Investigation of aluminum-based nanocomposites with ultra-high strength
Investigation of aluminum-based nanocomposites with ultra-high strength
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DOI：
10.1016/j.msea.2009.07.067
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发表时间：
2009-12
期刊：
影响因子：
6.4
通讯作者：
Ying Li;Yonghao Zhao;V. Ortalan;Wei Liu;Zhihui Zhang;R. Vogt;N. Browning;E. Lavernia;J. Schoenu
中科院分区：
文献类型：
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作者：
Ying Li;Yonghao Zhao;V. Ortalan;Wei Liu;Zhihui Zhang;R. Vogt;N. Browning;E. Lavernia;J. Schoenu
之前，我们报道了本体铝基金属基质纳米复合材料的超高压缩强度（高达1065 MPa）[J. Ye，B.Q.汉，Z.李，B。Ahn，S.R.纳特，J.M.舍农海峡Mater. 53（2005）481-486]。与传统材料相比，这种显著的强度增加的机制（1225 MPa，H.张文伟Chen，K.T.拉梅什、J. Ye、JM Schoenung，E.S.C.阿成脱线Sci.工程师A：结构材料。Prop. Microstruct.过程433（2006）70-82）和甚至超过其它等效纳米晶材料（10470 MPa，R.G.沃格特，Z. Zhang，T.D. Topping，E.J. Lavernia，J.M. Schoenung，J. Mater.过程技术人员：209（2009）5046-5053）尚未详细研究。该材料由在基体中具有粗晶和超细晶Al 5083的碳化硼增强体组成;加工引入了第二相弥散体和位错。在这项工作中，我们系统地研究微观结构的起源和强化机制，包括霍尔-佩奇，Orowan和泰勒，适当的每一个相成分。为了深入了解这些机制的相对贡献，我们使用混合物规则，修改的剪切滞后模型和Mori-Tanaka方法计算整体强度。
Previously, we reported ultra-high compressive strength (up to 1065MPa) for a bulk aluminum-based metal matrix nanocomposite [J. Ye, B.Q. Han, Z. Lee, B. Ahn, S.R. Nutt, J.M. Schoenung, Scr. Mater. 53 (2005) 481–486]. The mechanisms that are responsible for this significant strength increase over conventional materials (∼225MPa, H. Zhang, M.W. Chen, K.T. Ramesh, J. Ye, J.M. Schoenung, E.S.C. Chin, Mater. Sci. Eng. A: Struct. Mater. Prop. Microstruct. Process. 433 (2006) 70–82) and even over other equivalent nanocrystalline materials (∼470MPa, R.G. Vogt, Z. Zhang, T.D. Topping, E.J. Lavernia, J.M. Schoenung, J. Mater. Process. Technol., 209 (2009) 5046–5053) have not been studied in detail. The material consists of boron carbide reinforcement in a matrix with both coarse-grained and ultrafine-grained Al 5083; the processing introduces secondary phase dispersoids and dislocations. In this work, we systematically investigate the microstructural origins and the strengthening mechanisms, including Hall–Petch, Orowan and Taylor, as appropriate to each phase constituent. To provide insight into the relative contributions of these mechanisms, we calculate overall strength using rule-of-mixtures, modified shear-lag model, and Mori–Tanaka method.