Experimental study of thermomechanical behaviour of Gum Metal during cyclic tensile loadings: the quantitative contribution of IRT and DIC
Experimental study of thermomechanical behaviour of Gum Metal during cyclic tensile loadings: the quantitative contribution of IRT and DIC
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DOI：
10.1080/17686733.2023.2205762
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发表时间：
2023-05-31
影响因子：
2.5
通讯作者：
Pieczyska, Elzbieta A.
中科院分区：
文献类型：
--
作者：
Golasinski, Karol M.;Maj, Michal;Pieczyska, Elzbieta A.
胶态金属（ti - 23nb -0.7 ta -2.0 zr -1.2 2o, at）的热力学行为利用红外热像仪和数字图像相关技术，实验研究了循环张力作用下的温度。确定了胶金属后续加载-卸载循环的特定阶段的热力学特征，即(I)线性弹性加载伴随温度下降，（II）与温度增长相关的非线性超弹性加载，（III）瞬态阶段（超弹性行为和塑性行为同时存在），温度开始快速增长。（IV）温度显著升高的塑性变形，(V)温度快速下降的超弹性类卸载，（VI）温度下降较慢的瞬态卸载，（VII）温度略有升高的弹性卸载。在每个拉伸循环中，分析了胶金属在加载和卸载过程中的热弹性效应。最后，讨论了各循环卸载前应变场和温度场的演变规律，并对循环12和循环24中各阶段的应变场和温度场进行了比较。这项工作的结果使我们能够识别弹性和超弹性变形的非耗散过程以及塑性变形的耗散过程。
Thermomechanical behaviour of Gum Metal (Ti-23Nb-0.7Ta-2.0Zr-1.2O, at.%) under cyclic tension was experimentally investigated using infrared thermography and digital image correlation. The thermomechanical characteristics of particular stages of the subsequent loading-unloading cycles of Gum Metal were identified, i.e. (I) the linear, elastic loading accompanied by the temperature drop, (II) the nonlinear super-elastic loading related to the temperature growth, (III) the transient stage (at which both the superelastic-like behaviour and the plastic one are present simultaneously) and the temperature starts growing fast, (IV) the plastic deformation with a significant growth of temperature, (V) the superelastic-like unloading accompanied by a fast drop in temperature, (VI) the transient unloading with a slower decrease in temperature and (VII) the elastic unloading, with a slight increase in temperature. Thermoelastic effect in Gum Metal during both loading and unloading was analysed in each tensile cycle. Finally, the evolution of strain and temperature fields just before unloading in each cycle was discussed and a comparison of the fields at selected stages of cycles 12 and 24 was presented. The results of this work enabled us to identify the non-dissipative processes of elastic and superelastic-like deformations as well as the dissipative process of plastic deformation.