Effect of Current Waveform on Electrically-assisted Forming of Fe78Si9B13 Amorphous Alloy Strips

LIU Jianshuai; WANG Ze; DU Wangzhe; LIU Yuanming; NIU Xiaomiao

doi:10.3969/j.issn.1674-6457.2026.01.019

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (1) : 205-214. DOI: 10.3969/j.issn.1674-6457.2026.01.019

High-Entropy Alloy and Amorphous Alloy Forming

Effect of Current Waveform on Electrically-assisted Forming of Fe₇₈Si₉B₁₃ Amorphous Alloy Strips

LIU Jianshuai^1,2,3, WANG Ze^1,2,3, DU Wangzhe^1,2,3, LIU Yuanming^1,2,3, NIU Xiaomiao^1,2,3,4,*

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Abstract

The work aims to employ an electrically-assisted forming technology with tunable multi-parameters to systematically investigate the effects of current waveforms and forming temperature on the formability of iron-based amorphous alloy strips. Firstly, an experimental platform capable of electrical parameter modulation, stress loading, and real-time temperature monitoring was established. Subsequently, punching and forming experiments were conducted on amorphous alloy strips to investigate their mechanical properties and forming quality under electric current excitation. Post-experiment analyses, including differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM), were systematically performed to characterize fracture morphology and microstructural evolution. With the increase of the forming temperature, the fracture load and displacement of the amorphous alloy strips exhibited a nonlinear escalation. The improvement was more significant at 400 ℃ compared to 200 ℃ and 300 ℃. At the same forming temperature, the most significant effect of current waveforms on formability of amorphous alloy strips was direct current (DC), followed by pulsed current (PC), and the effect of alternating current (AC) was poor. Through X-ray diffraction and fracture morphology analysis, it was found that the amorphous alloy showed a transition from ductile to brittle behavior, eventually crystallizing with the increase of forming temperature. The application of current can effectively improve the forming performance of Fe₇₈Si₉B₁₃amorphous alloy strips. Compared with the current waveform, the effect of the forming temperature is more significant. The combined effect of current and external stress lowers the crystallization temperature of the amorphous alloy strips. When the forming temperature is the same, there is a significant difference in the effect of the current loaded with different waveforms on the plastic deformation ability of Fe₇₈Si₉B₁₃ amorphous alloy strips, following the trend: “direct current (DC), pulsed current (PC), alternating current (AC)”.

Key words

amorphous alloy / current waveform / electrically-assisted forming / deformation mechanism / forming temperature

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LIU Jianshuai, WANG Ze, DU Wangzhe, LIU Yuanming, NIU Xiaomiao. Effect of Current Waveform on Electrically-assisted Forming of Fe₇₈Si₉B₁₃ Amorphous Alloy Strips[J]. Journal of Netshape Forming Engineering. 2026, 18(1): 205-214 https://doi.org/10.3969/j.issn.1674-6457.2026.01.019

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Funding

The National Natural Science Foundation of China (52105391, 52375367); State Key Laboratory of Metal Forming Technology and Heavy Equipment Open Fund (S2308100.W21); Shanxi Provincial Fundamental Research Program (202303021212054); Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2024Q008); Hai'an and Taiyuan University of Technology Advanced Manufacturing and Intelligent Equipment Industrial Research Institute Open Fund (2024HA-TYUTKFYF009)