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非接触式超声波,以协助激光增材制造

Jiasen Han¹, Shuhao Wang², Wenjun Ge³

¹State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, P. R. China.

Nature communications

|August 15, 2025

概括

这项研究表明,在激光化增材制造中,声波流动,而不是空洞化,精炼了颗粒. 低强度超声波创建了一个稳定的池,用于在大样本中均的粒度提炼.

科学领域:

材料科学材料科学材料科学
制造业工程制造工程
声学声学在声学方面

背景情况:

传统的超声波辅助激光化依赖于声波化来精制谷物.
在固化过程中,声流在谷物精炼中的作用通常被认为是可以忽略不计的.
目前的方法在大规模增材制造中实现统一的谷物提炼方面面临挑战.

研究的目的:

在添加剂制造中使用低强度超声波在化值以下的低强度超声波来研究谷物精炼.
探索由声流和马兰戈尼力驱动的谷物精炼机制.
开发一种非接触式超声波方法,用于稳定的池调制和均的粒度提炼.

主要方法:

在激光化过程中应用非接触,低强度超声波 (低于化化值).
在纯声流条件下分析池动态.
微观结构的表征,以评估颗粒大小和形态.

主要成果:

在没有声学空洞化的情况下,可以获得精细的等粒.
声波流与马兰戈尼力相结合,诱导高频震动的融化流.
这种融化流导致树突疲劳骨折,导致谷物精炼.
低强度超声波使得稳定的池调制能够在大型样本中实现均的粒度提炼.

结论:

声波流,与马兰戈尼效应结合,是激光炼中颗粒精炼的可行机制.
无接触,低强度超声波为增材制造中的统一谷物精炼提供了一个有前途的方法.
这种方法克服了当前用于大规模应用的直接接触超声波技术的局限性.

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