Effect of Laser Shock Peening (LSP) on the Phase Evolution, Residual Stress and Hardness of Hastelloy-X Superalloys

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Abstract

Efforts have been made to understand the effect of laser shock peening (LSP) on the phase, residual stress and hardness of Hastelloy-X superalloys. A 10 J Nd:YAG laser was used for the LSP operation. Following LSP detailed microstructural and phase analysis along with residual stress and hardness studies were undertaken. A parametric window was first established to explore the relationship between LSP process parameters and the respective surface and bulk properties. The effects of an absorptive layer on the properties of the modified layer were also investigated. Qualitative and quantitative information on dislocation density was obtained using X-ray diffraction (XRD) analysis and correlated with the processing parameters. Residual stress developed following
LSP was measured using the XRD technique. An increase in the hardness of the Ni-based superalloys was observed. The residual stress on the surface of the laser shock peened Hastelloy-X superalloy showed a maximum compressive stress of 166 MPa. A detailed microstructure-property relationship was established to understand the mechanism of property enhancement. Further optimization of the LSP process to surface treat the Hastelloy-X superalloys will open up new avenues for the material’s applicability, particularly in the aerospace sector.
Original languageEnglish
Pages (from-to)97-112
Number of pages16
JournalLasers in Engineering
Volume39
Issue number1-2
Publication statusPublished - 2018

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peening
Hastelloy (trademark)
Shot peening
heat resistant alloys
Superalloys
residual stress
Residual stresses
hardness
Hardness
shock
Lasers
lasers
diffraction
surface properties
YAG lasers
Compressive stress
x rays
X ray diffraction analysis
sectors
microstructure

Keywords

  • Nd:YAG laser
  • Hastelloy-X, superalloy
  • Absorptive layer
  • Laser shock peening (LSP)
  • Residual stresses
  • Hugoniot elastic limit (HEL)
  • Hardness
  • Microstrain
  • Dislocation density

Cite this

@article{ec73c2e4307748eea41f90cb7d010b2f,
title = "Effect of Laser Shock Peening (LSP) on the Phase Evolution, Residual Stress and Hardness of Hastelloy-X Superalloys",
abstract = "Efforts have been made to understand the effect of laser shock peening (LSP) on the phase, residual stress and hardness of Hastelloy-X superalloys. A 10 J Nd:YAG laser was used for the LSP operation. Following LSP detailed microstructural and phase analysis along with residual stress and hardness studies were undertaken. A parametric window was first established to explore the relationship between LSP process parameters and the respective surface and bulk properties. The effects of an absorptive layer on the properties of the modified layer were also investigated. Qualitative and quantitative information on dislocation density was obtained using X-ray diffraction (XRD) analysis and correlated with the processing parameters. Residual stress developed followingLSP was measured using the XRD technique. An increase in the hardness of the Ni-based superalloys was observed. The residual stress on the surface of the laser shock peened Hastelloy-X superalloy showed a maximum compressive stress of 166 MPa. A detailed microstructure-property relationship was established to understand the mechanism of property enhancement. Further optimization of the LSP process to surface treat the Hastelloy-X superalloys will open up new avenues for the material’s applicability, particularly in the aerospace sector.",
keywords = "Nd:YAG laser, Hastelloy-X, superalloy, Absorptive layer, Laser shock peening (LSP), Residual stresses, Hugoniot elastic limit (HEL), Hardness, Microstrain, Dislocation density",
author = "Subhasisa Nath and Pratik Shukla and Xiaojun Shen and Jonathan Lawrence",
year = "2018",
language = "English",
volume = "39",
pages = "97--112",
journal = "Lasers in Engineering",
issn = "0898-1507",
publisher = "Old City Publishing",
number = "1-2",

}

TY - JOUR

T1 - Effect of Laser Shock Peening (LSP) on the Phase Evolution, Residual Stress and Hardness of Hastelloy-X Superalloys

AU - Nath, Subhasisa

AU - Shukla, Pratik

AU - Shen, Xiaojun

AU - Lawrence, Jonathan

PY - 2018

Y1 - 2018

N2 - Efforts have been made to understand the effect of laser shock peening (LSP) on the phase, residual stress and hardness of Hastelloy-X superalloys. A 10 J Nd:YAG laser was used for the LSP operation. Following LSP detailed microstructural and phase analysis along with residual stress and hardness studies were undertaken. A parametric window was first established to explore the relationship between LSP process parameters and the respective surface and bulk properties. The effects of an absorptive layer on the properties of the modified layer were also investigated. Qualitative and quantitative information on dislocation density was obtained using X-ray diffraction (XRD) analysis and correlated with the processing parameters. Residual stress developed followingLSP was measured using the XRD technique. An increase in the hardness of the Ni-based superalloys was observed. The residual stress on the surface of the laser shock peened Hastelloy-X superalloy showed a maximum compressive stress of 166 MPa. A detailed microstructure-property relationship was established to understand the mechanism of property enhancement. Further optimization of the LSP process to surface treat the Hastelloy-X superalloys will open up new avenues for the material’s applicability, particularly in the aerospace sector.

AB - Efforts have been made to understand the effect of laser shock peening (LSP) on the phase, residual stress and hardness of Hastelloy-X superalloys. A 10 J Nd:YAG laser was used for the LSP operation. Following LSP detailed microstructural and phase analysis along with residual stress and hardness studies were undertaken. A parametric window was first established to explore the relationship between LSP process parameters and the respective surface and bulk properties. The effects of an absorptive layer on the properties of the modified layer were also investigated. Qualitative and quantitative information on dislocation density was obtained using X-ray diffraction (XRD) analysis and correlated with the processing parameters. Residual stress developed followingLSP was measured using the XRD technique. An increase in the hardness of the Ni-based superalloys was observed. The residual stress on the surface of the laser shock peened Hastelloy-X superalloy showed a maximum compressive stress of 166 MPa. A detailed microstructure-property relationship was established to understand the mechanism of property enhancement. Further optimization of the LSP process to surface treat the Hastelloy-X superalloys will open up new avenues for the material’s applicability, particularly in the aerospace sector.

KW - Nd:YAG laser

KW - Hastelloy-X, superalloy

KW - Absorptive layer

KW - Laser shock peening (LSP)

KW - Residual stresses

KW - Hugoniot elastic limit (HEL)

KW - Hardness

KW - Microstrain

KW - Dislocation density

M3 - Article

VL - 39

SP - 97

EP - 112

JO - Lasers in Engineering

JF - Lasers in Engineering

SN - 0898-1507

IS - 1-2

ER -