TY - JOUR
T1 - Laser assisted direct energy deposition of Hastelloy-X
AU - Jinoop, A.N.
AU - Paul, C.P.
AU - Bindra, K.S.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - Laser additive manufacturing using direct energy deposition (LAM-DED) process uses laser beam to melt powder particles and a thin layer of substrate/previously deposited material for building near net shape of engineering components. This communication reports the process development for LAM-DED of Hastelloy-X (Hast-X) and its characterization. Process window is developed through experimental program by varying LAM-DED process parameters for defect free deposition of Hast-X at maximum deposition rate. Optical microscopy shows microstructures with fine dendrites, while the presence of FCC matrices with fine crystallites (size = 25.56 nm) are revealed during X-ray diffraction studies. Residual stress measurement reveals predominantly tensile stress on the deposited surface with a maximum value of 252 MPa. Atomic Force Microscopy revealed uniform surface topography and measured average micro-hardness is 239 HV1.96N. This research work paves a way for the fabrication of Hast-X components for various engineering applications.
AB - Laser additive manufacturing using direct energy deposition (LAM-DED) process uses laser beam to melt powder particles and a thin layer of substrate/previously deposited material for building near net shape of engineering components. This communication reports the process development for LAM-DED of Hastelloy-X (Hast-X) and its characterization. Process window is developed through experimental program by varying LAM-DED process parameters for defect free deposition of Hast-X at maximum deposition rate. Optical microscopy shows microstructures with fine dendrites, while the presence of FCC matrices with fine crystallites (size = 25.56 nm) are revealed during X-ray diffraction studies. Residual stress measurement reveals predominantly tensile stress on the deposited surface with a maximum value of 252 MPa. Atomic Force Microscopy revealed uniform surface topography and measured average micro-hardness is 239 HV1.96N. This research work paves a way for the fabrication of Hast-X components for various engineering applications.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85050801701&partnerID=MN8TOARS
U2 - 10.1016/j.optlastec.2018.07.037
DO - 10.1016/j.optlastec.2018.07.037
M3 - Article
SN - 0030-3992
VL - 109
SP - 14
EP - 19
JO - Optics and Laser Technology
JF - Optics and Laser Technology
ER -