Mechanical Characterization and Microstructural Analysis of Stir-Cast Aluminum Matrix Composites (LM5/ZrO2)

Aluminum matrix composites (AMCs) are largely used in defense, maritime, and space applications for their excellent properties. LM5 is used where very high resistance to corrosion from seawater or marine atmospheres is required, for equipment used for the manufacture of foodstuffs, cooking utensils,...

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Bibliographic Details
Published inCrystals (Basel) Vol. 13; no. 8; p. 1220
Main Authors Prakash, Jayavelu, Jebarose Juliyana, Sunder, Salunkhe, Sachin, Gawade, Sharad, Nasr, Emad, Kamrani, Ali
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2023
Subjects
Alloys
Aluminum alloys
Aluminum base alloys
Aluminum matrix composites
Building materials
Building materials industry
Ceramics
Chromium steel
Composite materials
Compressive strength
Corrosion resistance
Density
Ductility
Hardness
Heat conductivity
High resistance
Impact strength
impact test
Lubricants & lubrication
Mechanical properties
Microstructural analysis
microstructure
Photomicrographs
Powder metallurgy
Scanning electron microscopy
Scratch resistance
Seawater
Shock resistance
Silicon carbide
Space applications
Spray forming
stir casting
Temperature
Tensile strength
tensile test
Thermal resistance
Thermal shock
zirconia
Zirconium
Zirconium dioxide
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Summary:Aluminum matrix composites (AMCs) are largely used in defense, maritime, and space applications for their excellent properties. LM5 is used where very high resistance to corrosion from seawater or marine atmospheres is required, for equipment used for the manufacture of foodstuffs, cooking utensils, and chemical plants. Zirconia is preferred over other reinforcements as it shows comparatively great refractory properties, high scratch resistance, and thermal shock resistance. Utilizing the stir casting technique, an attempt was made to produce AMCs of LM5 aluminum alloy strengthened with ZrO2. The weight percentage of ZrO2 was changed to 0%, 3%, 6%, and 9%. The specimens were prepared and tested as per ASTM standards to find the density, micro and macro hardness, impact, tensile, and compressive strength. The micrographs and SEM images confirm the uniform distribution of ZrO2 particles in the aluminum matrix. LM5/9%ZrO2 AMC has the highest density value of 2.83 g/cm3 and LM5/3%ZrO2 has the least porosity of 2.55%. LM5/9% ZrO2 has the highest hardness values of 78 VHN and 72 HRE. LM5/6% ZrO2 AMC has the highest tensile strength of 220 MPa, compressive strength of 296 MPa, and toughness of 12 J. LM5/6% ZrO2 AMCs may be used for many structural applications.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst13081220