| Insights into the gradient-characteristic precipitation behaviors of laves phase induced by Fe/W/Mo addition in Ti42Al5Mn alloy | |
| Tang, Hongjian1,2; Xing, Weiwei1,3; Li, Xiaobing1,3; Chen, Bo1,3; Zhao, Pengxiang1,2; Shu, Lei1,3; Zhang, Mengshu1,3; Ma, Yingche1,3; Liu, Kui1,3 | |
| Corresponding Author | Li, Xiaobing(xbli@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn) |
| 2021 | |
| Source Publication | INTERMETALLICS
 |
| ISSN | 0966-9795 |
| Volume | 128Pages:9 |
| Abstract | 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. |
| Keyword | TiAl-Based intermetallic compounds Laves phase Precipitation Diffusion First-principles calculations DSC |
| Funding Organization | National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province of China ; China postdoctoral science foundation |
| DOI | 10.1016/j.intermet.2020.107022 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51971215] ; Natural Science Foundation of Liaoning Province of China[2019-MS-330] ; China postdoctoral science foundation[2019M661152] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000596079900003 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158750 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, Xiaobing; Liu, Kui |
| Affiliation | 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 |
| Recommended Citation 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. |
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