Analysis of Excimer Laser-induced Plasma Using Probe Laser Beam
―Fundamental Research of Materials Processing by Excimer Laser (Report 2)―
　　　 Toshihiko OOIE and Isamu MIYAMOTO................................................................431


Flattening Behavior of Freely Fallen Molten Metal Droplet on Flat Substrate
　　　 Eiji NISHIOKA and Masahiro FUKUMOTO........................................................... 437　


Welding Characteristics with Three Nd , YAG Laser Beams Transmitted through Single Optical Fiber
　　　 Shigeki FUJINAGA, Hiroshi MIURA, Toru NARIKIYO, Seiji KATAYAMA

and Akira OHMORI ........................................................................................445
 

High Temperature Mechanical Properties in Laser Welds of Co-base superalloy and its Improvement by
Laser Surface Melting
　　　 Yoshinobu MAKINO, Keizoh HONDA and Seiichiro KIMURA .....................................462

Model Analysis of Circumferential GTA Welding of Pipes
　　　 Fumikazu MIYASAKA, Tomoyuki YOKOGAWA, Takeshi MASUTANI,

Hiroshi NISHIKAWA,Takayoshi OHJI and Yoshinori HIRATA ....................................471

Formation of High Efficient Heat-Transfer Surfaces with Brazed Porous Structure
　　　 Youichi HISAMORI and Kazumichi MACHIDA .......................................................479

A Development of Appearance Inspection System for Root Pass Welds of Small Caliber Pipes by
Composing Images
　　　 Minoru OHTA, Kenji KAJIWARA, Toshio ANZAI, Seiji ISHIKAWA

and Kenji KUROSU ........................................................................................487

Clarification of Mechanism of Embrittlement at Ta/Zr Diffsuion Bonded Interface by
using Zr-Ta Binary Alloys
―Study on Bonding of Zirconium and Stainless Steel (Report 4)―
　　　 Kazutoshi NISHIMOTO, Kazuyoshi SAIDA, Motoyoshi NAKAMURA

and Testuya FUJIMOTO ...................................................................................494

Behavior of Helium Bubble in Helium-Doped Stainless Steel Weldment for Nuclear Power Plant
　　　 Toshio KURODA and Yasushi KIKUCHI ...............................................................503

Precipitates in W Alloyed 9 Cr Weld Metal for Heat Resistant Steel
　　　 Hiroshi MORIMOTO, Takashi TANAKA, Shigeru OHKITA and Masao FUJI .................... 512

Effects of Shielding Gas on the Improving Effect of Corrosion Resistance in Laser Surface Melted Region
―Study on Low Temperature Sensitization in Weldments of Austenitic Stainless Steels and
Its Improvement by Laser Surface Melting Treatment (Report 4)―
　　　 Kazutoshi NISHIMOTO and Hiroaki MORI ..............................................................522

Single-Crystallization Behavior in TLP-Bonded Interlayer
―Transient Liquid Phase Bonding of Ni-Base Single Crystal Supealloy (Report 6)―
　　　 Kazutoshi NISHIMOTO, Kazuyoshi SAIDA, Daeup KIM, Satoru ASAI

and Yasuhiro FURUKAWA ................................................................................ 530

Development of Coated-Wire bonding Technology
　　　 Tsuyoshi KANEDA, Hiroshi WATANABE, Yukiharu AKIYAMA, Kunihiro TSUBOSAKI,

Asao NISHIMURA and Kunihiko NISHI ................................................................ 540