Identification of the Critical Pore Sizes in Sintered and Ecaped Aluminium 6XXX Alloy

Archives of Metallurgy and Materials

R. Bidulský¹  I. Pokorný¹  T. Kvačkaj¹  J. Bidulská¹  M. Actis Grande² 

[1] Department of Metals Forming, Faculty of Metallurgy, Technical University of Košice, Slovakia;Politecnico Di Torino, Department of Applied Science and Technology, Alessandria, Italy

关键词: Keywords : aluminium alloy;    ECAP;    porosity;    critical pore sizes;    microstructure;    fracture;   

DOI  :  10.2478/amm-2013-0002

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The main aim of this paper is to investigate, by means of comparison of experimental studies and mathematical models, the evolution of porosity as consequence of pressing, sintering and ECAPping an aluminium based powder (6xxx). After applying the compacting pressure, specimens were dewaxed in a ventilated furnace at 400º for 60 min. Sintering was carried out in a vacuum furnace at 610ºC for 30 min. The specimens were then ECAPed for 1 pass. The 2-dimensional quantitative image analysis was carried out by means of SEM and OM for the evaluation of the aforementioned characteristics. Results show the effect of processing parameters on the fracture/microstructure behaviour of the studied aluminium PM alloy. Quantitative image analysis, as well as fractographic interpretation and microstructure identification of weak sites in the studied aluminium PM alloy, provide a reliable and reproducible statistical procedure for the identification of the critical pore sizes.

【 授权许可】

Unknown