Consolidation of AA 7075-2 wt% ZrO2 Composite Powders by Severe Plastic Deformation via ECAP

查看全文 作　　者：S. E. Hernandez-[1]Martinez;J. J. Cruz-[1]Rivera;R. Martinez-[2]Sanchez;C. G. Garay-[2]Reyes;J. A. Mufioz-[3]Bolanos;J. M. [3,4]Cabrera;J.L.Hernández-[5]Rivera

机构地区：[1]Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, Sierra Leona 550, 78210 San Luis Potosi, Mexico;[2]Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes 120, 31109 Chihuahua, Mexico;[3]Departamento de Ciencia de Materiales e Ingenieria Metalurgica, Universitat Politecnica de Catalunya, Av Diagonal 647, 08028 Barcelona, Spain;[4]Fundacion CTM Centro Tecnologico, Plaza de la Ciencia 2,08243 Manresa, Spain;[5]CONACYT Research Fellow-Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi-, Sierra Leona 550, 78210 San Luis Potosf, Mexico

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2016年第29卷第10期,共7页

基　　金：supported by Universidad Autónoma de San Luis Potosi, Centro de Investigación en Materiales Avanzados Unidad Chihuahua and Universitat Politècnica de Catalunya;Financial support by CONACYT is appreciated;financial support from FAI-UASLP under the project CI5-FAI-04-45.45 摘　　要：The powders of the AA 7075-ZrO_2 were mixed by mechanical milling, but it was found that the system presents a few disadvantages when processed by conventional sintering and hot extrusion, since intermetallic phases between ZrO_2 particles and alloying elements were formed. Equal channel angular pressing(ECAP) processing was proposed as an alternative method to consolidate the composite where there is no intermetallic formation. The analysis of the ECAP process showed that the intermediate temperature(220 ℃) produced a higher consolidation level than conventional sintering and hot extrusion(400 and 500 ℃, respectively). This fact was supported by relative density analysis. In the case of the sintered and hot-extruded sample, the relative density exhibited a value of 0.95, while ECAP sample showed a value of 0.98. Hardness values show that microstructural refinement obtained during mechanical milling was preserved during ECAP processing even when it was carried out at 220 ℃. 关键词：金属矩阵 composites (MMC ) 粉末巩固严重塑料变丑(SPD )

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Consolidation of AA 7075-2 wt% ZrO2 Composite Powders by Severe Plastic Deformation via ECAP

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