Initial Evaluation of Advanced Powder Metallurgy Magnesium Alloys for Armor Development

Magnesium Alloys have the potential to be applied in the various fields of applications including biomaterials. Magnesium Alloys are an interesting alloy due to its high strength to density ratio. They have been proposed as a biodegradable implant material due to its friendly effect to human body compared to another alloy. Besides its good biodegradable properties, it has a disadvantage of low hardness and corrosion properties. In order to overcome this, it has been combined with other metals such as Zinc (Zn) or Copper (Cu). To increase mechanical properties, we used Carbon Nanotubes (CNT) as reinforcement. Magnesium-Zinc (Mg-xZn) CNTs composites with several compositions was prepared by using powder metallurgy and sintered in the presence of flowing Argon (Ar) gas in tube furnace. Mg-Zn Alloy with the composition of 4% and 6% of Zn and the variation of CNTs at 0.1%, 0.3 %, and 0.5% was also prepared. Hardness testing by using microvickers showed that CNTs can increase the alloy hardness which the maximum hardness is 53.6 HV. The corrosion rates as low as 175.5 mpy exhibited for the Mg-Alloy with the composition of Mg-4-Zn with 0.1 wt.% of CNTs

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The texture and anisotropy of hot extruded magnesium alloys fabricated via rapid solidification powder metallurgy

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2011.03.066 ◽

2011 ◽

Vol 32 (8-9) ◽

pp. 4590-4597 ◽

Cited By ~ 27

Author(s):

Ayman Elsayed ◽

Junko Umeda ◽

Katsuyoshi Kondoh

Keyword(s):

Powder Metallurgy ◽

Magnesium Alloys ◽

Rapid Solidification

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Properties of boride-added powder metallurgy magnesium alloys

Journal of Physics Conference Series ◽

10.1088/1742-6596/176/1/012045 ◽

2009 ◽

Vol 176 ◽

pp. 012045

Author(s):

Atsushi Tanaka ◽

Syota Yoshimura ◽

Takuya Fujima ◽

Ken-ichi Takagi

Keyword(s):

Powder Metallurgy ◽

Magnesium Alloys

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Mechanical Properties of Magnesium Alloys Produced by Powder Metallurgy Method.

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.43.1350 ◽

1996 ◽

Vol 43 (11) ◽

pp. 1350-1353 ◽

Cited By ~ 15

Author(s):

Hajime Iwasaki ◽

Kisho Yanase ◽

Takasuke Mori ◽

Mamoru Mabuchi ◽

Kenji Higashi

Keyword(s):

Mechanical Properties ◽

Powder Metallurgy ◽

Magnesium Alloys ◽

Powder Metallurgy Method

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Microstructural Evolution and Mechanical Properties of AZ91 and SiCp/AZ91 Magnesium Alloys upon Rapid Solidification/Powder Metallurgy Followed by Hot Extrusion

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.146-147.734 ◽

2010 ◽

Vol 146-147 ◽

pp. 734-737

Author(s):

Hui Yu ◽

Hua Shun Yu ◽

Zhen Ya Zhang ◽

Guang Hui Min ◽

Cheng Chen

Keyword(s):

Mechanical Properties ◽

Powder Metallurgy ◽

Magnesium Alloys ◽

Rapid Solidification ◽

Microstructural Evolution ◽

Hot Extrusion ◽

Interface Debonding ◽

Porosity Level ◽

Az91 Magnesium ◽

Sic Particulates

In this study, AZ91 and SiC particulates reinforced AZ91 (SiCp/AZ91) magnesium alloys were successfully fabricated using rapid solidification/powder metallurgy technique followed by hot extrusion. Microstructural evolution and mechanical properties of the monolithic AZ91 and SiCp/AZ91 magnesium alloys were evaluated. SiC particulates were well distributed with only few agglomerated particles. The porosity level and microhardness increased as SiCp content increased because the increased surface area of SiCp, harder ceramic phases and SiCp acted obstacles to the motion of dislocations. In addition, an increase in particulate reinforcement content was observed to decrease mechanical properties of the composite compared with the unreinforced counterpart due to increasing agglomerating regions and porosity, brittle interface debonding between matrix and SiCp.

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