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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.
RSC advances
|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.
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.
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