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Study of Microstructure and Sliding Wear Behaviour of Al (7075) Reinforced with Bottom Ash in Metallic Mould with Water Chill


Author(s):

Mr. Suresh Rathod , SIT TUMKUR; Dr. Umashankar, SIT RUMKUR

Keywords:

Al 7075, Bottom Ash, Stir Casting, water chill, metal mould

Abstract:

The mechanical properties of composite materials are strongly dependent on micro structural parameters of the system. Faster cooling of casting is done by metal mould as well as water circulation uniformly at the end of the casting which carries heat at faster rate and gives finer micro structure and improves mechanical properties. The evaluation of microstructure depends largely on the cooling rate during phase change. Though the microstructure evolution depends on many process parameters, the final structure is decided by the cooling conditions during solidification. The mold material has a decided effect on the structure formation. The use of water chills during casting not only favors directional solidification but also accelerates solidification. In this work an attempt is made to the cooling of Al (7075)-bottom ash composites cast using mild steel mould with water chill. The microstructure and dry sliding wear cast specimens are analyzed and reported. It was observed that the water chill and mild steel mould material has a significant influence on the microstructure and properties of the cast specsimens. Finer structure and better mechanical properties were observed with the specimens cast using water chills, whereas, casting without water chill gave rise to coarse structure with reduced mechanical properties. Composite is produced by stir casting method. It was observed that chill effect has significant improvement in wear properties are noticeable as the wt % of the bottom ash increases as compared to unreinforced matrix.


Other Details:

Manuscript Id :IJSTEV1I5023
Published in :Volume : 1, Issue : 5
Publication Date: 01/12/2014
Page(s): 1-5
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