Direct Metal Deposition of Stainless Steel Wire Using Metal Inert Gas as Heat Source for Repair Purposes

Abstract:

Direct metal deposition (DMD) using wire feedstock than powder feeding offers potential advantages such as high material usage efficiency and deposition rate and therefore employed in this work. The deposition process was conducted using metal inert gas (MIG) as the heat source. This study involves manipulating one variable that is deposition parameter to determine if changes in this variable cause changes in another variable that is microstructure and hardness variation. The deposited material was characterized by means of optical microscope and Rockwell microhardness testing machine. In addition, Design Expert Software that implemented Response Surface Methodology (RSM) technique was used in determining optimization of parameters. Results from the software were compared to the results obtained from the experimental works. This study shows that the deposition parameters such as current, arc voltage and travel speed significantly affect the microstructural development and microhardness variations of the stainless steel deposited structure. At the end of this study, directions for future work were suggested in order to further enhance the microstructural and microhardness properties of deposited material.)

• Periodical: Applied Mechanics and Materials (Volumes 110-116)
• Pages: 3570-3574
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.110-116.3570
• Online since: October 2011
• Authors: Nur Izan Syahriah Hussein, Mohd Seiful Ezuan Sayuti, Mohamad Nizam Ayof
• Keywords: Direct Metal Deposition, Metal Inert Gas, Microhardness, Response Surface Method (RSM), Stainless Steel (SS)

References

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DOI: 10.1557/proc-625-9

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