武汉工程职业技术学院学报2016，Vol.28Issue(4)：9-13,5.
20kHz和140Hz下高强汽车弹簧用钢的疲劳性能
Fatigue Behavior of Automotive Spring Steel at 20kHz and 140Hz
摘要
Abstract
The fatigue property of a high strength automotive spring steel was investigated via the con‐ventional fatigue testing and ultrasonic fatigue testing .The fatigue fracture surfaces are observed using SEM respectively .The results show that the characteristic of fracture surface of the specimen at 20kHz and 140Hz are similar ,i .e .for the specimen of fatigue lifetime within 106 ,the fracture are prone to initi‐ate from the surface .However for high cycle fracture(HCF) and very high cycle fracture(VHCF) ,the fracture are prone to initiate from specimen subsurface or internal inhomogeneities with a distinct feature of so‐called“fish‐eye” .For the VHCF ,there is a characteristic “granular‐bright‐facet(GBF)” area around the origination .Step‐wise S/N curve with a horizontal part was observed for the spring steel ,and the S/N curve character is related to the size of the inclusion .There is obvious difference of fatigue lifetime at 20kHz and 140Hz .i .e .the frequency effect of spring steel in the paper is obvious .关键词
高强弹簧钢/超高周疲劳/鱼眼/粒状亮面/频率效应Key words
high strength spring steel/very high cycle fatigue/fish-eye/granular bright facet/fre-quency effect分类
矿业与冶金引用本文复制引用
彭文杰,张彦文..20kHz和140Hz下高强汽车弹簧用钢的疲劳性能[J].武汉工程职业技术学院学报,2016,28(4):9-13,5.
