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Laser gas-assisted processing of carbon coated and TiC embedded Ti-6Al-4V alloy surface

机译：激光气体辅助处理的碳涂层和TiC嵌入的Ti-6Al-4V合金表面

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摘要

Laser gas-assisted treatment of Ti-6Al-4V alloy surface is carried out. The alloy surface is initially coated by a carbon layer, in which the TiC particles are embedded prior to laser processing of the surface. The carbon coating with the presence of TiC particles on the workpiece surface is expected to result in carbonitride compound in the surface vicinity after the laser treatment process. Optical and scanning electron microscopes are used to examine the morphological and the metallurgical changes in the laser treated layer. The residual stress formed in the surface region after the laser treatment process is critical for the practical applications of the resulting surface. Therefore, the residual stress formed in the laser treated region is predicted from the analytically equation. The X-ray diffraction technique is incorporated to obtain the residual stress formed in the surface region. It is found that the residual stress predicted agrees with the X-ray diffraction data. The dense structures consisting of TiC_xN_(1-x), TiN_x, Ti_2N, and TiC compounds are formed in the surface region of the treated layer. This, in turn, significantly increases the microhardness at the surface.
机译：对Ti-6Al-4V合金表面进行了激光气体辅助处理。合金表面最初被碳层覆盖，在表面进行激光加工之前，TiC颗粒被嵌入其中。预期在工件表面上存在TiC颗粒的碳涂层会在激光处理过程之后在表面附近产生碳氮化物化合物。光学和扫描电子显微镜用于检查激光处理层的形貌和冶金学变化。激光处理过程后在表面区域中形成的残余应力对于所得表面的实际应用至关重要。因此，根据解析方程预测在激光处理区域中形成的残余应力。结合X射线衍射技术以获得在表面区域中形成的残余应力。发现预测的残余应力与X射线衍射数据一致。在处理层的表面区域中形成由TiC_xN_（1-x），TiN_x，Ti_2N和TiC化合物组成的致密结构。反过来，这大大增加了表面的显微硬度。

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  • 来源
    《Applied Surface Science》 |2010年第2期|p.531-537|共7页
  • 作者

    B.S. Yilbas; S. Akhtar; B.J. Abdul Aleem; C. Karatas;

  • 作者单位

    Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Saudi Arabia;

    Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Saudi Arabia;

    Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Saudi Arabia;

    Faculty of Engineering, Hacettepe University, Turkey;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    user; nitriding; residual stress; Ti alloy;

    机译：用户;氮化残余应力钛合金;

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