Synthesis of aluminum alloy 7075-graphite composites by milling processes and hot extrusion

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• 作者：R. Deaquino-Lara^a ; ^b ; I. Estrada-Guel^a ; G. Hinojosa-Ruiz^c ; R. Flores-Campos^a ; ^d ; J.M. Herrera-Ram&#xed ; rez^a ; R. Mart&#xed ; nez-Sá ; nchez^a ; ^{roberto.martinez@cimav.edu.mx"" rel=""nofollow}
• 关键词：Aluminum-based composites ; Graphite ; Mechanical properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：509
• 期：Complete
• 页码：S284-S289
• 全文大小：807 K

文摘

Aluminum alloy 7075 (Al₇₀₇₅) and composites of Al₇₀₇₅ with different concentrations of graphite particles (Al₇₀₇₅-G) were synthesized from elemental powders by a milling process. Milled products were consolidated by pressureless-sintering followed by hot extrusion. The mechanical properties of the sintered specimens were evaluated by tension tests and hardness measurements. Variation of Zn and graphite contents and their effect on mechanical properties was characterized. The results obtained show that the yield strength (σ_y), the maximum strength (σ_max) and the Vickers microhardness (μHV) were enhanced as a function of graphite particles content and milling time, but the elongation was reduced significantly in some cases.