Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres
Titanium and its alloys are promising structural materials for advanced aircraft engine applications. However, they are susceptible to ignition and combustion because of their active chemical performance, high combustion heat, and poor heat conductivity. In this study, the ignition and flame propaga...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028187 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832595384020500480 |
|---|---|
| author | Congzhen Wang Jianjun Li Yajun Li Guangyu He Jinfeng Huang Cheng Zhang |
| author_facet | Congzhen Wang Jianjun Li Yajun Li Guangyu He Jinfeng Huang Cheng Zhang |
| author_sort | Congzhen Wang |
| collection | DOAJ |
| description | Titanium and its alloys are promising structural materials for advanced aircraft engine applications. However, they are susceptible to ignition and combustion because of their active chemical performance, high combustion heat, and poor heat conductivity. In this study, the ignition and flame propagation behaviors of Ti, TC4 (Ti–6Al–4V), TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si), and TC17 (Ti–5Al–2Sn–2Zr–4Mo–4Cr) alloys were systematically investigated and compared using promoted ignition-combustion tests in oxygen-enriched environments. The results show that the ignition phenomenon of the four titanium alloys all involve a sharp increase in temperature, explosive melting, and visible light. Nevertheless, the ignition temperature, maximum temperature and molten pool temperature follow the order as TC17>TC11>TC4>Ti. The critical pressures of the four alloys increases with increasing sample size and decreasing oxygen concentration, whereas ignition temperature of the four alloys decreases with increasing oxygen pressure. The activation energy for ignition of the four alloys are determined, and the difference in the activation energy for ignition among the four alloys is very slight. Assessment of the relevant burning kinetics reveal that the burning velocity for the four alloys increases with increasing oxygen pressure. The activation energy for combustion of Ti, TC4, TC11, and TC17 alloys are determined to be 131.20 kJ mol−1, 136.57 kJ mol−1, 150.56 kJ mol−1, and 100.19 kJ mol−1 respectively by fitting the relationship between oxygen pressure and molten pool temperature. Furthermore, the effects of alloy elements on ignition critical conditions, and the burning kinetics controlled by the melting point of solid-liquid interface and activation energy for combustion are discussed. |
| format | Article |
| id | doaj-art-313447b753d04412ac8718b4a6af5963 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-313447b753d04412ac8718b4a6af59632025-01-19T06:25:07ZengElsevierJournal of Materials Research and Technology2238-78542025-01-01343547Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheresCongzhen Wang0Jianjun Li1Yajun Li2Guangyu He3Jinfeng Huang4Cheng Zhang5State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaNational Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an, 710049, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Titanium and its alloys are promising structural materials for advanced aircraft engine applications. However, they are susceptible to ignition and combustion because of their active chemical performance, high combustion heat, and poor heat conductivity. In this study, the ignition and flame propagation behaviors of Ti, TC4 (Ti–6Al–4V), TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si), and TC17 (Ti–5Al–2Sn–2Zr–4Mo–4Cr) alloys were systematically investigated and compared using promoted ignition-combustion tests in oxygen-enriched environments. The results show that the ignition phenomenon of the four titanium alloys all involve a sharp increase in temperature, explosive melting, and visible light. Nevertheless, the ignition temperature, maximum temperature and molten pool temperature follow the order as TC17>TC11>TC4>Ti. The critical pressures of the four alloys increases with increasing sample size and decreasing oxygen concentration, whereas ignition temperature of the four alloys decreases with increasing oxygen pressure. The activation energy for ignition of the four alloys are determined, and the difference in the activation energy for ignition among the four alloys is very slight. Assessment of the relevant burning kinetics reveal that the burning velocity for the four alloys increases with increasing oxygen pressure. The activation energy for combustion of Ti, TC4, TC11, and TC17 alloys are determined to be 131.20 kJ mol−1, 136.57 kJ mol−1, 150.56 kJ mol−1, and 100.19 kJ mol−1 respectively by fitting the relationship between oxygen pressure and molten pool temperature. Furthermore, the effects of alloy elements on ignition critical conditions, and the burning kinetics controlled by the melting point of solid-liquid interface and activation energy for combustion are discussed.http://www.sciencedirect.com/science/article/pii/S2238785424028187Titanium alloysIgnition behaviorCritical ignition conditionBurning velocityAlloying element |
| spellingShingle | Congzhen Wang Jianjun Li Yajun Li Guangyu He Jinfeng Huang Cheng Zhang Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres Journal of Materials Research and Technology Titanium alloys Ignition behavior Critical ignition condition Burning velocity Alloying element |
| title | Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres |
| title_full | Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres |
| title_fullStr | Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres |
| title_full_unstemmed | Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres |
| title_short | Ignition and flame propagation behaviors of titanium alloys in oxygen-enriched atmospheres |
| title_sort | ignition and flame propagation behaviors of titanium alloys in oxygen enriched atmospheres |
| topic | Titanium alloys Ignition behavior Critical ignition condition Burning velocity Alloying element |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028187 |
| work_keys_str_mv | AT congzhenwang ignitionandflamepropagationbehaviorsoftitaniumalloysinoxygenenrichedatmospheres AT jianjunli ignitionandflamepropagationbehaviorsoftitaniumalloysinoxygenenrichedatmospheres AT yajunli ignitionandflamepropagationbehaviorsoftitaniumalloysinoxygenenrichedatmospheres AT guangyuhe ignitionandflamepropagationbehaviorsoftitaniumalloysinoxygenenrichedatmospheres AT jinfenghuang ignitionandflamepropagationbehaviorsoftitaniumalloysinoxygenenrichedatmospheres AT chengzhang ignitionandflamepropagationbehaviorsoftitaniumalloysinoxygenenrichedatmospheres |