Volume 8, Issue 1 (January 2011)

    Influence of Laser Shock Processing on Surface Microstructures and Properties of Carbon Steel

    (Received 26 May 2010; accepted 9 October 2010)

    Published Online: 2010

    CODEN: JAIOAD

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    Abstract

    In order to understand the correlations between the laser shock processing and materials’ response, an as annealed plain carbon steel 45 (equivalent to AISI 1045) was investigated by means of a Nd:glass laser setup with 1054 nm wavelength and 20 ns short pulse. The microstructure evolution was analyzed with optical microscope, scanning electron microscope, etc. The experimental results indicate that the strengthening effects can be obtained under the used confinement conditions and the ultra-high strain rate of laser shock. After laser shocking, the cementite in pearlite crashes the subject to their orientations, and the pro-eutectoid ferrite produces a great number of dislocation etched pits and lens-like twins. The hardness of pearlite and pro-eutectoid ferrite increases by 70 and 55 Hv, respectively, and the residual compressive stress of the steel reaches 425 MPa on the shocked spot.


    Author Information:

    Luo, Xinmin
    Jiangsu Univ., Zhenjiang, Jiangsu

    Yang, Kun
    Jiangsu Univ., Zhenjiang, Jiangsu

    Yuan, Chunzhi
    Jiangsu Univ., Zhenjiang, Jiangsu

    Zhang, Jingwen
    Jiangsu Univ., Zhenjiang, Jiangsu

    Ma, Hui
    Jiangsu Univ., Zhenjiang, Jiangsu

    Zhang, Yongkang
    Jiangsu Univ., Zhenjiang, Jiangsu


    Stock #: JAI103188

    ISSN: 1546-962X

    DOI: 10.1520/JAI103188

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    Author
    Title Influence of Laser Shock Processing on Surface Microstructures and Properties of Carbon Steel
    Symposium , 0000-00-00
    Committee A01