Oxidation kinetics and microstructure of V-(4–5) wt% Cr-(4–5) wt% Ti alloys exposed to air at 300–650°C
Oxidation kinetics and microstructure of V-(4–5) wt% Cr-(4–5) wt% Ti alloys exposed to air at 300–650°C
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V-(4–5) wt% Cr-(4–5) wt% Ti 合金暴露在 300–650°C 空气中的氧化动力学和微观结构
DOI：
10.1016/s0022-3115(97)00008-1
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发表时间：
1997
影响因子：
3.1
通讯作者：
V. Hang
中科院分区：
文献类型：
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作者：
M. Uz;K. Natesan;V. Hang
我们进行了系统的研究，以确定暴露在空气中的时间和温度对V4Cr4Ti和V5Cr5Ti合金的氧化行为和微观结构的影响。所有样品均来自 1 mm 厚的冷轧板，并且每个样品在高温暴露前均在 1050°C 的真空中退火 1 小时。每种合金的不同样品在环境空气中于 500°C 下加热 24 至约 2000 小时，并在热重分析 (TGA) 装置中加热至 300 至 650°C 的温度。确定了描述两种合金的氧化动力学、氧化物类型及其厚度、合金晶粒尺寸以及基体合金中氧扩散深度的模型并进行了比较。结果表明，在300~650°C空气中，两种合金表面形成的氧化层具有保护作用，并且V5Cr5Ti合金比V4Cr4Ti合金的抗氧化性能稍强。
We conducted a systematic study to determine the effects of time and temperature of air exposure on the oxidation behavior and microstructure of V4Cr4Ti and V5Cr5Ti alloys. All samples were from 1 mm thick cold-rolled sheets, and each was annealed in vacuum at 1050°C for 1 h prior to high-temperature exposure. Different samples from each alloy were heated in ambient air at 500°C for times ranging from 24 to ≈2000 h, and in a thermogravimetric analysis (TGA) apparatus at temperatures ranging from 300 to 650°C. Models describing the oxidation kinetics, oxide type and its thickness, alloy grain size, and depth of oxygen diffusion in the substrate alloy were determined for the two alloys and compared. The results showed that the oxide layers that formed on the surfaces of both alloys in air at 300–650°C are protective, and that the V5Cr5Ti alloy is slightly more oxidation-resistant than the V4Cr4Ti alloy.
H.Nakajima：“氧在钒及其合金中的扩散”Phil.Mag.，。
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