Effect of clustering on the mechanical properties of SiC particulate-reinforced aluminum alloy 2024 metal matrix composites
Effect of clustering on the mechanical properties of SiC particulate-reinforced aluminum alloy 2024 metal matrix composites
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DOI：
10.1016/s0921-5093(02)00593-2
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发表时间：
2003-04-25
期刊：
影响因子：
6.4
通讯作者：
Chun, BS
中科院分区：
文献类型：
--
作者：
Hong, SJ;Kim, HM;Chun, BS
采用离心雾化法制备了Al 2024-SiC金属基复合材料（MMC）粉末，研究了聚类对其力学性能的影响。用不同体积分数的碳化硅增强试样进行断裂韧性和拉伸试验。提出了考虑聚类程度的负荷传递模型方法对mmc强度进行估计的模型。该模型成功地预测了Al 2024-SiC复合材料的强度和断裂韧性。在实验观察的基础上，提出颗粒增强MMCs的强度可以由以下关系计算：sigma(y) = sigma(m)V(m) + sigma(r) (V-r - V-c) - sigma(r)V(c)，其中sigma和V分别代表屈服强度和体积分数，下标m、r和c分别代表基体、增强和簇。(C) 2002 Elsevier Science B.V.版权所有
Al 2024-SiC metal matrix composite (MMC) powders produced by centrifugal atomization were hot extruded to investigate the effect of clustering on their mechanical properties. Fracture toughness and tension tests were conducted on specimens reinforced with different volume fractions of SiC. A model was proposed to suggest that the strength of the MMCs could be estimated from the load transfer model approach that takes into consideration the extent of clustering. This model has been successful in predicting the experimentally observed strength and fracture toughness values of the Al 2024-SiC MMCs. On the basis of experimental observations, it is suggested that the strength of particulate-reinforced MMCs may be calculated from the relation: sigma(y) = sigma(m)V(m) + sigma(r) (V-r - V-c) - sigma(r)V(c), where sigma and V represent the yield strength and volume fraction, respectively, and the subscripts m, r, and c represent the matrix, reinforcement, and clusters, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.