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Cr含量对Ti5Mo5V3Al-xCr系合金组织及性能的影响
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-08-18
对Ti5Mo5V3Al-xCr(x=1.0, 3.0, 5.0, 7.0, 9.0)系五种合金分别在β单相区和(α+β)两相区固溶水淬处理后,并在同一温度时效后的力学性能进行了研究。
Cr含量对Ti5Mo5V3Al-xCr系合金组织及性能的影响Effects of Cr Content on Microstructure and Mechanical
Properties of Ti5Mo5V3Al-xCr Alloys
对Ti5Mo5V3Al-xCr(x=1.0, 3.0, 5.0, 7.0,
9.0)系五种合金分别在β单相区和(α+β)两相区固溶水淬处理后,并在同一温度时效后的力学性能进行了研究。结果显示,合金的时效强度随着Cr含量的增加而逐渐降低。通过扫描电镜SEM及XRD等分析测试手段,详细分析了五种合金在各种热处理状态下的相构成、相含量、尺寸形貌等微观因素与宏观力学性能之间的相关性。结果显示Ti5Mo5V3Al-xCr系合金的强化机制主要是由于时效过程中析出的αs相造成的。合金强化效应的大小则与αs相析出的数量、尺寸密切相关,而αs相的析出机制主要由Cr元素在合金系中的含量所决定。
Different Cr contents of Ti5Mo5V3Al-xCr (x = 1.0, 3.0, 5.0,
7.0, 9.0) alloys were solution treated in β phase region (above the phase
transition point 20℃) and α+β phase region (below the phase transition point
30℃). And then aging at the same temperature of 520℃. The mechanical properties
results show that the aging strengthening capacity of alloys decreased with
increasing Cr content. Scanning electron microscopic and X-ray diffraction were
used to analyze the correlation between the micro factors (such as phase
composition, phase content, phase size and phase morphology) and the macro
mechanical properties in different heat treatment conditions. The results show
that the aging strengthening mechanism of Ti5Mo5V3Al-xCr alloys is
mainly caused by the precipitation of αs phase in the
process of aging. The aging strengthening capacity of alloys is closely related
to the number of αs phase and the size of αs phase. The precipitation mechanism of αs phase is mainly dominated by the content of Cr element in
Ti5Mo5V3Al-xCr alloys.
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