• Lavpreet Singh

In this research a new form of manufacturing of wire and arc additives (WAAM), based on hot forging. The material is forged locally immediately after deposition during WAAM, and viscoelastic deformation occurs at high temperatures in-situ. Recrystallization of the previous solidification structure happens in the subsequent deposition of the sheet, which refines the microstructure. This version was called hot forging wire and arc additive manufacturing (HF-WAAM), due to its resemblance to hot forging. For the development of AISI316L stainless steel samples a customized WAAM torch was produced, manufactured, and tested. Forging forces 17 N and 55 N were applied to bend the material plastically. The results showed that this new variant refines the solidification microstructure and decreases the effects of texture, as determined by experiments with high-energy synchrotron X-ray diffraction, without interrupting the additive production cycle. Mechanical characterisation was accomplished and improvements were made on both yield strength and overall tensile strength. In addition, HF-WAAM has been observed to significantly affect porosity; pores created during the process have been closed by the process of hot forging. Since deformation occurs at high temperatures, the forces involved are minimal, and the WAAM equipment has no unique stiffness requirements, thus allowing this new model to be integrated into traditional moving equipment such as multi-axis robots or 3-axis table used in WAAM.

Directed Energy Deposition, Forging, Grain Refining, Wire and Arc Additive Manufacturing, Viscoplastic Deformation, Stainless Steel.

"Manufacture of Hot Forging Cables and Arc Additives", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.202-210, January 2019, Available :http://www.jetir.org/papers/JETIREO06044.pdf

"Manufacture of Hot Forging Cables and Arc Additives", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp202-210, January 2019, Available at : http://www.jetir.org/papers/JETIREO06044.pdf