Quarterly Journal of the Japan Welding Society
Vol. 19 No. 1 February 2001
Contents
Program of the National Meeting of Spring 2001 　 3
Reports 　 　
Detection of Peculiar Frequency of Molten Pool and Estimation of Penetration in Pulse TIG Welding
―Estimation and Control of Penetration by Detecting Peculiar Frequency of Molten Pool―		 Yasuo SUGA, Takuya TOKIWA
and Kaoru YASUDA		 19
Relationships between Microstructure, Mechanical Properties of Plasma-sprayed Ni-50Cr Coatings and Spray Parameters Keiji SONOYA, Chang-Jiu LI
and Fu-Hai LI		 27
Laser Welding in Vortex Flow Shielding Gas with Tornado Nozzle
―Numerical Analysis of Swirling Motion on Welding Results―		 Shinichiro YOKOYA, Shigeta TAKAGI,
Tomonori OGATA, Seiji KATAYAMA
and Akira MATUNAWA		 37
Characteristics of Bead Formation Phenomena in Narrower Gap Welding and Proposal of New Welding Process at Ultra-Narrow Gap Joint
―Development of Ultra-Narrow Gap GMA Welding Process (Report 1)―		 Terumi NAKAMURA and Kazuo HIRAOKA 44
Resistance to Hydrochloric Acid Solution of Fe-Cr-Mo-8P-2C Amorphous Coatings Sprayed by HVOF Process Fumitaka OTSUBO, Hidenori ERA,
and Katsuhiko KISHITAKE		 54
Phosphorus Segregation in Grain Boundary Induced by α/γ Transformation during Welding
―Study of Low-Ductility Creep-Fracture in HAZ of Cr-Mo Steels (Report 3)―		 Koreaki TAMAKI, Jippei SUZUKI,
Hiroshi KAWAKAMI and Yasuyuki WATANABE		 60
Impact Toughness of Stainless Steel Joint Brazed with Ni-Cu Based Filler Metals Shinji SAITO, Takashi KAYAMOTO
and Tadao ONZAWA		 70
Effect of Ni Content on Weld Hot Cracking Susceptibility of Fully Austenitic Fe-Cr-Ni Alloy
―Investigation on Weld Hot Cracking Susceptibility of Fully Austenitic Fe-Cr-Ni Alloy (Report 1)―		 Toshinobu NISHIBATA, Hiroyuki HIRATA,
Kazuhiro OGAWA and Yu-ichi KOMIZO		 77
Diffution Bonding of Tungsten to Titanium Kazumasa NISHIO, Hirohisa MASUMOTO
and Hidehiko MATSUDA		 85
Precipitation Behavior of σ Phase for Reheated Duplex Stainless Steel Weld Metal Katsuyuki NAKADE, Kazuyuki OHE
and Toshio KURODA		 92
Formation Mechanism of Different Ferrite Morphologies and Effect of Ferrite Morphology on Cryogenic Impact Toughsess and Pitting Corrosion Resistance in Austenitic Stainless Steel Weld Metals Hiroshige INOUE, Toshihiko KOSEKI,
Masao FUJI and Kazutoshi NISHIMOTO		 100
Hardness Distribution of Aluminum Alloy A5052 Welded with YAG Laser Tomiko YAMAGUCHI, Mitsuaki KATOH,
Kazumasa NISHIO and Kenichi FUKAMI		 114
Improvement of Impact Strength for Friction Welded Joint by Adapting the Shape of Weld Interface Yoshiyasu ITOH, Takahiko SHINDOH,
Hideyasu ANDOH and Takeshi UDAGAWA		 122
Relaxation of Welding Residual Stresses by Reversed and Repeated Loadings Masahiro TAKANASHI and Kunihiro IIDA 129
Relaxation of Stress Concentration at Weld Toe by Surface Softening in Ni-Base Superalloy Welded Joints Fumiyoshi MINAMI, Wataru TAKAHARA,
Takao FUKUNAGA and Masaaki HASHIMOTO		 140
The General Conditions Which The Reheat Cracking Test Specimen Must Have You Chul KIM and Han Sur BANG 148
Reliability of Au/Al Bonds and its Governing Factors Tomohiro UNO and Kohei TATSUMI 156
Effect of Magnesium on Deoxidizing Reaction of Particle Surface Oxide Film at Elevated Temperature
―Sintering Phenomenon of Aluminum Alloy Powder Particle and Analysis on Particle Surface Structure (1)―		 Katsuyoshi KONDOH, Atsushi KIMURA
and Ryuzo WATANABE		 167
Symposium 　 175