| 引用本文: | 马国俊,丁雨田,金培鹏,王冬强.团簇对粉末热挤压铝基复合材料力学性能的影响[J].材料科学与工艺,2015,23(4):64-69.DOI:10.11951/j.issn.1005-0299.20150411. |
| MA Guojun,DING Yutian,JIN Peipeng,WANG Dongqiang.Effect of clustering on the mechanical properties of whisker reinforced Al matrix composites by hot extrusion of powder[J].Materials Science and Technology,2015,23(4):64-69.DOI:10.11951/j.issn.1005-0299.20150411. |
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| 摘要: |
| 为明确晶须团簇行为对材料力学性能的影响,采用粉末热挤压法制备了硼酸镁晶须增强铝基复合材料,对不同含量的晶须增强铝基复合材料进行了力学性能测试,并基于载荷传递模式提出相应的模型对材料强度进行预测.结果表明:随着硼酸镁晶须含量的增加,团簇加剧；当晶须体积分数大于10%时,材料力学性能降低；提出的模型考虑了团簇因素,成功预测了复合材料的实验强度. |
| 关键词: 铝基复合材料 硼酸镁晶须 热挤压 团簇 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20150411 |
| 分类号:TB331 |
| 基金项目:国家重点基础研究发展计划项目(2011CB612200). |
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| Effect of clustering on the mechanical properties of whisker reinforced Al matrix composites by hot extrusion of powder |
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MA Guojun1,2, DING Yutian1, JIN Peipeng2, WANG Dongqiang1
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(1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology, Lanzhou 730050, China;2. School of Mechanical Engineering, Qinghai University, Xining 810016, China)
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| Abstract: |
| Mg2B2O5 whisker reinforced Al matrix composites were fabricated using powder metallurgy route, and the effects of clustering on mechanical properties of the composites were investigated. The mechanical properties of composites reinforced with different volume fractions of whiskers were measured, and a model based on the loading transfer mode was proposed to predict the strength of materials. The results showed that the aggregation of whiskers were apparent with increasing whisker content, and the mechanical properties (tensile or yield strength) decreasewhen the content of whisker was higher than 10vol.%. Considering the aggregation effect, the proposed model could well predict the experimentally observed strength of the composites. |
| Key words: Al matrix composites Mg2B2O5 whisker hot extrusion clustering mechanical properties |
