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Cr含量對Ti5Mo5V3Al-xCr系合金組織及性能的影響
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更新時間：2015-08-18
對Ti5Mo5V3Al-xCr(x=1.0, 3.0, 5.0, 7.0, 9.0)系五種合金分別在β單相區(qū)和(α+β)兩相區(qū)固溶水淬處理后,并在同一溫度時效后的力學性能進行了研究。
Cr含量對Ti5Mo5V3Al-xCr系合金組織及性能的影響Effects of Cr Content on Microstructure and Mechanical
Properties of Ti5Mo5V3Al-xCr Alloys
對Ti5Mo5V3Al-xCr(x=1.0, 3.0, 5.0, 7.0,
9.0)系五種合金分別在β單相區(qū)和(α+β)兩相區(qū)固溶水淬處理后,并在同一溫度時效后的力學性能進行了研究。結果顯示,合金的時效強度隨著Cr含量的增加而逐漸降低。通過掃描電鏡SEM及XRD等分析測試手段,詳細分析了五種合金在各種熱處理狀態(tài)下的相構成、相含量、尺寸形貌等微觀因素與宏觀力學性能之間的相關性。結果顯示Ti5Mo5V3Al-xCr系合金的強化機制主要是由于時效過程中析出的αs相造成的。合金強化效應的大小則與αs相析出的數(shù)量、尺寸密切相關,而αs相的析出機制主要由Cr元素在合金系中的含量所決定。
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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