Počet záznamů: 1  

Surface integrity and residual stress analysis of pulsed water jet peened stainless steel surfaces

  1. 1.
    0504914 - ÚGN 2020 RIV GB eng J - Článek v odborném periodiku
    Srivastava, M. - Hloch, Sergej - Gubeljak, N. - Milkovic, M. - Chattopadhyaya, S. - Klich, Jiří
    Surface integrity and residual stress analysis of pulsed water jet peened stainless steel surfaces.
    Measurement. Roč. 143, September 2019 (2019), s. 81-92. ISSN 0263-2241. E-ISSN 1873-412X
    Grant CEP: GA MŠMT(CZ) LO1406
    Institucionální podpora: RVO:68145535
    Klíčová slova: pulsating water jet * residual stress * micro-hardness * peening * surface roughness
    Obor OECD: Mechanical engineering
    Impakt faktor: 3.364, rok: 2019
    Způsob publikování: Omezený přístup
    https://www.sciencedirect.com/science/article/pii/S0263224119304087?via%3Dihub

    Enhancement of the life of the engineering components is essential from the perspective of its performance,
    therefore, it is necessary to eliminate the negative effects that attenuates the life of these components.
    Numerous surface treatment methods are used at present out of which water jet peening process
    have been stated to overcome the shortcoming reported in other surface treatment methods like surface
    defects caused by the embedment of particles during shot peening, thermal effects caused by laser shock
    peening. It has been reported in studies that the technological modification of water jet technology, ultrasonically
    generated pulsed water jet (PWJ) can be used for the peening application but still the detailed
    study of parametric variations for the peening process is not clearly explained. The present work aims at
    reporting the effect of variation of parameters: jet pressure (40 MPa to 100 MPa), traverse speed of the
    nozzle (5 mm/s to 25 mm/s) and standoff distance (15 mmto 31 mm) during the ultrasonically generated
    PWJ peening process. The peened surface was quantified in terms of surface residual stress measurements,
    micro hardness and surface roughness measurements. The results indicate that the variations
    in the parameters shows significant changes in the surface residual stress enhancement and strengthening
    process. The lower pressure (40 MPa), lower traverse speed (5 mm/s) and higher standoff distance
    (31 mm) showed the maximum improvement in the surface residual stress (up to 540 MPa) and
    micro-hardness (up to 570 HV). The impact of the repeated pulses causes plastic deformation on the surface
    and sub-surface layers which results into the change in the microstructures of the affected area. The
    microstructural examination through field emission scanning electron microscopy showed variations in
    these deformations under different parametric conditions. This study can give better understanding for
    the proper selection of the peening parameters for practical applications using ultrasonically generated
    pulsed water jet technology.
    Trvalý link: http://hdl.handle.net/11104/0296451

     
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