02515nas a2200265   4500008004100000022001400041245014400055210006900199260000800268300001100276490000800287520155500295653001501850653001701865653002601882653003201908653003601940100002801976700002002004700001702024700002202041700002802063700003002091856012802121       2022                        eng d  a0921-509300aStudy on anisotropy in wire arc additively manufactured Inconel 625 multi-layered wall and its correlation with molten pool thermal history0 aStudy on anisotropy in wire arc additively manufactured Inconel   cAPR  a1428650 v8403 a<p>
	In the present study, the variation in molten pool thermal history with layer number during wire arc additive manufacturing of Inconel 625 wall was investigated. Further, its effect on the evolution of microstructure and anisotropy in mechanical and corrosion properties was reported. During the deposition process, the molten pool thermal history was monitored using a non-contact type IR pyrometer operating at 1.6 mu m wavelength. A total number of 40 layers were deposited, building a wall of 60 mm height. With an increase in layer number, the molten pool lifetime and cooling rate were found to increase and decrease, respectively, resulting in coarse grains and increased elemental segregation or Laves phase formation. To investigate its effect on mechanical properties, the samples were collected in a skewed fashion along the height with orientation in the deposition direction. The tensile specimens collected close to the substrate exhibited better strength and ductility, while the samples from the top location of the wall exhibited a relatively brittle mode of fracture, which was investigated by carrying out the fracture surface analysis using SEM. Corrosion test was also conducted along the height of the wall, wherein the samples close to substrate exhibited better corrosion resistance due to refined microstructure and low elemental segregations. Further, EDS, XRD analysis and hardness test were carried out to investigate the elemental composition, variation in phases and hardness with layer number, respectively.</p>
10aanisotropy10aLayer number10amechanical properties10aMolten pool thermal history10aWire arc additive manufacturing1 aNagallapati, Vishwanath1 aChoudhary, Amit1 aTorris, Arun1 aMuvvala, Gopinath1 aDadasaheb, Sagar, Pawar1 aGudur, Srinath, Ellaswamy  uhttps://library.ncl.res.in/content/study-anisotropy-wire-arc-additively-manufactured-inconel-625-multi-layered-wall-and-its