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Journal of Failure Analysis and Prevention

, Volume 14, Issue 1, pp 102–112 | Cite as

Surface Integrity and Fatigue Behavior for High-Speed Milling Ti–10V–2Fe–3Al Titanium Alloy

  • C. -F. Yao
  • L. Tan
  • J. -X. Ren
  • Q. Lin
  • Y. -S. Liang
Technical Article---Peer-Reviewed

Abstract

Influence of cutting parameters on surface integrity when milling Ti–10V–2Fe–3Al is investigated based on high-speed cutting experiments. Surface integrity measurements, fatigue fractography analysis, and fatigue life tests are conducted to reveal the effect of surface integrity on crack initiation and fatigue life. The results show that under given experiment conditions, surface roughness decreases linearly when increasing cutting speed or decreasing feed per tooth. The latter has a greater impact on surface roughness than the former. Compressive stress can be detected on all machined surfaces. With the increase of feed per tooth or cutting speed, respectively, residual stress presents a linear increase. Cutting parameters have no significant impact on micro-hardness. When the surface roughness ranges from 0.5 to 1.0 μm, the effect of surface residual stress on fatigue life is more than that of surface roughness. When the surface residual compressive stress increases, the fatigue life improves significantly. Compared with 60 m/min, when cutting speed is 100 or 140 m/min, the surface roughness decreases, the surface residual compressive stress increases, and the fatigue life improves by 124 and 59%, respectively. Under a tensile load, fatigue crack on machined surface of Ti–10V–2Fe–3Al titanium alloy originates at the cross-edge of the specimen surface. With the increase of surface roughness, the area ratio of fatigue crack propagation zone, and fatigue fracture zone decreases.

Keywords

Ti–10V–2Fe–3Al titanium alloy High-speed milling Surface integrity Fatigue life Fatigue fracture 

Notes

Acknowledgements

The authors wish to thank the support of the National Natural Science Foundation of China (Grant Nos.50975237, 51005184 and 51375393), National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant No. 2013ZX04011031), and the Aeronautical Science Foundation of China (2013ZE53060).

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Copyright information

© ASM International 2013

Authors and Affiliations

  • C. -F. Yao
    • 1
  • L. Tan
    • 1
  • J. -X. Ren
    • 1
  • Q. Lin
    • 1
  • Y. -S. Liang
    • 1
  1. 1.The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of EducationNorthwestern Polytechnical UniversityXi’anPeople’s Republic of China

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