Precipitation Sequences in Beta Metastable Phase of Ti-5553 Alloy During Ageing

摘要：

In near beta titanium alloys,the precipitates morphology,their size and their spatial arrangement are strongly correlated to the precipitation sequences occurring during heat treatments. The present study concerns the precipitation processes during heating and ageing of beta metastable phase in a Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy. We focus on the influence of three parameters: heating rate, ageing temperature and chemical composition of the metastable beta phase. Transformation processes have been studied using continuous High Energy X-Ray Diffraction (HEXRD) and electrical resistivity. Depending on heat treatment paths,metastable phases such as isothermal omega (hexagonal) and/or alpha double prime (orthorhombic) precipitates may form before the transformation into alpha phase. The formation of these metastable phases clearly influences the final microstructure as well as their mechanical properties.

关键词： Ti-5553 alloy precipitation sequences phase transformations microstructure evolution

作者: Amico Settefrati Moukrane Dehmas Guillaume Geandier Beno(i)t Denand Elisabeth Aeby-Gautier Beno(i)t Appolaire Ga(e)l Khelifati Jér(o)me Delfosse

作者单位: IJL SI2M UMR CNRS 7198 Ecole des Mines,Parc de Saurupt,54042 Nancy Cedex,France AIRBUS Operations SA IJL SI2M UMR CNRS 7198 Ecole des Mines,Parc de Saurupt,54042 Nancy Cedex,France LEM Onera/CNRS,29 av. De la Division Leclerc,92322 Chatillon,France AIRBUS Operations SAS,316 route de Bayonne,31060 Toulouse Cedex,France EADS IW,12 rue Pasteur,92150 Suresnes,France

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 468-472

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）