High-temperature mechanical properties of aluminium alloys reinforced with titanium diboride (TiB2) particles |
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引用本文: | J.Ooro.High-temperature mechanical properties of aluminium alloys reinforced with titanium diboride (TiB2) particles[J].稀有金属(英文版),2011,30(2):200-205. |
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作者姓名: | J.Ooro |
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作者单位: | Ingeniería y Ciencia de los Materiales;ETSI Industriales;Universidad Politécnica de Madrid;c/José Gutiérrez Abascal;2.28006 Madrid;Spain; |
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摘 要: | The physical and mechanical properties of metal matrix composites were improved by the addition of reinforcements.The mechanical properties of particulate-reinforced metal-matrix composites based on aluminium alloys (6061 and 7015) at high temperatures were studied.Titanium diboride (TiB2) particles were used as the reinforcement.All the composites were produced by hot extrusion.The tensile properties and fracture characteristics of these materials were investigated at room temperature and at high temperatures to determine their ultimate strength and strain to failure.The fracture surface was analysed by scanning electron microscopy.TiB2 particles provide high stability of the aluminium alloys (6061 and 7015) in the fabrication process.An improvement in the mechanical behaviour was achieved by adding TiB2 particles as reinforcement in both the aluminium alloys.Adding TiB2 particles reduces the ductility of the aluminium alloys but does not change the microscopic mode of failure,and the fracture surface exhibits a ductile appearance with dimples formed by coalescence.
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关 键 词: | metal-matrix composites aluminium high-temperature properties titanium diboride |
收稿时间: | 17 July 2009 |
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