|About this Abstract
||Materials Science & Technology 2019
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Development of Magnesium and Magnesium Alloy Materials through Press and Sinter Powder Processing
||Steven C. Johnson, Jason Alvarez
|On-Site Speaker (Planned)
||Steven C. Johnson
Magnesium alloys are highly desirable for structural applications due to their low density and high stiffness to weight ratio. Unfortunately, Mg alloys are also challenging in solid state near shape processing due to limited room temperature ductility and a high affinity for oxygen. In this work, gas atomized prealloyed AZ91D and pure Mg powders were consolidated using room temperature closed die compaction followed by controlled atmosphere sinter densification; i.e. press and sinter processing. Starting powders were characterized for morphology, size distribution, hardness, and phase constituents. Powders were consolidated by compaction stresses up to 600 MPa using both die wall and add mixed lubricants. Sintering was performed in inert and semi-inert atmospheres with sintering temperatures determined by thermal analysis. The consolidated materials were characterized for density, microstructure, phase development, and hardness. The results of this work are intended to advance near shape processing of Mg alloy powders for potential structural applications.