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GRAIN-GROWTH BEHAVIOR OF THE AL-CU EUTECTIC ALLOY DURING SUPERPLASTIC DEFORMATION

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Title GRAIN-GROWTH BEHAVIOR OF THE AL-CU EUTECTIC ALLOY DURING SUPERPLASTIC DEFORMATION
 
Creator KASHYAP, BP
 
Subject diffusion
flow
 
Description Grain growth behaviour of the Al-Cu eutectic alloy was investigated as a function of strain (epsilon), strain rate (epsilon) and deformation temperature (T) over epsilon = 10(-5) to 10(-2) s-1 and T = 400 to 540-degrees-C. The grain size increases with increase in strain and temperature. Upon deformation to a fixed strain, the grain growth is generally seen to be more at lower strain rates. The rates of overall grain growth (d-epsilon,t) and due to deformation alone (d-epsilon), however, increase with increasing strain rate according to d-epsilon,t is proportional to epsilon-0.86 and d-epsilon is proportional to-0.64, respectively. The increase in the grain growth rate with strain rate is attributed primarily to the shorter time involved at higher strain rate for reaching a fixed strain. The activation energy for grain growth under superplastic conditions is estimated to be 79 kJ mol-1.
 
Publisher CHAPMAN HALL LTD
 
Date 2011-07-19T15:47:00Z
2011-12-26T12:51:17Z
2011-12-27T05:37:51Z
2011-07-19T15:47:00Z
2011-12-26T12:51:17Z
2011-12-27T05:37:51Z
1991
 
Type Article
 
Identifier JOURNAL OF MATERIALS SCIENCE, 26(17), 4657-4662
0022-2461
http://dx.doi.org/10.1007/BF00612402
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5349
http://hdl.handle.net/10054/5349
 
Language en