caa a22 4500 388018666 CHVBK 20180307124917.0 cr unu---uuuuu 161130e199806 xx s 000 0 eng 10.1557/JMR.1998.0228 doi S0884291400044642 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0228 Influence of surface hardening by laser irradiation on the loss factor of cast iron [Elektronische Daten] Surface hardening by laser irradiation was examined regarding the loss factor, which is the parameter of the vibration-damping characteristics, for flake graphite cast irons and spherical graphite cast irons. The surface of the samples was quenched by changing speed of beam, gas pressure, and beam frequency. It was found that the depth of the hardening region was from 0.12 mm to 1.11 mm, and the hardness of the boundary between the hardening and the nonhardening regions changed suddenly. It was confirmed that the loss factor of the laser hardened specimens increased considerably as compared with that of the as-cast specimens. The internal friction at the vicinity of the boundary between the hardening and the nonhardening regions may be responsible for this result. Copyright © Materials Research Society 1998 Adachi Hiromasa Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta-ku, Nagoya 456, Japan Masuo Yoshihiko Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta-ku, Nagoya 456, Japan Hasegawa Teruo Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta-ku, Nagoya 456, Japan Journal of Materials Research Cambridge University Press 13/6(1998-06), 1656-1659 0884-2914 13:6<1656 1998 13 JMR https://doi.org/10.1557/JMR.1998.0228 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0228 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Adachi Hiromasa Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta-ku, Nagoya 456, Japan NATIONALLICENCE 700 1- Masuo Yoshihiko Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta-ku, Nagoya 456, Japan NATIONALLICENCE 700 1- Hasegawa Teruo Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta-ku, Nagoya 456, Japan NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/6(1998-06), 1656-1659 0884-2914 13:6<1656 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge