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何涛.β-CEZ钛合金在固溶时效时ω相与α相的组织演化规律[J].稀有金属材料与工程(英文),2018,47(9):2711~2716.[He Tao.The Microstructure Evolution of ω and α Phase in the Solution Treatment and Ageing Process of β-CEZ Alloy[J].Rare Metal Materials and Engineering,2018,47(9):2711~2716.]
The Microstructure Evolution of ω and α Phase in the Solution Treatment and Ageing Process of β-CEZ Alloy
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Received:January 17, 2018  Revised:February 24, 2018
DOI:
Key words: β-CEZ  Solution and Ageing  ω phase  α phase  Microstructure Evolution
Foundation item:国家国际科技合作专项(2013DFR50090);陕西省重大科技成果转化引导专项项目(2015KTCG01-11)
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He Tao  
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Abstract:
      This article researched the microstructure evolution of ω and α phase in the solution treatment and ageing process of β-CEZ alloy, which is a kind of typical near-β titanium alloy. The results show that ultrafine athermal ω precipitates (about 1~2 nm) were formed in β-CEZ alloy by quenching from above the β transus temperature. Needle-like α precipitates, about 100nm in length, were formed when solution treated β-CEZ alloy samples were aged at 350℃. The scale of ω assisted α increased to about 200nm in length while increasing ageing temperature to 500℃. The scale of α precipitates grown to about 300nm in length and ω disappeared when the ageing temperature increased to 550℃. Long strip shape α were formed at grain boundaries and the scale of intragranular α increased to several microns when the β-CEZ alloy samples were aged above 650℃.