首页|In-situ monitoring plume,spattering behavior and revealing their relationship with melt flow in laser powder bed fusion of nickel-based superalloy

In-situ monitoring plume,spattering behavior and revealing their relationship with melt flow in laser powder bed fusion of nickel-based superalloy

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Laser powder bed fusion(LPBF)is a highly dynamic and complex physical process,and single-track de-fects tend to accumulate into non-negligible internal defects of parts.The nickel-based superalloy single track was fabricated by LPBF,and its plume and spattering behavior were monitored in situ and recorded in real time based on image recognition and tracking in this study.The relationship among laser energy density,melt flow,plume and spattering behavior during LPBF was discussed.Volumetric energy density had limitations as a design parameter for LPBF.However,we found that plume and spattering behavior can be used as real-time design parameters for the processing of LPBF parts and implemented the initial velocity statistics for LPBF single-track spattering based on the centroid extraction algorithm.The influ-ence of melt flow evolution paths on the spattering and plume behavior in three different melting modes was revealed,and a shift in plume behavior was found in the overlap region of the additive substrate.This study provides a new method for obtaining statistics of spattering-related physical quantities in the melting mode,which is beneficial for the development of processing methods to mitigate the instability of the LPBF process.

Laser powder bed fusionPlume behaviorSpattering behaviorIn-situ monitoringIckel-based superalloy

You Wang、Wei Guo、Yinkai Xie、Huaixue Li、Caiyou Zeng、Ming Xu、Hongqiang Zhang

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School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China

Science and Technology on Power Beam Processes Laboratory,AVIC Manufacturing Technology Institute,Beijing 100024,China

Key Laboratory of Aeronautical Technology on Additive Manufacturing,AVIC Manufacturing Technology Institute,Beijing 100024,China

Defense Industrial Technology Development ProgramNational Science and Technology Major ProjectNational Science and Technology Major ProjectNational Science and Technology Major Project

JCKY2019205A002J2019-Ⅳ-0012-0080J2019-Ⅶ-0004-0144Y2022-Ⅶ-0007

2024

10.1016/j.jmst.2023.07.068

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.177(10)
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