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超声喷丸对工业纯锆拉拉疲劳性能的影响研究
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西安建筑科技大学

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国家自然科学基金资助(项目号51674187)


Effect of ultrasonic peening on tensile-tensile fatigue properties of industrial pure zirconium
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Xi`an University of Architecture and Technology

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    摘要:

    采用超声喷丸(USSP)对工业纯锆进行处理,就其拉拉疲劳性能展开研究,并利用光学显微镜(OM)和显微硬度计分别对试样的微观组织和由表层到基体的硬度分布进行表征;利用X射线衍射仪(XRD)分析其表层晶粒尺寸、微观畸变以及残余应力。结果表明:USSP处理后,其晶粒尺寸细化到纳米级别,表层残余压应力、表面粗糙度、硬度随着处理时间的增加而增加;原始工业纯锆的疲劳极限为195MPa,USSP处理可显著提高其疲劳极限,USSP处理45min工业纯锆的疲劳极限达到220MPa,较原始工业纯锆提高11.2%;疲劳加载过程中的应力越低,USSP处理对疲劳寿命的提高越明显。

    Abstract:

    Ultrasonic shot peening (USSP) was used to treat industrial pure zirconium and its tension-tension fatigue properties were studied. The microstructure and surface hardness of the samples were characterized by optical microscopy (OM) and microhardness tester. The grain size, micro distortion and residual stress of sample surface were analyzed by X ray diffractometer (XRD). The results show that:After USSP treatment, the grain size is refined to the nano scale, and the residual compressive stress, surface roughness and hardness of the surface increase with USSP time. The fatigue limit of original industry pure zirconium is 195MPa, USSP treatment can significantly increase the fatigue limit and the maximum fatigue limit of USSP treated 45min is maximum, reaching 220MPa, which is 11.2% higher than original industrial pure zirconium. The lower the maximum loading stress during fatigue loading is, the increase of fatigue life by USSP treatment is more obvious.

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张聪惠,杨军,宋国栋,任海涛.超声喷丸对工业纯锆拉拉疲劳性能的影响研究[J].稀有金属材料与工程,2019,48(6):1954~1960.[zhangconghui, yangjun, songguodong, renhaitao. Effect of ultrasonic peening on tensile-tensile fatigue properties of industrial pure zirconium[J]. Rare Metal Materials and Engineering,2019,48(6):1954~1960.]
DOI:10.12442/j. issn.1002-185X.20180449

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  • 收稿日期:2018-05-03
  • 最后修改日期:2018-06-11
  • 录用日期:2018-07-27
  • 在线发布日期: 2019-07-26
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