Tailorable burning behavior of Ti14 alloy by controlling semi-solid forging temperature

Chen, Yongnan, Yang, Wenqing, Zhan, Haifei, Zhang, Fengying, Huo, Yazhou, Zhao, Yongqing, Song, Xuding, & Gu, YuanTong (2016) Tailorable burning behavior of Ti14 alloy by controlling semi-solid forging temperature. Materials, 9(8), Article no. 697.

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Semi-solid processing (SSP) is a popular near-net-shape forming technology for metals, while its application is still limited in titanium alloy mainly due to its low formability. Recent works showed that SSP could effectively enhance the formability and mechanical properties of titanium alloys. The processing parameters such as temperature and forging rate/ratio, are directly correlated with the microstructure, which endow the alloy with different chemical and physical properties. Specifically, as a key structural material for the advanced aero-engine, the burn resistant performance is a crucial requirement for the burn resistant titanium alloy. Thus, this work aims to assess the burning behavior of Ti14, a kind of burn resistant alloy, as forged at different semi-solid forging temperatures. The burning characteristics of the alloy are analyzed by a series of burning tests with different burning durations, velocities, and microstructures of burned sample. The results showed that the burning process is highly dependent on the forging temperature, due to the fact that higher temperatures would result in more Ti2Cu precipitate within grain and along grain boundaries. Such a microstructure hinders the transport of oxygen in the stable burning stage through the formation of a kind of oxygen isolation Cu-enriched layer under the burn product zone. This work suggests that the burning resistance of the alloy can be effectively tuned by controlling the temperature during the semi-solid forging process.

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ID Code: 98506
Item Type: Journal Article
Refereed: Yes
Keywords: Titanium, semi-solid forging, temperature, microstructure, burning behavior
DOI: 10.3390/ma9080697
ISSN: 1996-1944
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Metals and Alloy Materials (091207)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 by the authors; licensee MDPI, Basel, Switzerland
Copyright Statement: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/)
Deposited On: 30 Aug 2016 23:33
Last Modified: 31 Aug 2016 23:40

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