[20a-224A-1~10] 3.7 Laser processing

[20a-224A-2] Residual strain by an interference shockwave

〇Yoichiro Hironaka¹, Yuki Kabeya², Kouhei Miyanishi¹, Keisuke Shigemori¹, Takeshi Matsuoka¹, Masanori Ozaki¹, Ryosuke Kodama¹, Kurita Takashi², Takeshi Watari², Yoshio Mizuta², Yoshinori Kato², Eisuke Miura³, Ryunosuke Kuroda³ (1.Osaka Univ., 2.HPK, 3.AIST)

Keywords:Residual stress

A study on generation of the thick stress field using the interference of the shock wave. A shock wave to occur by a ring-formed laser light focusing shape causes a Mach reflection and propagates to the deep inside of metal materials and forms compressive residual stress field to depth of around 3mm. We report it including the measurement method.