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

    1 Citation (Scopus)
    122 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",
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    }

    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

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    DO - 10.2351/1.5039858

    M3 - Article

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