Characteristics and mechanism in ultrasonic vibration-assisted deformation of Ni-based superalloy thin-walled sheet by quasi-in-situ EBSD

Shao, Guangda; Li, Hongwei; Zhang, Xin; Zhan, Mei; Xiang, Zhiyu

doi:10.1016/j.jallcom.2022.164591

Cited by 10 publications

(1 citation statement)

References 36 publications

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“…Ni et al [13] investigated the effect of ultrasonic vibration-assisted milling (UVAM) and minimum quantity lubrication (MQL) on the machining performance of TC4 alloy; the results show that cutting force features could be significantly affected under the UVAM and UVAM&MQL condition compared with that in general milling, and the uniform micro-textured surfaces with improved profile fluctuations could be obtained when applying the UVAM&MQL strategy. Some scholars have found that the application of ultrasonic vibration in tensile tests of materials such as zinc, magnesium and nickel promotes grain refinement, improves material plasticity and reduces both yield stress and flow stress [14,15]. Storck et al [16] found that ultrasonic vibration has both acoustic softening and hardening effects on materials.…”

Section: Introductionmentioning

confidence: 99%

Study on Characteristics of Ultrasound-Assisted Fracture Splitting for AISI 1045 Quenched and Tempered Steel

Jiang,

Wang,

Liu

et al. 2024

Materials

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Ultrasonic vibration-assisted con-rod fracture splitting (UV-CFS) was used to carry out the fracture experiment of 1045 quenched and tempered steel. The effect of ultrasonic vibration on the fracture properties was studied, the fracture microstructure and the evolution of dislocations near the fracture were analyzed and the microscopic mechanism was analyzed. The results show that in the case of conventional fracture splitting without amplitude, the dimple and the fracture belong to ductile fracture. With the increase in ultrasonic amplitude, the plasticity and pore deformation of the con-rod samples decrease at first and then increase; when the amplitude reaches a certain point, the load required for cracking is reduced to a minimum and the ultrasonic hardening effect is dominant, resulting in a decrease in the plasticity of the sample, a cleavage fracture, a brittle fracture, the minimum pore deformation and high cracking quality. The research results also show that with the increase in ultrasonic amplitude, the fracture dislocation density decreases at first, then increases, and dislocation entanglement and grain breakage appear, then decrease, and multiple dislocation slip trajectories appear. The changes in the dislocation density and microstructure are consistent with the above results.

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