表面微凹坑和纹理方向对界面摩擦的耦合影响
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摘要
选取三种不同纹理的铝合金试样,并在试样上加工不同面积占有率的规则圆形微凹坑,利用自制的摩擦试验装置,在油润滑条件下以不同接触压力进行摩擦试验,试验过程中滑动方向与表面纹理方向的夹角分别为0°、45°、90°。利用非接触式三维轮廓仪测量试验前后试样的三维表面形貌,并选取Sa、Str、Vvv、Vvc等表面表征参数来分析滑动接触界面表面形貌的变化。结果表明:表面纹理方向的差异导致铝合金表面在滑动接触摩擦过程中表现出各向异性,而在其表面加工不同面积占有率的微凹坑,减弱了铝合金表面纹理方向性对界面摩擦的影响,反映出表面微凹坑和纹理对界面摩擦的耦合作用。同时界面摩擦对试件的表面形貌也有明显的影响,Str、Vvv、Vvc在试验后发生了规律性的变化。
The effects of texture direction and surface micro-cavity of aluminum alloy on frictional properties at the sliding contact interface was investigated.Three different surface textures were obtained by cutting,then manufactured micro-cavity with different area densities on the surface.A series of frictional experiments were carried out with different contact pressures under oil lubrication on a tailored friction tester,the angels between the sliding and surface texture directions were as 0°,45°,90°respectively during the experiments.The three dimensional surface topography of samples before and after friction tests were measured with non-contact optical profilometer,and the variations of surface topography at the sliding contact interface were analyzed by choosing such parameters as Sa,Str,Vvvand Vvc.The experimental results show that the aluminum alloy exhibits anisotropy in the processes of sliding contact friction due to different surface texture directions.And the micro-cavity with different area densities on the surface may weaken the effects of texture direction on the contact interface friction,which reflects the coupling effects of surface micro-cavity and texture on the interface friction.The effects of interface friction on surface topography lead to regular changes of the three dimensional surface parameters of S_(tr),V_(vv),V_(vc).
The effects of texture direction and surface micro-cavity of aluminum alloy on frictional properties at the sliding contact interface was investigated.Three different surface textures were obtained by cutting,then manufactured micro-cavity with different area densities on the surface.A series of frictional experiments were carried out with different contact pressures under oil lubrication on a tailored friction tester,the angels between the sliding and surface texture directions were as 0°,45°,90°respectively during the experiments.The three dimensional surface topography of samples before and after friction tests were measured with non-contact optical profilometer,and the variations of surface topography at the sliding contact interface were analyzed by choosing such parameters as Sa,Str,Vvvand Vvc.The experimental results show that the aluminum alloy exhibits anisotropy in the processes of sliding contact friction due to different surface texture directions.And the micro-cavity with different area densities on the surface may weaken the effects of texture direction on the contact interface friction,which reflects the coupling effects of surface micro-cavity and texture on the interface friction.The effects of interface friction on surface topography lead to regular changes of the three dimensional surface parameters of S_(tr),V_(vv),V_(vc).
引文
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[17]李媛,刘小君,张彦,等.面接触条件下织构表面摩擦特性研究[J].机械工程学报,2012,48(19):109-115.LI Yuan,LIU Xiaojun,ZHANG Yan,et al.Frictional Properties of Textured Surfaces under Plane Contact[J].Journal of Mechanical Engineering,2012,48(19):109-115.
[18]李成贵,董申.三维表面微观形貌的表征趋势[J].中国机械工程,2000,11(5):488-492.LI Chenggui,DONG Shen.The Trends of Characterizing 3D Surface Microtopography[J].China Mechanical Engineering,2000,11(5):488-492.
[19]李兵,胡兆稳,王静,等.激光微加工凹坑表面的表征及摩擦特性研究[J].合肥工业大学学报(自然科学版),2011,34(12):1764-1768.LI Bing,HU Zhaowen,WANG Jing,et al.Characterization of Laser-textured Concave Surface and Investigation of Its Tribological Property[J].Journal of Hefei University of Technology(Natural Science Edition),2011,34(12):1764-1768.
[2]RASP W,WICHERN C M.Effects of Surfacetopography Directionality and Lubrication Condition on Frictional Behavior during Plastic Deformation[J].Journal of Materials Processing Technology,2002,125:379-386.
[3]MENEZES P L,KISHOR E,KAILAS S V.Effect of Roughness Parameter and Grinding Angle on Coefficient of Friction when Sliding of Al-Mg Alloy over EN8Steel[J].Journal of Tribology,2006,128(4):697-704.
[4]LIU X,LIEWALD M,BECKER D.Effects of Rolling Direction and Lubricant on Friction in Sheet Metal Forming[J].Journal of Tribology,2009,131(4):042101.
[5]ESMAEILIZADEH R,KHALILI K,MOHAM-MADSADEGHI B,et al.Simulated and Experimental Investigation of Stretch Sheet Forming of Commercial AA1200Aluminum Alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(2):484-490.
[6]肖骥.7475铝合金板材的各向异性疲劳性能研究[D].上海:上海交通大学,2011.XIAO Ji.The Research of the Anisotropic Gatigue Behavior of Aircraft Aluminum Alloy 7475 Plate[D].Shanghai:Shanghai Jiao Tong University,2011.
[7]郭加林,尹志民,商宝川,等.2524铝合金薄板平面各向异性研究[J].航空材料学报,2009,29(1):1-6.GUO Jialin,YIN Zhimin,SHANG Baochuan,et al.Study on Plane Anisotropy of 2524 Aluminum Alloy Sheet[J].Journal of Aeronautical Materials,2009,29(1):1-6.
[8]巫荣海.6061铝合金的热变形行为及各向异性研究[D].长沙:中南大学,2013.WU Ronghai.An Investigation on Hot Deformation Behavior and Anisotropy of 6061 Aluminum Alloy[D].Changsha:Central South University,2013.
[9]历建全,朱华.表面织构及其对摩擦学性能的影响[J].润滑与密封,2009,34(2):94-97.LI Jianquan,ZHU Hua.Surface Texture and Its Effect on Tribological Properties[J].Lubrication Engineering,2009,34(2):94-97.
[10]王洪涛,朱华.圆柱形微凹坑排布形式对织构表面摩擦性能的影响[J].摩擦学学报,2014,34(4):414-419.WANG Hongtao,ZHU Hua.Effects of Cylindrical Micro-pit’s Distribution Form on Tribology Properties of Textured Surface[J].Tribology,2014,34(4):414-419.
[11]COSTA H L,HUTCHINGS I M.Effects of Die Surface Patterning on Lubrication in Strip Drawing[J].Journal of Materials Processing Technology,2009,209(3):1175-1180.
[12]TANG W,ZHOU Y,ZHU H,et al.The Effect of Surface Texturing on Reducing the Friction and Wear of Steel under Lubricated Sliding Contact[J].Applied Surface Science,2013,273:199-204.
[13]SUDEEP U,TANDON N,PANDEY R K.Tribological Studies of Lubricated Laser-textured Point Contacts in Rolling/sliding Reciprocating Motion with Investigations of Wettability and Nanohardness[J].Tribology Transactions,2015,58(4):625-634.
[14]KURNIAWAN R,KO T J.Friction Reduction on Cylindrical Surfaces by Texturing with a Piezoelectric Actuated Tool Holder[J].International Journal of Precision Engineering&Manufacturing,2015,16(5):861-868.
[15]杨本杰,刘小君,董磊,等.表面形貌对滑动接触界面摩擦行为的影响[J].摩擦学学报,2014,34(5):553-560.YANG Benjie,LIU Xiaojun,DONG Lei,et al.Effect of Surface Topography on the Interface Tribological Behavior of Sliding Contact[J].Tribology,2014,34(5):553-560.
[16]李杨,刘小君,王庆生,等.线接触状态下激光加工微造型表面摩擦特性研究[J].摩擦学学报,2013,33(4):349-356.LI Yang,LIU Xiaojun,WANG Qingsheng,et al.Effect of Laser Textured Surfaced on the Frictional Property in Line Contact[J].Tribology,2013,33(4):349-356.
[17]李媛,刘小君,张彦,等.面接触条件下织构表面摩擦特性研究[J].机械工程学报,2012,48(19):109-115.LI Yuan,LIU Xiaojun,ZHANG Yan,et al.Frictional Properties of Textured Surfaces under Plane Contact[J].Journal of Mechanical Engineering,2012,48(19):109-115.
[18]李成贵,董申.三维表面微观形貌的表征趋势[J].中国机械工程,2000,11(5):488-492.LI Chenggui,DONG Shen.The Trends of Characterizing 3D Surface Microtopography[J].China Mechanical Engineering,2000,11(5):488-492.
[19]李兵,胡兆稳,王静,等.激光微加工凹坑表面的表征及摩擦特性研究[J].合肥工业大学学报(自然科学版),2011,34(12):1764-1768.LI Bing,HU Zhaowen,WANG Jing,et al.Characterization of Laser-textured Concave Surface and Investigation of Its Tribological Property[J].Journal of Hefei University of Technology(Natural Science Edition),2011,34(12):1764-1768.