Article

Journal of Materials Engineering and Performance

, Volume 20, Issue 7, pp 1206-1218

Innovative Manufacturing Process for Defect Free, Affordable, High Pressure, Thin Walled, Hydraulic Tubing

  • W. MirandaAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , G. TakiguchiAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , T. ShimabukuroAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , L. McLennanAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , C. AgajanianAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , L. QuinteroAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , D. MismarAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , J. AbdullaAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , C. AndrewsAffiliated withMechanical Engineering Department, Loyola Marymount University
    • , M. HahnAffiliated withNorthrop Grumman, Air Combat Systems
    • , E. FodranAffiliated withNorthrop Grumman, Air Combat Systems
    • , E. W. LeeAffiliated withNaval Air Systems Command, Naval Air Warfare Center
    • , H. GarmestaniAffiliated withMaterials Science and Engineering, Georgia Institute of Technology
    • , R. D. ConnerAffiliated withCalifornia State University Northridge
    • , D. BrickAffiliated withFasteel Corporation
    • , J. OgrenAffiliated withMechanical Engineering Department, Loyola Marymount University
    • , O. S. Es-SaidAffiliated withMechanical Engineering Department, Loyola Marymount University Email author 

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Abstract

Various thermo-mechanical processes were performed on a standard and a low oxygen content Ti-6Al-4V alloy. Testing was performed to determine whether it was possible to achieve a combination of tensile properties comparable to those of Ti-3Al-2.5V by means of cold working and annealing Ti-6Al-4V from a thickness of 0.671 cm (0.264 in.) to that between 0.081 and 0.094 cm (0.032-0.037 in.), which had never been carried out before. The resulting mechanical properties of this study were compared to the mechanical properties of Ti-3Al-2.5V to determine whether Ti-6Al-4V could be used as a suitable replacement for hydraulic tubing applications. The optimum results were achieved with 10-15% cold work and annealing at 750 °C (1382 °F) for 2 h between cold work reductions in thickness. It was concluded that Ti-6Al-4V was a suitable replacement for Ti-3Al-2.5V for hydraulic tubing with an increase in ultimate and yield strengths, but with a slight sacrifice of 5-10% elongation.

Keywords

cold rolling and annealing optimization of mechanical properties Ti-6Al-4V