The role of the 蠅 phase on the non-classical precipitation of the 伪 phase in metastable 尾-titanium alloys

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• 作者：Yufeng Zheng^a ; Robert E.A. Williams^a ; John M. Sosa^a ; Yunzhi Wang^a ; Rajarshi Banerjee^b ; Hamish L. Fraser^a ; ^{fraser.3@osu.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Titanium alloys ; Phase transformations ; Nucleation ; HREM
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：15 January 2016
• 年：2016
• 卷：111
• 期：Complete
• 页码：81-84
• 全文大小：1618 K

文摘

The metastable 尾-Ti alloy, Ti-5553, has been heat-treated to permit a determination of the role of the 蠅 phase on non-classical precipitation of the 伪 phase. Thus, samples containing the athermal 蠅 phase have been up-quenched to 600°C. The observations made are consistent with the activation of the non-classical, pseudo-spinodal, nucleation mechanism, with the 蠅 phase playing essentially no direct role. The 伪/尾 interfacial structures have been shown to exhibit significant degrees of coherency compared with those in conventional 伪/尾 alloys, and implications of this on lowering the interfacial energy, and so the activation for nucleation, are discussed.