IDENTIFICATION OF THE CRITICAL PORE SIZES IN SINTERED AND ECAPed ALUMINIUM 6XXX ALLOY

被引：22

作者：

Bidulska, J. ^{[1
]}

Kvackaj, T. ^{[1
]}

Pokorny, I. ^{[1
]}

Bidulsky, R. ^{[1
]}

Grande, M. Actis ^{[2
]}

机构：

[1] Tech Univ Kosice, Fac Met, Dept Met Forming, Kosice, Slovakia

[2] Politecn Torino, Dept Appl Sci & Technol, Alessandria, Italy

来源：

ARCHIVES OF METALLURGY AND MATERIALS | 2013年 / 58卷 / 02期

关键词：

aluminium alloy; ECAP; porosity; critical pore sizes; microstructure; fracture; MICROSTRUCTURE; BEHAVIOR; TEXTURE;

D O I：

10.2478/amm-2013-0002

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

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 400 degrees C for 60 min. Sintering was carried out in a vacuum furnace at 610 degrees C 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.

引用

页码：371 / 375

页数：5

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