Isothermal omega formation and evolution in the Beta-Ti alloy Ti-5Al-5Mo-5V-3Cr

Isothermal omega formation and evolution in the Beta-Ti alloy Ti-5Al-5Mo-5V-3Cr
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Beta-Ti 合金 Ti-5Al-5Mo-5V-3Cr 中等温 omega 的形成和演化

DOI:
10.1080/09500839.2016.1242877
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发表时间:
2016
影响因子:
1.2
通讯作者:
Coakley J
Coakley J
中科院分区:
材料科学4区
文献类型:
--
作者:
Coakley J

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Ti-5Al-5Mo-5V-3CR的等温相是在一次热处理中形成的,原子探针层析确定为富钛/溶质贫析出物。成分和尺寸在时效过程中基本保持不变,但在时效8h后,体积分数增加到9.5%,这与正在进行的从无温到等温的转变过程相一致。/界面因氧气而变得丰富。这可能是重要的,因为氧强烈地稳定了相,并且界面先前被认为是随后形成的成核点。
The isothermal phase of Ti-5Al-5Mo-5V-3Cr wt.% is formed within a heat treatment at and identified by atom probe tomography as Ti-rich/solute lean precipitates. The composition and size remain essentially constant during ageing, although the volume fraction increases to 9.5% after ageing for 8 h. This is consistent with an ongoing transformation process of athermal to isothermal. The/interface becomes enriched with oxygen. This may be of significance as oxygen strongly stabilizes the phase, and the/interface has previously been suggested as the nucleation site for subsequent formation.
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