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超聲噴丸對工業(yè)純鋯拉拉疲勞性能的影響研究
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西安建筑科技大學(xué)

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國家自然科學(xué)基金資助(項目號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:

    采用超聲噴丸(USSP)對工業(yè)純鋯進(jìn)行處理,就其拉拉疲勞性能展開研究,并利用光學(xué)顯微鏡(OM)和顯微硬度計分別對試樣的微觀組織和由表層到基體的硬度分布進(jìn)行表征；利用X射線衍射儀(XRD)分析其表層晶粒尺寸、微觀畸變以及殘余應(yīng)力。結(jié)果表明：USSP處理后,其晶粒尺寸細(xì)化到納米級別,表層殘余壓應(yīng)力、表面粗糙度、硬度隨著處理時間的增加而增加；原始工業(yè)純鋯的疲勞極限為195MPa,USSP處理可顯著提高其疲勞極限,USSP處理45min工業(yè)純鋯的疲勞極限達(dá)到220MPa,較原始工業(yè)純鋯提高11.2%；疲勞加載過程中的應(yīng)力越低,USSP處理對疲勞壽命的提高越明顯。

    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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張聰惠,楊軍,宋國棟,任海濤.超聲噴丸對工業(yè)純鋯拉拉疲勞性能的影響研究[J].稀有金屬材料與工程,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
  • 錄用日期:2018-07-27
  • 在線發(fā)布日期: 2019-07-26
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