Original Paper (Vol.56 No.12)

Effects of Artificial Small Defect and Corrosive Environment on Torsional Fatigue Strength of High Strength Spring Steel
Masami WAKITA，Takanori KUNO，Ayamitsu AMANO，Akihiko NEMOTO， Katsushi SARUKI and Keisuke TANAKA	1096
Effect of Stress Ratio on Axial-Loading Fatigue Characteristics of High Carbon-Chromium Bearing Steel in Very High Cycle Fatigue Regime
Kazuaki SHIOZAWA, Takayuki HASEGAWA and Seiichi NISHINO	1103
Influential Factors on the Formation of Granular Fracture Surface of Interior-Originating Fatigue in Ti-6Al-4V
Takashi NAKAMURA, Ryohei YAMASHITA, Hiroyuki OGUMA, Mina WAKITA and Toru NOGUCHI	1111
Configurations of Fish-Eyes Formed on Fatigue Fracture Surfaces of a Shot Peened Spring Steel Equivalent to SUP 12
Maya SUGIMOTO, Ryuji IKEDA, Keiichi SATOH, Kenji KANAZAWA and Akira TANGE	1118
Influence of Shot Peening on Fatigue Strength of Maraging Steels with Different Hardness
Takanori NAGANO, Norio KAWAGOISHI, Michihiko MORIYAMA, Qiang CHEN and Etsuichi NAGASHIMA	1126
Retardation of Fatigue Crack Growth on AC4CH Cast Aluminum Alloy by Laser Peening
Kiyotaka MASAKI,　Yasuo OCHI，Takashi MATSUMURA,　Yuji SANO,　Koichi AKITA　and Kentaro KAJIWARA	1133
A New Proposal for Retarding Fatigue Crack Reinitiation and Growth from Crack-Tip Introduced Stop-Drilled Hole by Providing Additional Holes
Anggit MURDANI，Chobin MAKABE，Akihide SAIMOTO，Tatsujiro MIYAZAKI and Ryouji KONDOU	1139
Estimation of Fatigue Life on Notched High-Strength Aluminum Alloy Plate under Two-Step Loading by Epuivalent Stress Amplitude
Toru TAKASE , Atsuhiro KOYAMA and Ryo YONEDA	1145
Evaluation of Rolling Contact Fatigue Properties of White Layer in Railway Wheel Steel
Takanori KATO, Atsushi SUGETA, Taro MAKITA, Yasuko MOTOYASHIKI, Miyuki YAMAMOTO and Eisuke NAKAYAMA	1150
Effect of Stress Relief Groove Shape on Fretting Fatigue Strength and Index for the Selection of Groove Shape
Yoshiyuki KONDO, Masanobu KUBOTA, Shunsuke KATOKA and Chu SAKAE	1156
Compressive Fatigue Strength and Fracture Mechanism of Giant Magnetostrictive Materials Fabricated by Powder Metallurgy
Noritaka HORIKAWA, Takashi NAKAMURA, Yukiko OGIUCHI, Hiroyuki AZUMA and Toru NOGUCHI	1163
Statistical Fatigue Properties of Ultra Low Carbon Steels under Rotating Bending Based on JSMS Database on Fatigue Strength of Metallic Material
Kenji OKADA, Kenji OKA, Atsushi SUGETA, Tatsuo SAKAI, Izuru NISHIKAWA and Akiyoshi SAKAIDA	1170
Development of an Efficient Multi Fatigue Testing System
Hiroshi HOHJO and Hajime IKUNO	1177