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http://hdl.handle.net/10397/106376
Title: | Achieving exceptional wear resistance in a compositionally complex alloy via tuning the interfacial structure and chemistry | Authors: | Zhu, W Zhao, C Zhang, Y Kwok, CT Luan, J Jiao, Z Ren, F |
Issue Date: | 15-Apr-2020 | Source: | Acta materialia, 15 Apr. 2020, v. 188, p. 697-710 | Abstract: | Titanium alloys have been widely used for medical devices and structural applications. However, conventional titanium alloys often suffer from low resistance to wear, particularly at elevated temperatures. Herein, an equiatomic TiMoNb compositionally complex alloy (CCA) is shown to exhibit wear resistance comparable to alumina at room temperature (RT). Even at 600 °C, the alloy still shows an extremely low wear rate of the order of 10−6 mm3/(N·m). The remarkable wear resistance is achieved via tuning the interfacial structure and chemistry in TiMoNb CCA, including nanostructuring, titanium segregation at the grain boundaries, and the formation of a high density of nanoscale coherent Ti-rich precipitates with cube-on-cube orientation relationship with the ultrafine-grained matrix. The present results provide significant insights into the design of novel alloys for service in harsh environments. | Keywords: | Compositionally complex alloy Interface Titanium alloys Wear |
Publisher: | Elsevier Ltd | Journal: | Acta materialia | ISSN: | 1359-6454 | EISSN: | 1873-2453 | DOI: | 10.1016/j.actamat.2020.02.039 | Rights: | © 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Zhu, W., Zhao, C., Zhang, Y., Kwok, C. T., Luan, J., Jiao, Z., & Ren, F. (2020). Achieving exceptional wear resistance in a compositionally complex alloy via tuning the interfacial structure and chemistry. Acta Materialia, 188, 697-710 is available at https://doi.org/10.1016/j.actamat.2020.02.039. |
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Jiao_Achieving_Exceptional_Wear.pdf | Pre-Published version | 2.91 MB | Adobe PDF | View/Open |
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