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首页> 外文期刊>Materials Science and Engineering >Studies towards development of laser peening technology for martensitic stainless steel and titanium alloys for steam turbine applications
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Studies towards development of laser peening technology for martensitic stainless steel and titanium alloys for steam turbine applications

机译：汽轮机应用马氏体不锈钢和钛合金激光喷丸技术发展的研究

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摘要

Fatigue is a major life limiting factor affecting service life of low pressure steam turbine blades which, depending on turbine rating, are generally made of martensitic stainless steel or Ti6A14V alloy. The results of the present study has demonstrated that with respect to conventional shot peening, laser peening brought more than two times longer mean fatigue life of Ti6A14V alloy. Enhanced fatigue performance of laser peened specimens was attributed to the deeper peened layer and smoother finish. In the case of DIN X20Cr13 stainless steel, laser peening did not register significant improvement in fatigue resistance over shot peening. At maximum test stress of 550 MPa, DIN X20Cr13 stainless steel specimens, shot peened and laser peened specimens exhibited comparable fatigue lives. However, at lower magnitude of maximum test stress of 400 MPa, laser peened specimens displayed about 30% longer fatigue lives than their shot peened counterparts. Similar fatigue lives of shot peened and laser peened specimens of DIN X20Cr13 stainless steel specimens is attributed to comparable magnitude of surface residual stress and case depth produced by the two peening treatments.
机译：疲劳是影响低压蒸汽涡轮机叶片使用寿命的主要寿命限制因素，视涡轮机额定值而定，该叶片通常由马氏体不锈钢或Ti6A14V合金制成。本研究的结果表明，相对于传统的喷丸处理，激光喷丸使Ti6A14V合金的平均疲劳寿命延长了两倍以上。激光喷丸试样的疲劳性能增强归因于更深的喷丸层和更光滑的表面。对于DIN X20Cr13不锈钢，与喷丸相比，激光喷丸的抗疲劳性没有明显改善。在最大测试应力为550 MPa时，DIN X20Cr13不锈钢试样，喷丸处理和激光喷丸处理的样品表现出相当的疲劳寿命。但是，在最大测试应力为400 MPa时，激光喷丸试样的疲劳寿命比喷丸试样长30％。 DIN X20Cr13不锈钢试样的喷丸和激光喷丸试样具有相似的疲劳寿命，这归因于两种喷丸处理产生的表面残余应力和表壳深度相当。

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  • 来源
    《Materials Science and Engineering》 |2013年第10期|352-358|共7页
  • 作者

    B.K. Pant; R. Sundar; Harish Kumar; R. Kaul; A.H.V. Pavan; K. Ranganathan; K.S. Bindra; S.M. Oak; L.M. Kukreja; Raghu V. Prakash; M. Kamaraj;

  • 作者单位

    Bharat Heavy Electricals Ltd., Corporate R & D, Vikasnagar, Hyderabad 500093, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Bharat Heavy Electricals Ltd., Corporate R & D, Vikasnagar, Hyderabad 500093, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, India;

    Department of Mechanical Engineering, IIT Madras, Chennai 600036, India;

    Department of Metallurgical and Materials Engineering, IIT Madras, Chennai 600036, India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laser peening; Shot peening; Low pressure steam turbine blades; Surface treatment;

    机译：激光喷丸;喷丸;低压汽轮机叶片;表面处理;

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