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首页> 外文期刊>Journal of Materials Research >Enhanced fatigue performance and surface mechanical properties of AISI 304 stainless steel induced by electropulsing-assisted ultrasonic surface rolling process
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Enhanced fatigue performance and surface mechanical properties of AISI 304 stainless steel induced by electropulsing-assisted ultrasonic surface rolling process

机译：电脉冲辅助超声表面轧制工艺增强了AISI 304不锈钢的疲劳性能和表面力学性能

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摘要

The evolution of fatigue performance and surface mechanical properties of AISI 304 stainless steel induced by the electropulsing-assisted ultrasonic surface rolling process (EP-USRP) was systematically investigated by integrating instrumented indentation, scanning electron microscopy with electron backscatter diffraction, and transmission electron microscopy. The results indicate that higher hardness, greater strength, finer ultra-refined grains, and higher residual compressive stress are formed within the strengthened layer compared with the original ultrasonic surface rolling process (USRP). EP-USRP with the optimized experimental parameters can produce a higher average rotating bending fatigue strength for AISI 304 stainless steel than USRP. Anomalously and noteworthily, all fatigue specimens treated by EP-USRP showed an incomplete fracture, revealing a higher reservation of safety in practical engineering applications. The further modified structure strengthening and stress strengthening induced by EP-USRP are likely the primary intrinsic reasons for the observed phenomena. Furthermore, the influence mechanism of EP-USRP was discussed scrupulously.
机译：通过将仪器压痕，扫描电子显微镜与电子反向散射衍射以及透射电子显微镜相结合，系统地研究了电脉冲辅助超声表面轧制工艺（EP-USRP）引起的AISI 304不锈钢的疲劳性能和表面力学性能的演变。结果表明，与原始超声表面轧制工艺（USRP）相比，强化层内形成了更高的硬度，更高的强度，更细的超细晶粒和更高的残余压应力。具有优化实验参数的EP-USRP可以比AIRP产生更高的AISI 304不锈钢平均旋转弯曲疲劳强度。异常且值得注意的是，EP-USRP处理的所有疲劳试样均显示出不完全断裂，表明在实际工程应用中具有更高的安全性。 EP-USRP引起的进一步改进的结构加强和应力加强可能是观察到现象的主要内在原因。进而，对EP-USRP的影响机理进行了严格讨论。

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  • 来源
    《Journal of Materials Research》 |2018年第22期|3827-3840|共14页
  • 作者

    Wang Hai-bo; Yang Xin-hua; Li He; Song Guo-lin; Tang Guo-yi;

  • 作者单位

    Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China;

    Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China;

    Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China;

    Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China;

    Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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