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采用扫描电子显微镜(SEM)、电子背散射衍射分析(EBSD)、X射线衍射分析(XRD)等手段,对锻造态和固溶时效态Ti合金的显微组织、物相组成和力学性能进行了分析。结果表明,锻造态的Ti合金中主要含有α相和β相,而固溶态Ti合金由单一β相组成;随着时效温度的升高,Ti合金中的次生α相的体积分数减小,而宽度增大;时效处理后Ti合金的强度比固溶态有所增加,而塑性有所降低;随着时效温度的升高合金的抗拉强度和屈服强度减小,而断后伸长率和断面收缩率增加。
The microstructure, phase composition and mechanical properties of forged and solution-aged Ti alloys were characterized by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) analysis. The results show that the as-forged Ti alloy mainly contains α phase and β phase, while the solid solution Ti alloy consists of a single β phase. With the increase of aging temperature, the volume fraction of secondary α phase in Ti alloy decreases , While the width increases; the strength of the Ti alloy after aging treatment is increased than the solution state, while the plasticity is reduced; with the aging temperature increases, the tensile strength and yield strength of the alloy decreases, while the elongation at break And the cross-section shrinkage increased.