High Repetition Laser Shock Peening on Magnesium Based Biodegradable Alloys

New generation of metallic implants through capability of absorption within biological environment \nhas been introduced in recent researches. Although, magnesium implant with proper \nbiocompatibility has been proposed as biodegradable metallic implant, its insufficient mechanical \nattributes must be enhanced for implantation within human body. Laser shock peening has been \nsuccessfully conducted for modification of magnesium implant. Overall, laser shock peening can be \nperformed by low repetition rate (less than 30 Hz) and high power pulsed laser which needs \nexpensive devices. In order to laser shock peen magnesium alloys that have a lower mechanical \nstrength, it is better to use high repetition pulsed laser which is much faster and economical. \nRecently, high repetition rate laser shock peening of magnesium has been theoretically found \nfeasible in previous research of authors. In order to validate occurrence of high repetition rate laser \nshock peening, changes in surface topography and hardness are evaluated on the magnesium \nspecimens