【摘要】 采用美国TA仪器公司的动力学分析仪（Q800）研究了水淬的含碳Ti-35.4Nb-0.05C（wt.%）和不含碳Ti-35.4Nb（wt.%）合金的内耗行为。实验结果表明:两种合金的内耗—温度曲线上都存在一个弛豫型的内耗峰,含碳的Ti-35.4Nb-0.05C内耗峰的弛豫激活能Hq=1.82±0.1eV,指数前因子τ_0q=1.7×10^-19±1s。这个激活能值比不含碳水淬的Ti-35.4Nb合金的激活能稍大,同时,含碳水淬的Ti-35.4Nb-0.05C合金的内耗峰高度比水淬的Ti-35.4Nb合金低,初步推断是因为C的添加抑制了O引起的弛豫强度。更多还原

【Abstract】 The internal friction behavior of water-quenched Ti-35.4 Nb-0.05 C（wt.%） and Ti-35.4 Nb（wt.%） alloys was investigated using a dynamic mechanical analysis（DMA） Q800 from TA Instruments. It has been shown that a relaxational internal friction peak is observed on internal friction（tanδ）-temperature curves for the two alloys. The activation energy and pre-exponential factor of the peak are Hq=1.82±0.1 eV and τ_{0 q}=1.7×10^{-19 ±1} s,respectively. The activation energy value of the water-quenched Ti-35.4 Nb-0.05 C is a little larger than that of the water-quenched Ti-35.4 Nb alloy and its peak height is decreased compared with the water-quenched Ti-35.4 Nb alloy. It can be deduced that the addition of C suppressed the relaxation strength induced by O in the Ti-Nb alloys.更多还原