstructures of the composites were characterized by the use of XRD, SEM and TEM. Microhardness, tensile and compressive tests were performed to evaluate the mechanical properties of these composites. The mechanisms of microstructure evolution in FSP and the strengthening mechanisms in these composites are discussed.
In the Al-Si system, the Si particles were broken and uniformly distributed in the stir zone by the application of multiples-pass FSP. The average size of Si particles and Al grains were refined to below ~2

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0122107-155510
Date22 January 2007
CreatorsHsu, Chih-jing
ContributorsSCC Chen, New-Jin Ho, Chih-Ching Huang, Liuwen Chang, w Wu, PW Kao
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageEnglish
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0122107-155510
Rightsnot_available, Copyright information available at source archive

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