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ZHANG Cheng, LU Qinghua, CAI Zunwu, ZHANG Peilei. Microstructure and property of laser welded joint with high frequency micro-vibration process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(2): 86-90. DOI: 10.12073/j.hjxb.2019400048
Citation: ZHANG Cheng, LU Qinghua, CAI Zunwu, ZHANG Peilei. Microstructure and property of laser welded joint with high frequency micro-vibration process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(2): 86-90. DOI: 10.12073/j.hjxb.2019400048
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Microstructure and property of laser welded joint with high frequency micro-vibration process

  • 1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;

  • 2. Shanghai High Strength Laser Intelligent Processing Equipment Key Technology Research and Development Center , Shanghai 201620, China

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  • Received Date: November 10, 2017
    Graphical Abstract
    • Abstract
  • Based on high frequency micro-vibration platform, the 316L stainless steel was welded by laser welding with vibration. The microstructure and property of laser welded joint with high frequency micro-vibration process had been investigated. The results indicate that good welding surface could be got under vibration. No spatters could be found. No collapse and excess weld metal existed. Weld width form uniformly in the back weld. Grain refinement is related to resonant vibration frequency during solidification in the weld. The smallest grain size and the most conspicuous grain refinement were obtained at the resonant frequency of 1 467.5 Hz. In addition, the particles spreaded and dispersed between the austenite grains. The new phase and the large particles were reduced with vibration. With the increase of the vibration frequency, weld microhardness increased, especially with the higher resonance frequency. At the resonant frequency of 1 467.5 Hz, vibration acceleration of 160 m/s2, the average microhardness value of weld is 206 HV, which was increased by 5.6% compared with that with no vibration condition.
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    • References (19)
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