Effect of Copper Addition on the Sintering Behavior and Mechanical Properties of Powder Processed Al/Beryl Composites

Autor: N.J. Krishna Prasad, H.B. Niranjan, K. Venkateswarlu, K.R. Suresh
Rok vydání: 2014
Předmět:
Zdroj: Procedia Materials Science. 5:1148-1154
ISSN: 2211-8128
DOI: 10.1016/j.mspro.2014.07.410
Popis: Al-10 wt% beryl metal matrix composites were fabricated using powder metallurgy route. A minor addition of ∼5wt% copper was added to these Al-beryl composites. Sintering was carried out at 600 °C for 2 h in a vacuum sintering furnace. Al-Beryl composites with no copper addition showed little densification, showed yield strength, ultimate tensile strength, BHN, strength co-efficient and strain hardening co-efficient values of 57.07 MPa, 101.64 MPa, 34.38 Hv,163.09 MPa and 0.17 respectively, indicating poor interfacial bonding between beryl particle and Al matrix. The addition of ∼5wt% copper to Al-10wt% Beryl showed improved mechanical properties as compared to without copper added Al- beryl metal matrix composite. The volume fraction of beryl content and sintering temperature of 600C were optimised and selected for this study was based on our earlier experiments. Microstructural studies of Al-Cu-Beryl composites demonstrated that the copper infiltration in Al-beryl reduced the micro voids and responsible for reduced porosity levels. The metallurgical bonding between the Al matrix and beryl particle was substantially improved due to copper additions to Al-beryl metal matrix composites. This composite showed yield strength, ultimate tansile strength, BHN, strength co-efficient and strain hardening co- efficient values are 156.32 MPa, 346.93 MPa, 93.124 Hv,542.69 MPa and 0.13, respectively.
Databáze: OpenAIRE
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