Effect of Equal Channel Angular Pressing (ECAP) on microstructure and properties of Al-FeAlCr intermetallic phase composites

Materials Research

Kátia Regina Cardoso²  Maria A. Muñoz-morris¹  Marcela Lieblich¹  David Morris¹ 

[1] ,Universidade Federal de São Paulo Instituto de Ciência e Tecnologia São José dos Campos SP ,Brazil

关键词: ECAP;    composite;    aluminium;    intermetallic;   

DOI  :  10.1590/S1516-14392014005000029

来源: SciELO

【 摘 要 】

An aluminium matrix composite was prepared by mixing commercial aluminium powders and 15 vol % of FeAlCr powders and consolidation by hot extrusion. The extruded composite was subjected to severe plastic deformation by equal channel angular pressing (ECAP) at room temperature and at 150°C. The extruded composite presents a uniform distribution of particles although some defects are observed such as residual pores and particle agglomerates. The particle distribution does not show a significant change due to ECAP. The extruded composite exhibits a relatively fine grain size of the order of 1-2 μm that was refined to 550 nm after three ECAP passes at room temperature by route A and to 636 nm after four passes at 150°C by route Bc. The yield stress of the composites was increased by 140 to 180% after ECAP as compared with the extruded condition.

【 授权许可】

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