Study on fracture behavior of SiCp/A356 composites 被引量：1

Study on fracture behavior of SiCp/A356 composites

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摘要 The fracture behavior of SiCp/A356 composite at room and high temperatures was studied. Under tensile stress condition at room temperature, the fracture is mostly a combination of the brittle fracture of SiC particles and ductile fracture of A356 matrix. As the tensile temperature increases, the composite changes the main fracture behavior to the separation fracture of the bonding surface between SiC particles and A356 matrix. When the tensile temperature reaches 573 K, the fracture behavior of the composites is almost the whole separation fracture of the bonding surface, which is the main strengthening mechanism at high temperature. Under the cycle stress condition at room and high temperatures, the main fracture behavior of the composites is always a combination of the brittle fracture of SiC particles and ductile fracture of A356 matrix. However, under the cycle stress at high temperature, cycle behavior of the composites changes from cycle hardening at room temperature to the cycle softening at high temperature. The fracture behavior of SiCp/A356 composite at room and high temperatures was studied. Under tensile stress condition at room temperature, the fracture is mostly a combination of the brittle fracture of SiC particles and ductile fracture of A356 matrix. As the tensile temperature increases, the composite changes the main fracture behavior to the separation fracture of the bonding surface between SiC particles and A356 matrix. When the tensile temperature reaches 573 K, the fracture behavior of the composites is almost the whole separation fracture of the bonding surface, which is the main strengthening mechanism at high temperature. Under the cycle stress condition at room and high temperatures, the main fracture behavior of the composites is always a combination of the brittle fracture of SiC particles and ductile fracture of A356 matrix. However, under the cycle stress at high temperature, cycle behavior of the composites changes from cycle hardening at room temperature to the cycle softening at high temperature.

作者 KANG Suk-Bong

机构地区 Department of Materials Engineering

出处《Rare Metals》 SCIE EI CAS CSCD 2006年第z2期168-173,共6页 稀有金属（英文版）

基金 This work was financiallysupportedbythe National High Technology Research and Development Pro-gram of China(863Program)(No.2003AA331190).

关键词 SiCp/A356 COMPOSITES BRITTLE FRACTURE DUCTILE FRACTURE SEPARATION FRACTURE SiCp/A356 composites brittle fracture ductile fracture separation fracture

分类号 TB333 [一般工业技术—材料科学与工程]

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