Laser assisted direct energy deposition of Hastelloy-X

A.N. Jinoop, C.P. Paul, K.S. Bindra

Research output: Contribution to journalArticlepeer-review


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.
Original languageEnglish
Pages (from-to)14-19
JournalOptics and Laser Technology
Publication statusPublished - 1 Aug 2018


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