Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue  

作　　者：Yun-Shuai SU Shu-Rong YU Shu-Xin LI Yan-Ni HE 

机构地区：[1]School of PetroChemical Engineering,Lanzhou University of Techno-logy,Lanzhou 730050,China [2]School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China

出　　处：《Frontiers of Mechanical Engineering》2019年第4期434-441,共8页机械工程前沿（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant No.51275225).

摘　　要：Wind turbine gearbox bearings fail with the service life is much shorter than the designed life.Gearbox bearings are subjected to rolling contact fatigue(RCF)and they are observed to fail due to axial cracking,surface flaking,and the formation of white etching areas(WEAs).The current study reviewed these three typical failure modes.The underlying dominant mechanisms were discussed with emphasis on the formation mechanism of WEAs.Although numerous studies have been carried out,the formation of WEAs remains unclear.The prevailing mechanism of the rubbing of crack faces that generates WEAs was questioned by the authors.WEAs were compared with adiabatic shear bands(ASBs)generated in the high strain rate deformation in terms of microstructural compositions,grain refinement,and formation mechanism.Results indicate that a number of similarities exist between them.However,substantial evidence is required to verify whether or not WEAs and ASBs are the same matters.

关 键 词：rolling contact fatigue(RCF) white etching area(WEA) white etching crack(WEC) adiabatic shear band(ASB) 

分 类 号：TG1[金属学及工艺—金属学]