Residual stresses in Stellite 6 layers cladded on AISI 420 steel plates with a Nd:YAG laser

Wei Ya (Corresponding Author), Belavendram Pathiraj

Research output: Contribution to journalArticleAcademicpeer-review

99 Downloads (Pure)

Abstract

Clad tracks/layers with good geometry, desirable dilution, and hardness can be produced using optimal process parameters. However, cracking and deformation can occur in the laser cladded products. The tensile residual stress is mainly responsible for the failure of the cladded products. Therefore, different residual stresses’ control strategies during laser cladding were investigated, such as preheating the substrate, using an intermediate layer, and using different energy inputs. The residual stresses in clad layers were measured with layer removal and hole drilling techniques. The depth residual stress distributions obtained from both techniques show a good agreement. The residual stresses acting along the cladding direction σx and the maximum residual stresses within the clad layer were analyzed. The cooling rate and thermal gradient were simulated from our previously developed 2D thermal model. The relationships among the cooling rates, thermal gradients, maximum residual stresses, and absorbed energy were investigated and the results are discussed. Thermal gradients, cooling rates, and the maximum residual stresses decrease with energy input. The decay factors between maximum residual stress and absorbed energy and between the cooling rate and absorbed energy are close to each other indicating that a correlation between the maximum residual stress and cooling rate exists. An empirical relation is used to describe such a correlation.
Original languageEnglish
Article number032007
Number of pages14
JournalJournal of laser applications
Volume30
Issue number3
DOIs
Publication statusPublished - 3 Jul 2018

Fingerprint

Stellite (trademark)
Stellite
Steel
residual stress
YAG lasers
Residual stresses
steels
Lasers
Cooling
cooling
Thermal gradients
gradients
energy
Laser cladding
Preheating
products
tensile stress
drilling
Tensile stress
stress distribution

Keywords

  • Laser cladding
  • Layer removal
  • Hole drilling
  • Cooling rate
  • Thermal gradients
  • Residual

Cite this

@article{354693e675784f998135ca8f03f477e9,
title = "Residual stresses in Stellite 6 layers cladded on AISI 420 steel plates with a Nd:YAG laser",
abstract = "Clad tracks/layers with good geometry, desirable dilution, and hardness can be produced using optimal process parameters. However, cracking and deformation can occur in the laser cladded products. The tensile residual stress is mainly responsible for the failure of the cladded products. Therefore, different residual stresses’ control strategies during laser cladding were investigated, such as preheating the substrate, using an intermediate layer, and using different energy inputs. The residual stresses in clad layers were measured with layer removal and hole drilling techniques. The depth residual stress distributions obtained from both techniques show a good agreement. The residual stresses acting along the cladding direction σx and the maximum residual stresses within the clad layer were analyzed. The cooling rate and thermal gradient were simulated from our previously developed 2D thermal model. The relationships among the cooling rates, thermal gradients, maximum residual stresses, and absorbed energy were investigated and the results are discussed. Thermal gradients, cooling rates, and the maximum residual stresses decrease with energy input. The decay factors between maximum residual stress and absorbed energy and between the cooling rate and absorbed energy are close to each other indicating that a correlation between the maximum residual stress and cooling rate exists. An empirical relation is used to describe such a correlation.",
keywords = "Laser cladding, Layer removal, Hole drilling, Cooling rate, Thermal gradients, Residual",
author = "Wei Ya and Belavendram Pathiraj",
year = "2018",
month = "7",
day = "3",
doi = "10.2351/1.5039858",
language = "English",
volume = "30",
journal = "Journal of laser applications",
issn = "1042-346X",
publisher = "Laser Institute of America",
number = "3",

}

Residual stresses in Stellite 6 layers cladded on AISI 420 steel plates with a Nd:YAG laser. / Ya, Wei (Corresponding Author); Pathiraj, Belavendram .

In: Journal of laser applications, Vol. 30, No. 3, 032007, 03.07.2018.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Residual stresses in Stellite 6 layers cladded on AISI 420 steel plates with a Nd:YAG laser

AU - Ya, Wei

AU - Pathiraj, Belavendram

PY - 2018/7/3

Y1 - 2018/7/3

N2 - Clad tracks/layers with good geometry, desirable dilution, and hardness can be produced using optimal process parameters. However, cracking and deformation can occur in the laser cladded products. The tensile residual stress is mainly responsible for the failure of the cladded products. Therefore, different residual stresses’ control strategies during laser cladding were investigated, such as preheating the substrate, using an intermediate layer, and using different energy inputs. The residual stresses in clad layers were measured with layer removal and hole drilling techniques. The depth residual stress distributions obtained from both techniques show a good agreement. The residual stresses acting along the cladding direction σx and the maximum residual stresses within the clad layer were analyzed. The cooling rate and thermal gradient were simulated from our previously developed 2D thermal model. The relationships among the cooling rates, thermal gradients, maximum residual stresses, and absorbed energy were investigated and the results are discussed. Thermal gradients, cooling rates, and the maximum residual stresses decrease with energy input. The decay factors between maximum residual stress and absorbed energy and between the cooling rate and absorbed energy are close to each other indicating that a correlation between the maximum residual stress and cooling rate exists. An empirical relation is used to describe such a correlation.

AB - Clad tracks/layers with good geometry, desirable dilution, and hardness can be produced using optimal process parameters. However, cracking and deformation can occur in the laser cladded products. The tensile residual stress is mainly responsible for the failure of the cladded products. Therefore, different residual stresses’ control strategies during laser cladding were investigated, such as preheating the substrate, using an intermediate layer, and using different energy inputs. The residual stresses in clad layers were measured with layer removal and hole drilling techniques. The depth residual stress distributions obtained from both techniques show a good agreement. The residual stresses acting along the cladding direction σx and the maximum residual stresses within the clad layer were analyzed. The cooling rate and thermal gradient were simulated from our previously developed 2D thermal model. The relationships among the cooling rates, thermal gradients, maximum residual stresses, and absorbed energy were investigated and the results are discussed. Thermal gradients, cooling rates, and the maximum residual stresses decrease with energy input. The decay factors between maximum residual stress and absorbed energy and between the cooling rate and absorbed energy are close to each other indicating that a correlation between the maximum residual stress and cooling rate exists. An empirical relation is used to describe such a correlation.

KW - Laser cladding

KW - Layer removal

KW - Hole drilling

KW - Cooling rate

KW - Thermal gradients

KW - Residual

U2 - 10.2351/1.5039858

DO - 10.2351/1.5039858

M3 - Article

VL - 30

JO - Journal of laser applications

JF - Journal of laser applications

SN - 1042-346X

IS - 3

M1 - 032007

ER -