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Study on the Polishing Mechanism of Composite Magnetic Field-Controlled Internal Flow Channels in Additive
Hao Li1,2, Rui Wang3, Jinxu Zhang1,2
1Shandong Key Laboratory of CNC Machine Tool Functional Components, School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Materials (Basel, Switzerland)
|June 12, 2026
Summary
Magnetic abrasive finishing (MAF) effectively polishes additively manufactured internal channels by addressing surface defects. This study develops models for material removal, improving surface quality in complex components.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Surface Engineering
Background:
- Surface defects in additively manufactured internal channels hinder practical applications.
- Conventional post-processing methods have limitations in accessibility and precision.
- Magnetic abrasive finishing (MAF) presents a promising alternative due to its adaptability and control.
Purpose of the Study:
- To systematically investigate material removal mechanisms in MAF for internal channels.
- To differentiate and analyze transitions between two-body and three-body wear modes.
- To establish theoretical models for material removal in additively manufactured channels.
Main Methods:
- Development of rolling and sliding material removal models based on contact theory.
- Experimental validation using AlSi10Mg internal channels fabricated by selective laser melting (SLM).
- Utilizing a composite magnetic field polishing apparatus for the experiments.
Main Results:
- The proposed rolling and sliding removal models accurately predict material removal.
- MAF significantly reduces surface defects and roughness in SLM-fabricated internal channels.
- Experimental results validate the theoretical models, despite minor deviations.
Conclusions:
- This study provides a systematic theoretical framework for understanding MAF in complex internal channels.
- The developed models and experimental findings offer insights for optimizing MAF processes.
- MAF is a viable technique for improving the surface quality of additively manufactured components.
