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THERMAL STABILITY OF Ti-24Al-11Nb-3V-1Mo ALLOY |
ZHANG Bing;WAN Xiaojing;WANG Jianguo;ZHANG Ying Shanghai University of Technology |
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Cite this article:
ZHANG Bing;WAN Xiaojing;WANG Jianguo;ZHANG Ying Shanghai University of Technology. THERMAL STABILITY OF Ti-24Al-11Nb-3V-1Mo ALLOY. Acta Metall Sin, 1993, 29(10): 23-27.
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Abstract The thermal stability of Ti-24Al-11Nb-3V-1Mo alloy was studied after ex-posure at 650--750℃ for different time. The bending strength σ_(bb) and flexibility f decreasedwith increasing exposure temperature and exposure time in air, while only a little change ofσbb and f was noticed when samples exposed under vacuum in the same condition. This is dueto the formation of a brittle oxygen-enriched layer adjacent to the surface of material, inaddtion to the formation of TiO_2 on the surface after exposure in air. Thermal exposure of al-loy results in the change of microstructure, i.e., forming the "O" phase, which is not the ma-jor factor causing the degradation of mechnical properties.
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Received: 18 October 1993
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