Coupled effect of pulsed current and ultrasonic vibration on deformation behavior of Inconel 718 sheet: phenomena and modeling
Coupled effect of pulsed current and ultrasonic vibration on deformation behavior of Inconel 718 sheet: phenomena and modeling
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DOI：
10.1016/j.jmrt.2023.07.001
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发表时间：
2023-07
期刊：
影响因子：
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通讯作者：
Jiangpeng Yan;R. Zhao;M. Wan;B. Meng
中科院分区：
文献类型：
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作者：
Jiangpeng Yan;R. Zhao;M. Wan;B. Meng
多能量场为微成形工艺提供了更高的尺寸精度控制和期望的性能。基于Kocks-Mecking（K-M）模型，建立了描述脉冲电流与超声振动耦合作用的低应变本构模型。该模型结合晶体学理论，引入了声软化效应和电塑性效应，从能量吸收的角度描述了耦合场作用下脉冲电流与超声振动的相互作用。对厚度为0.3mm的Inconel 718合金板材进行了单轴拉伸试验。电流密度和超声能量密度的范围分别为20.9-50.9 A mm-2和15.84-57.64 J cm-3。结果表明：超声振动对位错生成的促进作用随着应变的增加而受到限制，超声振动产生的能量更多地反映在Helmholtz自由能的变化上;当无热条件下电流产生的能量趋于饱和时，热量的增加成为提高电塑性的关键，建立了焦耳热效应引起的加热模型。结合超声振动和脉冲电流的特点，建立了电脉冲-超声耦合处理的本构模型;利用超声能量密度和电流密度参数描述了流变应力;利用三角函数定量描述了超声振动和脉冲电流在外力作用下的竞争关系。通过两组实验验证了模型的可靠性。
Multi-energy fields provide higher dimensional precision control and desirable performance for microforming processes. The constitutive model under low strain level was established to describe the coupled effect of pulsed current and ultrasonic vibration based on the Kocks-Mecking (K-M) model. Combined with the crystallographic theory, the model introduced acoustic softening effect and electroplastic effect, and described the interaction between pulsed current and ultrasonic vibration under coupled field from the perspective of energy absorption. In the research, the uniaxial tensile test of Inconel 718 sheet with thickness of 0.3 mm was carried out. The ranges of the current density and ultrasonic energy density were 20.9–50.9 A mm−2and 15.84–57.64 J cm−3, respectively. The results showed that: the facilitation of ultrasonic vibration on dislocation generation was limited with the increase of strain, and the energy generated by ultrasonic vibration was more reflected in the change of Helmholtz free energy; when the energy generated by the current at athermal condition tended to be saturated, the increase of heat became the key to improve the electroplasticity, and the heating model caused by Joule heating effect was established. The constitutive model of coupling electric pulse and ultrasonic treatment was established, combining the characteristics of ultrasonic vibration and pulsed current; the flow stress was described by using the parameters of ultrasonic energy density and current density; The trigonometric function was used to quantitatively describe the competitive relationship between ultrasonic vibration and pulsed current in external work. Two sets of experiments were used to demonstrate the reliability of the model.