Lamellar orientation control of Ti-47Al-0.5W-0.5Si by directional solidification using β seeding technique

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• 作者：Tong Liu ; Liangshun Luo ; ^{luols@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yanqing Su ; ^{suyq@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jingjie Guo ; Hengzhi Fu
• 关键词：Titanium aluminides ; Directional solidification ; Crystal growth ; Lamellar orientation
• 刊名：Intermetallics
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：73
• 期：Complete
• 页码：1-4
• 全文大小：1816 K

文摘

In this paper, we report a β seeding technique for the lamellar orientation controlling in TiAl alloy, which is a novelty and effective method for aligning the lamellar orientation of Ti–47Al–0.5W–0.5Si with primary α phase. The shorter composition transition zone and simpler process procedure can improve the deficiency of α seeding technique. The proper temperature gradient and normal growth rate are necessary for aligning the lamellar orientation in TiAl alloy with primary α phase using β seeding technique.