GCr15钢接触表面塑性形变强化与裂纹萌生机制
PDF下载 (480)朱春莉,赵凤平,苏云帅.GCr15钢接触表面塑性形变强化与裂纹萌生机制[J].宁波大学学报(理工版),2019,32(6):61-66.DOI:
ZHU Chunli,ZHAO Fengping,SU Yunshuai.The mechanism of plastic deformation strengthening and crack initiation on GCr15 steel contact surface[J].Journal of Ningbo University(Natural Science & Engineering Edition),2019,32(6):61-66.DOI:
| Title: | The mechanism of plastic deformation strengthening and crack initiation on GCr15 steel contact surface |
| 作者: | 朱春莉, 赵凤平, 苏云帅 |
| Author(s): | ZHU Chunli, ZHAO Fengping, SU Yunshuai |
| 关键词: | GCr15轴承钢; 滚动接触疲劳; 塑性变形; 晶粒细化; 裂纹 |
| Keywords: | GCr15 bearing steel; rolling contact fatigue; plastic deformation; nanocrystalline; crack |
| 分类号: | TG113 |
| 文献标识码: | A |
| 摘要: | 对轴承钢GCr15在油润滑条件下开展滚动接触疲劳试验, 利用扫描电镜和透射电镜对疲劳样品亚表面微观组织进行观察, 并分析塑性变形层微观结构变化引起的形变强化和裂纹萌生机制. 结果表明: 在摩擦力作用下, 接触表面组织发生塑性流动是由于晶界处的位错滑移使晶粒产生滑移变形, 越接近表面组织滑移变形越严重, 硬度也越高; 塑性变形层内有纳米晶产生, 并有部分碳化物溶解, 无相变发生; 由于在塑性变形层的晶界处产生孔洞而出现层状纤维组织, 孔洞在循环应力的作用下形成裂纹; 塑性变形层的厚度随着接触应力和循环次数的增加而增加. |
| Abstract: | The rolling contact fatigue test of GCr15 bearing steel was carried out under oil lubrication condition. The subsurface microstructure of the failed samples after rolling contact fatigue test was investigated by using scanning electron microscopy and transmission electron microscope, the deformation strengthening and crack initiation mechanism caused by the change of microstructure of plastic deformation layer was also analyzed. The results showed that the plastic flow in the plastic deformation layer is caused by the dislocation slip at the grain boundary resulting in the slip deformation of the grain under the action of friction. The closer to the contact surface, the more serious the slip deformation is and the higher the hardness value is. There are nanocrystals formed and some carbides dissolved in the plastic deformation layer, with no phase transformation appeared. The appearance of layered fibrous structures is resulted from the formation of holes at the grain boundaries in plastic deformation layer, while the holes form cracks under the effect of cyclic stress. The thickness of plastic deformation layer increased with the increase of contact stress and cycle times |
| 参考文献 /References: | [1].Robert E, Robert B, Rainer E. Investigations of bearing failures associated with white etching areas (WEAs) in wind turbine gearboxes[J]. Tribology Transactions, 2013, 56(6):1069-1076. [2].金学松, 张继业, 温泽峰, 等. 轮轨滚动接触疲劳现象分析[J]. 机械强度, 2002, 24(2):250-257. [3].文健, 郭俊, 刘启跃. 轮轨磨损与滚动疲劳裂纹损伤关系及预防研究[J]. 中国表面工程, 2010, 23(3):106- 109. [4].Evans M H, Richardson A D, Wang L, et al. Serial sectioning investigation of butterfly and white etching crack (WEC) formation in wind turbine gearbox bearings[J]. Wear, 2013, 302(1/2):1573-1582. [5].Gould B, Greco A. The influence of sliding and contact severity on the generation of white etching cracks[J]. Tribology Letters, 2015, 60(2):1-13. [6].Grabulov A, Petrov R, Zandbergen H W. EBSD investigation of the crack initiation and TEM/FIB analyses of the microstructural changes around the cracks formed under Rolling Contact Fatigue (RCF)[J]. International Journal of Fatigue, 2010, 32(3):576-583. [7].Hosseini S B, Klement U, Yao Y, et al. Formation mechanisms of white layers induced by hard turning of AISI 52100 steel[J]. Acta Materialia, 2015, 89:258-267. [8].Zhou Y, Peng J F, Luo Z P, et al. Phase and microstructural evolution in white etching layer of a pearlitic steel during rolling-sliding friction[J]. Wear, 2016, 362/363:8-17. [9].杨姗洁, 任瑞铭, 陈春焕, 等. 动车组车轮轮缘塑性变形白层组织分析[J]. 摩擦学学报, 2016, 36(5):622-628. [10].Zhou Y, Peng J F, Wang W J, et al. Slippage effect on rolling contact wear and damage behavior of pearlitic steels[J]. Wear, 2016, 362363:78-86. [11].程晓娟, 王弘, 康国政, 等. 304不锈钢棘轮变形过程中应变诱发马氏体相变行为研究[J]. 金属学报, 2009, 45(7):830-834. [12].Tyfour W R, Beynon J H, Kapoor A. Deterioration of rolling contact fatigue life of pearlitic rail steel due to dry-wet rolling-sliding line contact[J]. Wear, 1996, 197(1): 255-265. [13].Lansler E. Influence of plastic deformations on growth of subsurface rolling contact fatigue cracks in railway wheels[J]. Journal of Rail & Rapid Transit, 2006, 220(4): 461-473. [14].郑逊昭, 夏玉洲. GCr15轴承钢接触疲劳亚表面孔洞的形成[J]. 材料科学与工艺, 1996, 4(3):29-33. [15].Seo J W, Jun H K, Kwon S J, et al. Rolling contact fatigue and wear of two different rail steels under rolling–sliding contact[J]. International Journal of Fatigue, 2016, 83:184-194. [16].Ringsberg J W, Loo-Morrey M, Josefson B L, et al. Prediction of fatigue crack initiation for rolling contact fatigue[J]. International Journal of Fatigue, 2000, 22(3): 205-215. [17].Donzella G, Faccoli M, Mazzu A, et al. Progressive damage assessment in the near-surface layer of railway wheel-rail couple under cyclic contact[J]. Wear, 2011, 271(1/2):408-416. [18].何成刚. 车轮材料摩擦疲劳损伤机理及微观组织演变行为研究[D]. 成都: 西南交通大学, 2018. [19].Ekberg A, ?kesson B, Kabo E. Wheel/rail rolling contact fatigue: Probe, predict, prevent[J]. Wear, 2014, 314(1/2): 2-12. [20].蒋文娟. 钢轨材料对轮轨磨损及微观结构影响的研究[D]. 成都西南交通大学, 2012 |
| 备注/Memo: | 收稿日期: 2019?06?10. 宁波大学学报（理工版）网址 http://journallg.nbu.edu.cn/基金项目: 浙江省自然科学青年基金（LQ17E010001） 宁波大学科研基金（ZX2018000076）: 朱春莉（）, , 河南周口人铜合金焊接zhuchunli@nbu.edu.cn滚动方向10 μm5 μm 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
