Direct Metal Deposition Of Stainless Steel Using Wire Feed Method : An Experimental Study On Microstructural Development And Microhardness Variations

Mohd Seiful Ezuan, Sayuti (2010) Direct Metal Deposition Of Stainless Steel Using Wire Feed Method : An Experimental Study On Microstructural Development And Microhardness Variations. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

An experimental research titled “Direct Metal Deposition of Stainless Steel using Wire Feed Method: An Experimental Study on Microstructural Development and Microhardness Variations” has been carried out. The overall aim is to investigate how different deposition parameters affected microstructure and hardness variation of stainless steel deposited material. The deposition process will be conducted using metal inert gas (MIG) weld method. Background knowledge about direct metal deposition including form of materials, heat sources and its commercial application in relation to its welded, process parameter, microstructural properties and microhardness variation also reviewed. This experimental method involves manipulating one variable (deposition parameter) to determine if changes in this variable cause changes in another variable (microstructure and hardness variation). This method relies on controlled methods and the manipulation of variables to test a hypothesis. Finally, the hardness variation of as-deposited stainless steel was inspected using Rockwell test and its microstructure behavior was inspected using optical microscopy. In addition, Design Expert Software that implemented response surface methodology technique has been used in order to make sure the optimization of parameters while conducting this experimental research. This research had successfully analyzed the data collected from this experimental research. The effect of welding parameters such as current, arc voltage and travel speed are directly affected microstructural development and microhardness variations of stainless steel deposited material. Finally, the suggestions to enhance the optimization of parameter in direct metal deposition also had been discussed.

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