Journal
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
Volume 69, Issue 6, Pages 1289-1295Publisher
SPRINGER INDIA
DOI: 10.1007/s12666-015-0689-3
Keywords
Transition temperature; Martensite; X-ray diffraction studies; Phase precipitation
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Funding
- CSIR, New Delhi
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In the present study, an attempt has been made to study the effect of the proportion of the main alloying constituents in a Cu-Al-Mn alloy, which is a known shape memory material. Four compositions of the alloy with varying ratios of Al:Mn, varying from 1 to 4 [added to copper], were synthesized using the liquid metallurgy route. After appropriate heat treatment to induce shape memory behaviour, they were studied for microstructure, X-ray diffraction, hardness and transformation temperature in an attempt to understand the effect of the varying ratios of the major alloying constituents on the properties mentioned. With an increase in the Al:Mn ratio, increase in grain size as well as cast hardness were observed. On the other hand, an increase in percentage decrease in hardness was observed with increase in Al:Mn ratio. Increase in Al:Mn ratio also favoured formation of martensitic structure with less amount of retained austenite.
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