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Microstructure and mechanical properties of laser-welded joints of TWIP and TRIP steels

机译：TWIP和TRIP钢的激光焊接接头的组织和力学性能

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摘要

With the aim of investigating a laser-welded dissimilar joint of TWIP and TRIP steel sheets, the microstructure was characterized by means of OM, SEM, and EBSD to differentiate the fusion zone, heat-affected zone, and the base material. OIM was used to differentiate between ferritic, bainitic, and martensitic structures. Compositions were measured by means of optical emission spectrometry and EDX to evaluate the effect of manganese segregation. Microhardness measurements and tensile tests were performed to evaluate the mechanical properties of the joint. Residual stresses and XRD phase quantification were used to characterize the weld. Grain coarsening and martensitic areas were found in the fusion zone, and they had significant effects on the mechanical properties of the weld. The heat-affected zone of the TRIP steel and the corresponding base material showed considerable differences in the microstructure and properties.
机译：为了研究TWIP和TRIP钢板的激光焊接异种接头，通过OM，SEM和EBSD对显微组织进行了表征，以区分熔合区，热影响区和基材。 OIM用于区分铁素体，贝氏体和马氏体结构。通过光发射光谱法和EDX测量组成，以评估锰偏析的影响。进行了显微硬度测量和拉伸试验，以评估接头的机械性能。残余应力和XRD相量化用于表征焊缝。在熔合区发现了晶粒粗化和马氏体区，它们对焊缝的机械性能产生重大影响。 TRIP钢和相应基材的热影响区在微观组织和性能方面显示出相当大的差异。

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  • 来源
    《Materials Science and Engineering》 |2010年第8期|2071-2078|共8页
  • 作者

    L. Mujica; S. Weber; H. Pinto; C. Thomy; F. Vollertsen;

  • 作者单位

    Lehrstuhl Werkstofftechnik, Ruhr-Universitaet Bochum, D-44780 Bochum, Germany Max Planck Institut fuer Eisenforschung, D-40237 Duesseldorf, Germany;

    Lehrstuhl Werkstofftechnik, Ruhr-Universitaet Bochum, D-44780 Bochum, Germany Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH, D-14109 Berlin, Germany;

    Max Planck Institut fuer Eisenforschung, D-40237 Duesseldorf, Germany Departamento de Engenharia de Materials, Aeronautica e Automobilistica, Universidade de Sao Paulo, CEP 13566-590 Sao Carlos, Brazil;

    BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH, D-28359 Bremen, Germany;

    BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH, D-28359 Bremen, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    TWIP steel; TRIP steel; laser welding; EBSD;

    机译：TWIP钢;TRIP钢;激光焊接欧洲可持续发展委员会;

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