@article{26,
  author = {Zhongqiang Liu and Zhen Wang and Chaofeng Gao and Ruiping Liu and Xiao Liu and Joseph Sanderson},
  title = {Enhanced rolling contact fatigue behavior of selective electron beam melted Ti6Al4V using the ultrasonic surface rolling process},
  abstract = {<p>This paper investigates the influence of building directions and&nbsp;<a href="https://www.sciencedirect.com/topics/physics-and-astronomy/ultrasonics">ultrasonic</a>&nbsp;surface rolling processing (USRP) on&nbsp;<a href="https://www.sciencedirect.com/topics/physics-and-astronomy/rolling-contact-fatigue">rolling contact fatigue</a>&nbsp;(RCF) performances of selective&nbsp;<a href="https://www.sciencedirect.com/topics/physics-and-astronomy/electron-beam">electron beam</a>&nbsp;melted Ti6Al4V. Results show the RCF performance in the xoz direction is 54% higher than that of the xoy direction due to the poor&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/crack-propagation">crack propagation</a>&nbsp;resistance of the prior-β&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/columnar-grain">columnar grain</a>&nbsp;boundary α layer. The USRP treated samples show ∼ 30% longer&nbsp;<a href="https://www.sciencedirect.com/topics/materials-science/fatigue-of-materials">RCF life</a>&nbsp;than that of untreated samples. The increased RCF performance is attributed to large work hardening, surface nano-crystallization, surface&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/compressive-residual-stress">residual compressive stress</a>, and the changed&nbsp;<a href="https://www.sciencedirect.com/topics/materials-science/lubrication">lubrication</a>&nbsp;condition from&nbsp;<a href="https://www.sciencedirect.com/topics/materials-science/boundary-lubrication">boundary lubrication</a>&nbsp;to&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/mixed-lubrication">mixed lubrication</a>, which suppresses crack initiation and propagation.</p>
},
  year = {2022},
  journal = {MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING},
  volume = {833},
  chapter = {142352},
  month = { 2022/3/17},
  url = {https://www.sciencedirect.com/science/article/pii/S0921509321016166},
  doi = {10.1016/j.msea.2021.142352},
}