1. Laser Shock Peening of Bulk Metallic Glasses â Part 1 Center for Laser Applications UT Space Institute Tullahoma, TN 37388-9700 http://www.utsi.edu Midterm Presentation MSE516: Mechanical Metallurgy Deepak Rajput Email: [email_address] / Web: http://drajput.com
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3. Team Members Dr. Hofmeister Director, CLA UT Space Institute Alexander Terekhov Deepak Rajput Dr. Lino Costa Dr. Xiaoxuan Li Center for Laser Applications Kate Lansford
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9. Peening: Generation of Compressive Stresses Cont. Shot peened gear Metal Improvement Company Paramus, New Jersey Problem: Leaves surface dimpling
10. Peening: Generation of Compressive Stresses Cont. Laser Peening or Laser Shock Peening (LSP): â A process that induces residual compressive stresses on the surface of a component due to shock waves produced by plasmaâ â Four times deeper than that obtainable from a conventional Shot Peening processâ Prototype Laser Peening machines were developed in the 1970s .
11. Laser Shock Peening Historical background: William I. Linlor Hughes Research Laboratories Malibu, California Linlor, W.I. (1962) âPlasma Produced by Laser Burstsâ Bull. Am. Phys. Soc. 7, 440 Ready, J.F., (1963) âDevelopment of Plume of Material Vaporized by Giant Pulse Laserâ, Appl. Phys. Letters 3 (1), pp 11-13 # giant pulse investigation, carbon plume speed in air Linlor, W.I. (1963) âIon Energies Produced by Laser Giant Pulseâ, Appl. Phys. Letters 3 (11), pp 210-211
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14. Laser Shock Peening Process layout Taken from Metal Improvement Company website (http://www.metalimprovement.com/laser_peening.php)
15. Laser Shock Peening Research @ Purdue University Dr. Yung C. Shin (Professor) Laser-Assisted Materials Processing Laboratory (LAMPL) School of Mechanical Engineering Purdue University, West Lafayette, Indiana
16. Laser Shock Peening Example: Robot controlled LSP Taken from Metal Improvement Company website (http://www.metalimprovement.com/laser_peening.php)
17. Laser Shock Peening Laser Shock Peening of 6061-T6 Aluminum Alloy Rubio-Gonzalez C. et al. (2004), âEffect of Laser Shock Processing on Fatigue Crack Growth and Fracture Toughness of 6061-T6 Aluminum Alloyâ, Mat. Sci. Eng. â A, 386: 291-295
18. Laser Shock Peening Laser Shock Peening of 6061-T6 Aluminum Alloy Rubio-Gonzalez C. et al. (2004), âEffect of Laser Shock Processing on Fatigue Crack Growth and Fracture Toughness of 6061-T6 Aluminum Alloyâ, Mat. Sci. Eng. â A 386: 291-295 Fatigue crack growth rates with and without LSP under different pulse densities
19. Laser Shock Peening Laser Shock Peening of 6061-T6 Aluminum Alloy Rubio-Gonzalez C. et al. (2004), âEffect of Laser Shock Processing on Fatigue Crack Growth and Fracture Toughness of 6061-T6 Aluminum Alloyâ, Mat. Sci. Eng. â A 386: 291-295 Load-displacement curves to determine fracture toughness