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超快激光处理对无形结构的影响 - 基于分子动力学模拟.

Shijia Liu¹, Jiaqi Liu², Jialin Liu²

¹School of OptoElectronic Engineering, Changchun University of Science and Technology Changchun 130022 China.

|December 10, 2024

概括

超高速激光加工Ni-Fe合金通过加快结晶来改进表面结构. 增强的能量沉积减少了缺陷的形成和处理时间,为材料动态提供了洞察力.

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科学领域:

材料科学材料科学材料科学
表面工程是什么?表面工程是什么?
计算物理计算物理

背景情况:

超快的激光处理为微/纳米制造提供了高精度.
由于时间短,观察超快激光物质相互作用具有挑战性.

研究的目的:

研究Ni-Fe合金表面无形缺陷的超快激光处理.
分析能量沉积对结晶行为的影响.
了解激光治疗期间的核和生长机制.

主要方法:

使用了分子动力学模拟.
模拟专注于纳秒时间尺度事件.
分析能量沉积对Ni-Fe合金表面结构的影响.

主要成果:

结晶温度随着温度变化的速度而增加.
增强的能量沉积加速了晶格形成和原子排序.
结晶时间从4.5 ns缩短到3.2 ns;晶格相过渡在0.5 ns内完成.
升高的化温度将无形相位比例降至最低.

结论:

模拟结果阐明了激光处理的Ni-Fe合金中的核和生长机制.
提供了关于超快激光对表面格子结构和原子动态的影响的见解.
建立了先进材料加工技术的理论基础.