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JOM

, Volume 71, Issue 7, pp 2313–2320 | Cite as

Correlation Between Heat-Treated Microstructure and Mechanical and Fretting Wear Behavior of Electron Beam Freeform-Fabricated Ti6Al4V Alloy

  • Xuewei Tao
  • Zhengjun YaoEmail author
  • Shasha Zhang
  • Zhong Li
  • Yi Xu
Composition-Processing-Microstructure-Property Relationships of Titanium Alloys
  • 71 Downloads

Abstract

Heat treatments have been conducted on electron beam freeform-fabricated (EBF3-ed) Ti6Al4V alloy to obtain desired compressive and antifretting wear performance. The results suggested that the compression and fretting wear properties were significantly affected by the heat-treated microstructure. The subtransus heat treatment used in the present work created a homogeneous and coarser α + β lamellar structure with numerous fine secondary α and nanoscale dispersoids inside. Such structural evolution accounts for the superior compressive property, high hardness, and fretting wear resistance. Additional findings revealed that the fine secondary α and nanoscale dispersoids made a great contribution to the mechanical strengthening and especially passivation of crack propagation. This study shows that the as-received microstructure after EBF3 can be tailored by heat treatment to achieve favorable performance, which is significant for application of Ti6Al4V deposits.

Notes

Acknowledgements

This project was supported by the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX18_0272), Priority Academic Program Development of Jiangsu Higher Education Institutions, Opening Project of Jiangsu Key Laboratory of Advanced Metallic Materials, and Natural Science Foundation for Young Scientists of Jiangsu Province (Grant No. BK20160407). The authors would like to acknowledge Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology for experimental testing.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.School of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjingChina
  2. 2.Key Laboratory of Materials Preparation and Protection for Harsh EnvironmentMinistry of Industry and Information TechnologyNanjingChina
  3. 3.Department of Chemistry and Materials EngineeringChangshu Institute of TechnologyChangshuChina

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