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Effect of compaction pressure on the densification, microstructure, and mechanical properties of Ti-1Al-8V-5Fe alloy based on TiH2 and HDH-Ti powders
Zhang, Yanan; Guo, Xing; Chen, Yungui; Li, Qiangguo
2019-07-24
Source PublicationMICRO & NANO LETTERS
Volume14Issue:8Pages:906-910
AbstractThe high-strength of Ti-1Al-8V-5Fe (Ti-185) alloy is due to TiH2 powders produced at different compaction pressures and compared with hydride-dehydride-Ti powders. The objective of this work was to investigate the microstructural evolution and mechanical properties of Ti-185 alloy under different compaction pressures. The dehydrogenation characteristics of TiH2-185 and the oxygen contents of sintered samples were evaluated by thermogravimetric analysis and mass spectrometer (TG-MS) and oxygen/nitrogen (O/N) analysers. The corresponding microstructural evolution and change in mechanical properties were analysed by means of scanning electron microscopy, X-ray diffraction, electro-universal tester, and hardness tester, respectively. Results show that with the increase in compaction pressure, the green and sintered density and densification rates increase, but the volume fraction of alpha-phase decreases. The TiH2-185 samples have higher densification and sintered density, lower oxygen content than Ti-185 samples, which is attributed to its better compressibility and superior self-cleaning ability as well as more water produced. In addition, the sintered TiH2-185 samples exhibit higher yield strength and hardness in comparison with the sintered Ti-185 samples. The enhanced mechanical properties are attributed to its higher density and less soft alpha-phase in the microstructure.
Keywordvanadium alloys hardness titanium powders iron alloys X-ray diffraction sintering crystal microstructure yield strength densification compaction aluminium alloys scanning electron microscopy titanium alloys titanium compounds mass spectroscopic chemical analysis hardness testing compressibility compaction pressure sintered density microstructural evolution mechanical properties densification dehydrogenation characteristics TG-MS O N analysers scanning electron microscopy TiAlVFe-Ti TiAlVFe-TiH2 yield strength self-cleaning ability compressibility alpha-phase volume fraction hardness tester electro-universal tester X-ray diffraction
Indexed BySCI
Language英语
WOS IDWOS:000482156500020
PublisherINST ENGINEERING TECHNOLOGY-IET
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80895
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Yanan,Guo, Xing,Chen, Yungui,et al. Effect of compaction pressure on the densification, microstructure, and mechanical properties of Ti-1Al-8V-5Fe alloy based on TiH2 and HDH-Ti powders[J]. MICRO & NANO LETTERS,2019,14(8):906-910.
APA Zhang, Yanan,Guo, Xing,Chen, Yungui,&Li, Qiangguo.(2019).Effect of compaction pressure on the densification, microstructure, and mechanical properties of Ti-1Al-8V-5Fe alloy based on TiH2 and HDH-Ti powders.MICRO & NANO LETTERS,14(8),906-910.
MLA Zhang, Yanan,et al."Effect of compaction pressure on the densification, microstructure, and mechanical properties of Ti-1Al-8V-5Fe alloy based on TiH2 and HDH-Ti powders".MICRO & NANO LETTERS 14.8(2019):906-910.
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