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Synergistic enhancement of machinability and surface integrity in bulk metallic glasses via cold plasma pretreatment and ultrasonic vibration-assisted micro-milling
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Qilin LI1,2, Emek Babuskin KOCYIGIT1,2, Long YE3, Nan YU3, Pingfa FENG1,2, Jianjian WANG1,2. Synergistic enhancement of machinability and surface integrity in bulk metallic glasses via cold plasma pretreatment and ultrasonic vibration-assisted micro-milling[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .
@article{title="Synergistic enhancement of machinability and surface integrity in bulk metallic glasses via cold plasma pretreatment and ultrasonic vibration-assisted micro-milling",
author="Qilin LI1,2, Emek Babuskin KOCYIGIT1,2, Long YE3, Nan YU3, Pingfa FENG1,2, Jianjian WANG1,2",
journal="Journal of Zhejiang University Science A",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2500552"
}
%0 Journal Article
%T Synergistic enhancement of machinability and surface integrity in bulk metallic glasses via cold plasma pretreatment and ultrasonic vibration-assisted micro-milling
%A Qilin LI1
%A 2
%A Emek Babuskin KOCYIGIT1
%A 2
%A Long YE3
%A Nan YU3
%A Pingfa FENG1
%A 2
%A Jianjian WANG1
%A 2
%J Journal of Zhejiang University SCIENCE A
%V -1
%N -1
%P
%@ 1673-565X
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2500552
TY - JOUR
T1 - Synergistic enhancement of machinability and surface integrity in bulk metallic glasses via cold plasma pretreatment and ultrasonic vibration-assisted micro-milling
A1 - Qilin LI1
A1 - 2
A1 - Emek Babuskin KOCYIGIT1
A1 - 2
A1 - Long YE3
A1 - Nan YU3
A1 - Pingfa FENG1
A1 - 2
A1 - Jianjian WANG1
A1 - 2
J0 - Journal of Zhejiang University Science A
VL - -1
IS - -1
SP -
EP -
%@ 1673-565X
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2500552
Abstract: bulk metallic glasses (BMGs) exhibit exceptional properties, but are difficult to machine due to their high hardness and brittleness. In this study we propose a novel hybrid machining strategy integrating cold plasma (CP) pretreatment with ultrasonic vibration-assisted micro-milling (UVAM), termed CP-UVAM, to overcome these challenges. We reveal the fundamental mechanism by which CP independently optimizes machining: it transforms the BMG surface from hydrophobic to super-hydrophilic (contact angle <10˚) through oxidation and the introduction of polar groups, thereby enhancing lubricant penetration. Crucially, CP treatment increases the near-surface free volume, significantly improving plastic deformability, as evidenced by nanoindentation (15-20% reduction in first pop-in force) and nano-scratching tests. Four methods-Conventional Milling (CM), CP-assisted Milling (CPAM), UVAM, and CP-UVAM-were systematically compared. While CPAM alone delivered the best surface finish and least tool wear, UVAM achieved a 29.02% cutting force reduction at the cost of severe tool edge chipping. The synergistic CP-UVAM approach retained the force reduction advantage of UVAM (34.36% reduction vs CM) while dramatically mitigating UVAM-induced tool damage, reducing edge chipping by 43.97% and achieving superior surface consistency (an Sa value of 2.601 µm in the stable state). This study demonstrates that CP independently enhances BMG machinability and works synergistically with UVAM, enabling high-precision micro-milling of this challenging material through the combination of plasma-induced plasticity and wettability with ultrasonic vibration-assisted force reduction.
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