Microstructure evolution of nickel aluminum bronze alloy during compression at elevated temperatures
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Publication Details
Author list: Thossatheppitak B., Suranuntchai S., Uthaisangsuk V., Manonukul A., Mungsuntisuk P.
Publisher: Trans Tech Publications
Publication year: 2014
Volume number: 893
Start page: 365
End page: 370
Number of pages: 6
ISBN: 9783038350255
ISSN: 1022-6680
eISSN: 1662-8985
Languages: English-Great Britain (EN-GB)
Abstract
In this work, effects of temperature and strain rate on microstructure development of a Nickel Aluminum Bronze (NAB) alloy during hot compression were investigated. The temperatures between 750°C and 900°C, strain rates between 0.1 s-1 and 10 s-1 and a deformation degree of 60% were considered. Microstructure analyses were performed for the samples after the compression using scanning electron microscopy technique. The results showed that microstructure of as-cast NAB alloy consisted of α, β′ and κ phase. After homogenization β′ phase transformed to the α and kappa; phase. Furthermore, different heating temperatures led to varying initial microstructures before forming and subsequent deformation, forming rates and cooling caused precipitation of various intermetallic phases. The α phase was found in the final microstructures of all forming conditions. At high forming temperatures, some intermetallic κ phases tended to dissolve and precipitated during cooling according to applied strain rate. However, at lower temperatures of 750-850°C, no significant effect of the strain rate on alteration of intermetallic κ phases. © (2014) Trans Tech Publications, Switzerland.
Keywords
Microstructure evolution
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