High-temperature dependency of elastic mechanical behavior of two wrought magnesium alloys AZ31B and ZK60A studied by resonant ultrasound spectroscopy
High-temperature dependency of elastic mechanical behavior of two wrought magnesium alloys AZ31B and ZK60A studied by resonant ultrasound spectroscopy
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DOI：
10.1016/j.msea.2019.04.115
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
E. Garlea;M. Radovic;P. Liaw
中科院分区：
文献类型：
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作者：
E. Garlea;M. Radovic;P. Liaw
使用共振超声光谱 (RUS) 研究两种变形镁合金 AZ31B 和 ZK60A 在 25°C 至 450°C 温度范围内的弹性机械性能和内摩擦。以 50°C 的间隔对轧制方向、横向和法向方向的样品进行表征，以确定每个方向的弹性模量和刚度的温度依赖性。本文提供了表示为 dE/dT、dG/dT、dB/dT、dC11/dT、dC12/dT 和 dC44/dTa 的温度依赖性。为了评估这些类型合金的 RUS 技术，还通过传统静态拉伸测试测定了杨氏模量，并对结果进行了比较。根据相同的 RUS 实验，计算了两种合金的内耗随温度的变化。确定了所考虑的温度范围内每个方向的热膨胀线性系数，因为需要它们来估计 RUS 测量中高温下的样品尺寸。这项研究表明，RUS 可以成为一种方便而准确的技术，可以提供定量弹性力学数据并填补轻金属表征方面的现有空白。
Resonant ultrasound spectroscopy (RUS) was used to study the elastic mechanical properties and internal friction of two wrought magnesium alloys, AZ31B and ZK60A, from 25 °C to 450 °C. Samples in the rolled, transverse, and normal directions were characterized at 50 °C intervals to determine the temperature dependency of elastic moduli and stiffnesses for each direction. The temperature dependencies represented as, dE/dT, dG/dT, dB/dT, dC11/dT,dC12/dT,and dC44/dTare provided herein. To evaluate the RUS technique for these type of alloys, Young's modulus was also determined by conventional static tension testing and the results were compared. From the same RUS experiment, the internal friction variation with temperature was calculated for both alloys. The linear coefficients of thermal expansion for each direction over the temperature range considered were determined, as they were needed to estimate sample dimension at elevated temperature for the RUS measurements.This study shows that RUS can be a convenient and accurate technique to supply quantitative elastic mechanical data and fill the existing gaps on light metals characterization.