No.8（2013）5.Strength and ductility properties of sintered magnesium due to addition of elemental powder

Taku Iwaoka, Masayuki Aonuma, Yoshikazu Teranishi, Kazuo Morikawa

  Magnesium alloys are the lightest metallic materials for practical use, and are regarded as environmentally-friendly materials. Powder metallurgy may lead to the creation of new magnesium alloys that are industrially useful. In order to compact and sinter magnesium powders, special consolidation processes must be used. These processes are obviously complex and not cost effective. Thus, a new approach for easy handling is necessary. This study considered magnesium powder metallurgy using aluminum, zinc and tin powders. The magnesium powder mixtures, which consist of these elemental powders, were consolidated by pulsed current pressure. It was found that the strength and ductility properties of magnesium sintered compacts were remarkably higher than that of as-cast AZ91. The high quality compacts are easily obtained in a shorter time than conventional processes such as hot-pressing. Therefore, this process may be offered as a new alloy system for magnesium powder metallurgy.

Keywords
Magnesium, Powder metallurgy, Transverse rupture strength, AZ91 alloy

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