Abstract
Laser-Directed Energy Deposition (DED), a Metal Additive Manufacturing Method, is Renowned for its Role in Repairing Parts, Particularly When Replacement Costs Are Prohibitive. Ensuring that Repaired Parts Avoid Residual Stresses and Deformation is Crucial for Maintaining Functional Integrity. This Study Conducts Experimental and Numerical Analyses on Trapezoidal Shape Repairs, Validating Both the Thermal and Mechanical Models with Experimental Results. Additionally, the Study Presents a Methodology for Creating a Toolpath Applicable to Both the DED Process and Abaqus CAE Software. the Findings Indicate that Employing a Pre-Heating Strategy Can Reduce Residual Stresses by over 70% Compared to No Pre-Heating. However, Pre-Heating May Not Substantially Reduce Final Distortion. Notably, Final Distortion Can Be Significantly Mitigated by Pre-Heating and Subsequently Cooling to Higher Temperatures, Thereby Reducing the Cooling Rate. These Insights Contribute to Optimizing DED Repair Processes for Enhanced Part Functionality and Longevity.
Recommended Citation
U. Tariq et al., "Effect of Pre-Heating on Residual Stresses and Deformation in Laser-Based Directed Energy Deposition Repair: A Comparative Analysis," Materials, vol. 17, no. 10, article no. 2179, MDPI, May 2024.
The definitive version is available at https://doi.org/10.3390/ma17102179
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Open Access
International Standard Serial Number (ISSN)
1996-1944
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 May 2024
Comments
Missouri University of Science and Technology, Grant CMMI 1625736