Abstract

The elastic (Young’s) modulus and relaxation properties (amplitude-independent internal friction) of bcc metals and alloys (vanadium, V–4Cr–4Ti, V–W–Cr, and V–Ta–Cr—Zr alloys) have been studied in the temperature range of 25–400°С by means of dynamic mechanical spectroscopy within a low-frequency range (0.5–30.0 Hz). No carbon in vanadium and V–W–Cr alloy in solid-solution state is revealed. In the case of vanadium and V–W–Cr alloy, the solid-solution concentrations of oxygen and nitrogen and the diffusion characteristics thereof (diffusion activation energy, characteristic relaxation time, and the preexponential factor in the diffusion equation) have been determined. In the case of V–4Cr–4Ti alloy, carbon, oxygen, and nitrogen solid solutions have not been observed. In V–Ta–Cr–Zr alloy, the solid-solution concentrations of interstitial atoms (C, O, N) are substantially lower than those in vanadium and V–W–Cr alloy. The values of elastic modulus in vanadium alloys can be either higher or lower than the elastic modulus inherent in vanadium depending on type of alloy (alloying) and on temperature. The V–4Ti–4Cr alloy exhibits the smallest value of the elastic modulus among all the materials under study. The temperature curves of the elastic (Young’s) modulus for the studied materials exhibit no features, except for a slight local relaxation of the Young’s modulus in the case of vanadium and V–W–Cr alloy in the temperature range of the relaxation peaks.

中文翻译：

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钒和V–4Cr–4Ti，V–W–Cr，V–Ta–Cr–Zr合金中间隙C，O，N原子和弹性模量的浓度和扩散特性

摘要

已经对bcc金属和合金（钒，V–4Cr–4Ti，V–W–Cr和V–Ta–Cr-Zr合金）的弹性（杨氏）模量和弛豫特性（与振幅无关的内摩擦）进行了研究。通过动态机械光谱法在低频范围（0.5-30.0 Hz）内将温度范围定为25-400°С。钒和钒-铬合金固溶态无碳。在钒和VW-Cr合金的情况下，已经确定了氧和氮的固溶体浓度及其扩散特性（扩散活化能，特征弛豫时间和扩散方程中的预指数因子）。在V–4Cr–4Ti合金的情况下，未观察到碳，氧和氮的固溶体。在V–Ta–Cr–Zr合金中，间隙原子的固溶浓度（C，O，N）大大低于钒和V-W-Cr合金中的含量。钒合金中的弹性模量值可以高于或低于钒中固有的弹性模量，具体取决于合金（合金）的类型和温度。在所有研究的材料中，V–4Ti–4Cr合金的弹性模量值最小。所研究材料的弹性（杨氏）模量的温度曲线没有任何特征，除了在松弛峰的温度范围内钒和V–W–Cr合金的情况下，杨氏模量略有局部松弛。钒合金中的弹性模量值可以高于或低于钒中固有的弹性模量，具体取决于合金（合金）的类型和温度。在所有研究的材料中，V–4Ti–4Cr合金的弹性模量值最小。所研究材料的弹性（杨氏）模量的温度曲线没有任何特征，除了在松弛峰的温度范围内钒和V–W–Cr合金的情况下，杨氏模量略有局部松弛。钒合金中的弹性模量值可以高于或低于钒中固有的弹性模量，具体取决于合金（合金）的类型和温度。在所有研究的材料中，V–4Ti–4Cr合金的弹性模量值最小。所研究材料的弹性（杨氏）模量的温度曲线没有任何特征，除了在松弛峰的温度范围内钒和V–W–Cr合金的情况下，杨氏模量略有局部松弛。