Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 25    No. 3    March 2015

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Production and characterization of rich husk ash particulate reinforced AA6061 aluminum alloy composites by compocasting
J. ALLWYN KINGSLY GLADSTON1, N. MOHAMED SHERIFF2, I. DINAHARAN3, J. DAVID RAJA SELVAM4

1. Department of Mechanical Engineering, SCAD College of Engineering and Technology,
Cheranmahadevi 627414, Tamil Nadu, India;
2. Department of Mechanical Engineering, PET Engineering College, Vallioor 627117, Tamil Nadu, India;
3. Department of Mechanical Engineering Science, University of Johannesburg,
Auckland Park Kingsway Campus, Johannesburg 2006, South Africa;
4. Centre for Research in Metallurgy (CRM), School of Mechanical Sciences,
Karunya University, Coimbatore 641114, Tamil Nadu, India

Abstract:Rice husk ash (RHA) is a potential particulate reinforcement to produce aluminum matrix composites (AMCs) economically. Compocasting method was applied to produce aluminum alloy AA6061 reinforced with various amounts (0, 2%, 4%, 6% and 8%, mass fraction) of RHA particles. The prepared composites were characterized using X-ray diffraction and scanning electron microscopy. X-ray diffraction patterns of AA6061/RHA AMCs revealed the presence of RHA particles without the formation of any other intermetallic compounds. The scanning electron micrographs showed a homogeneous distribution of RHA particles all over the aluminum matrix. Intragranular distribution of RHA particles was observed. Further, RHA particles were bonded well with the aluminum matrix and a clear interface existed. The reinforcement of RHA particles enhanced the microhardness and ultimate tensile strength (UTS) of the AMCs. The tensile behavior is correlated to the microstructure of the AMCs.

 

Key words: 6061 Al alloy; aluminum matrix composite; compocasting; rice husk ash; microstructure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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