Abstract
This research study presents a novel test fixture for tribocorrosion investigation in the internal dovetail slot of Ti6Al4V specimens. The experiments were carried out at room temperature under cyclic loads of 5 kN and 7.5 kN (R = 0.1) and a constant frequency of 20 Hz using a universal testing machine. Three environments were applied: dry, 3.5 % NaCl and phosphate buffered saline (PBS). Microscopic investigations revealed the presence of oxygen, chlorine and sodium in 3.5 % NaCl environment while phosphorous, chlorine, potassium, sodium and oxygen were observed in PBS environment in addition to the intense coloration, depicting pitting corrosion. Early initiation of the four edge cracks in shear mode, presence of a few minor cracks and longer crack propagations till crack arrest, was observed in corrosive environments. Numerical simulation using finite element analysis software; ABAQUS successfully predicted the mode of crack initiation, location of edge cracks and crack arrest phenomenon.
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Abbreviations
- F N :
-
Normal component of the contact force
- L :
-
Contact length
- E 1 :
-
Modulus of elasticity of Ti6Al4V
- ϑ 1 :
-
Poisson’s ratio of Ti6Al4V
- R 1 :
-
Radius of Ti6Al4V specimen
- E 2 :
-
Modulus of elasticity of carbide
- ϑ 2 :
-
Poisson’s ratio of carbide
- R 2 :
-
Radius of carbide rod
- P h :
-
Hertzian pressure
- b :
-
Contact width
- K II :
-
Stress intensity factor (mode-II)
- J :
-
J-integral
- τ max :
-
Maximum shear stress
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Acknowledgments
The research facilities provided at Fracture Mechanics and Fatigue Laboratory, Department of Mechanical Engineering, UET Taxila, Punjab, Pakistan are greatly acknowledged. We also acknowledge the collaborations with Dr. Mohammad Mujahid, Dr. Mushtaq Khan, Dr. Aneela Wakeel and Engr. Faisal Qayyum during this research work.
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Zeeshan Anjum completed his B.Sc. in Mechanical Engineering from UAJK Muzaffarabad in 2011. He passed his M.Sc. in Applied Mechanics and Design from UET Taxila, Pakistan in 2014 and he is currently doing his Ph.D. from the same university.
Sayyid Masoodur Rahman Shah (Masood Shah) is the Ph.D. supervisor of Zeeshan Anjum. He completed his B.Sc. in Mechanical Engineering from UET Taxila, Pakistan, M.Sc. and Ph.D. in Mechanical Engineering from Ecole des Mines d’Albi — Carmaux — ALBI — France.
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Anjum, Z., Shah, M. Prediction of crack initiation and propagation during fretting corrosion of novel Ti6Al4V specimens in saline and physiological environments. J Mech Sci Technol 37, 119–126 (2023). https://doi.org/10.1007/s12206-022-1212-5
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DOI: https://doi.org/10.1007/s12206-022-1212-5