Laser assisted direct energy deposition of Hastelloy-X

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

doi:10.1016/j.optlastec.2018.07.037

Laser assisted direct energy deposition of Hastelloy-X

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

SCEDT Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	14-19
Journal	Optics and Laser Technology
Volume	109
DOIs	https://doi.org/10.1016/j.optlastec.2018.07.037
Publication status	Published - 1 Aug 2018

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title = "Laser assisted direct energy deposition of Hastelloy-X",

abstract = "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.",

author = "A.N. Jinoop and C.P. Paul and K.S. Bindra",

year = "2018",

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doi = "10.1016/j.optlastec.2018.07.037",

language = "English",

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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 - https://www.scopus.com/pages/publications/85050801701

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 -

Laser assisted direct energy deposition of Hastelloy-X

Abstract

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