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Acta Metall Sin  2005, Vol. 41 Issue (3): 260-266     DOI:
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Microstructure evolution of Ti-(44-50)Al alloys during directional peritectic solidification
LIU Chang; SU Yanqing; LI Xinzhong; GUO Jingjie; JIA Jun; FU Hengzhi
School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001
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LIU Chang; SU Yanqing; LI Xinzhong; GUO Jingjie; JIA Jun; FU Hengzhi. Microstructure evolution of Ti-(44-50)Al alloys during directional peritectic solidification. Acta Metall Sin, 2005, 41(3): 260-266 .

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Abstract  Using the thermodynamic model of TiAl binary system, part of phase diagram of Ti-(44-50)Al around the peritectic reaction was calculated and the solidus and liquidus of primary phase β and peritectic phase α were determined and the parameters used for interface response function were obtained. The interface temperatures of primary phase β and peritectic phase α were calculated for different growth conditions. According to the criterion of the maximum growth temperature, the phase selection and microstructure evolution of Ti-(44-50)Al were theoretically studied and a microstructure-selection map of TiAl stable state solidification as a function of the melt composition and the G/v ratio was constructed.
Key words:  Ti-Al alloy      peritectic solidification      interface response function (IRF)      
Received:  12 March 2004     
ZTFLH:  TG132.32  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I3/260

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