Insights into the gradient-characteristic precipitation behaviors of laves phase induced by Fe/W/Mo addition in Ti42Al5Mn alloy

doi:10.1016/j.intermet.2020.107022

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	Insights into the gradient-characteristic precipitation behaviors of laves phase induced by Fe/W/Mo addition in Ti42Al5Mn alloy
	Tang, Hongjian 1,2; Xing, Weiwei 1,3; Li, Xiaobing 1,3; Chen, Bo 1,3; Zhao, Pengxiang 1,2; Shu, Lei 1,3; Zhang, Mengshu 1,3; Ma, Yingche 1,3; Liu, Kui 1,3
刊名	INTERMETALLICS
	2021
卷号	128 页码:9
关键词	TiAl-Based intermetallic compounds Laves phase Precipitation Diffusion First-principles calculations DSC
ISSN号	0966-9795
DOI	10.1016/j.intermet.2020.107022
通讯作者	Li, Xiaobing(xbli@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn)
英文摘要	At service temperature ordered beta phase (beta(o)), a (meta)stable phase in novel beta-solidifying gamma-TiAl alloy, is believed undergoing an unexpected phase-transformation procedure, which strongly depends on the prevailing composition. In this study the impacts of alloying with Fe, W and Mo on the precipitation behaviors of Laves phase from the beta(o) region and the concomitant elemental redistribution during isothermal annealing of a Mn-containing beta-solidifying gamma-TiAl alloy were systematically investigated. Electron microscopy analysis provides evidence that the formation of Laves phase is facilitated by Fe but retarded to a certain extent by W. In sharp contrast, alloying with Mo is confirmed to be capable of effectively suppressing the precipitation of Laves phase due to the intensive restraint of beta(o)->alpha(2) transformation. Moreover, effects of alloying elements on phase stability are carefully evaluated by theoretical calculations, revealing a thermodynamic destabilization of the Laves phase in the presence of W or Mo, whereas Laves phase is stabilized energetically by Fe, which shows good agreement with the experimental results. Additionally, a classical DSC evaluation is supplemented to support a better understanding of the heat events and precipitation kinetics regarding the formation of Laves phase.
资助项目	National Natural Science Foundation of China[51971215] ; Natural Science Foundation of Liaoning Province of China[2019-MS-330] ; China postdoctoral science foundation[2019M661152]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000596079900003
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province of China ; China postdoctoral science foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/158749]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Xiaobing; Liu, Kui
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.IMR NMSA, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110014, Peoples R China
推荐引用方式 GB/T 7714	Tang, Hongjian,Xing, Weiwei,Li, Xiaobing,et al. Insights into the gradient-characteristic precipitation behaviors of laves phase induced by Fe/W/Mo addition in Ti42Al5Mn alloy[J]. INTERMETALLICS,2021,128:9.
APA	Tang, Hongjian.,Xing, Weiwei.,Li, Xiaobing.,Chen, Bo.,Zhao, Pengxiang.,...&Liu, Kui.(2021).Insights into the gradient-characteristic precipitation behaviors of laves phase induced by Fe/W/Mo addition in Ti42Al5Mn alloy.INTERMETALLICS,128,9.
MLA	Tang, Hongjian,et al."Insights into the gradient-characteristic precipitation behaviors of laves phase induced by Fe/W/Mo addition in Ti42Al5Mn alloy".INTERMETALLICS 128(2021):9.