scholarly journals Creep-fatigue strength and its prediction of dissimilar metal electron beam welded joint.

1989 ◽  
Vol 38 (425) ◽  
pp. 168-174 ◽  
Author(s):  
Masakazu OKAZAKI ◽  
Yoshiharu MUTOH ◽  
Yuuji IKEDA
Keyword(s):  
Electron Beam ◽  
Fatigue Strength ◽  
Welded Joint ◽  
Dissimilar Metal ◽  
Creep Fatigue ◽  
Metal Electron

scholarly journals Creep-fatigue fracture behavior of dissimilar metal electron beam welded joint.

1987 ◽  
Vol 36 (410) ◽  
pp. 1239-1245
Author(s):  
Masakazu OKAZAKI ◽  
Yoshiharu MUTOH ◽  
Toshio YADA ◽  
Masao YAMAGUCHI
Keyword(s):  
Electron Beam ◽  
Fatigue Fracture ◽  
Fracture Behavior ◽  
Welded Joint ◽  
Dissimilar Metal ◽  
Creep Fatigue ◽  
Fatigue Fracture Behavior ◽  
Metal Electron

Creep-Fatigue Fracture of Dissimilar Metal Electron Beam Welded Joints at Elevated Temperature

1988 ◽  
Vol 110 (3) ◽  
pp. 212-218 ◽  
Author(s):  
M. Okazaki ◽  
Y. Mutoh ◽  
M. Yamaguchi
Keyword(s):  
Electron Beam ◽  
Fatigue Life ◽  
Welded Joints ◽  
Prediction Method ◽  
Strain Range ◽  
Local Strain ◽  
Base Metals ◽  
Dissimilar Metal ◽  
Creep Fatigue ◽  
Metal Electron

Creep-fatigue tests of dissimilar-metal electron beam welded joints between A387 Gr.22 ferritic low-alloy steel and AISI 405 ferritic stainless steel were carried out under strain-controlled cycling at a temperature of 873 K. It was found that the creep-fatigue life of a dissimilar metal welded joint was significantly shorter than those of its base metals. This resulted from the strain concentration on the AISI 405 side (with the lower deformation resistance.) It was also found that the hardness distribution was one of the important measures by which the local strain distribution was reflected. Furthermore, a simple prediction method for the creep-fatigue life of dissimilar metal welded joints was proposed based on the creep-fatigue life properties of its base metals by applying the strain range partitioning approach. The predicted lives were in good agreement with the experimental results.

scholarly journals Low cycle fatigue behavior of dissimilar metal electron beam welded joint at elevated temperature.

1987 ◽  
Vol 36 (402) ◽  
pp. 280-285
Author(s):  
Masakazu OKAZAKI ◽  
Yoshiharu MUTOH ◽  
Masayoshi TABATA ◽  
Kouichi HATAKEYAMA ◽  
Yoshiyasu ITOH
Keyword(s):  
Electron Beam ◽  
Elevated Temperature ◽  
Welded Joint ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Dissimilar Metal ◽  
Metal Electron

scholarly journals Characterising Residual Stresses in a Dissimilar Metal Electron Beam Welded Plate

2015 ◽  
Vol 130 ◽  
pp. 973-985 ◽  
Author(s):  
K. Abburi Venkata ◽  
C.E. Truman ◽  
D.J. Smith
Keyword(s):  
Electron Beam ◽  
Residual Stresses ◽  
Dissimilar Metal ◽  
Metal Electron

scholarly journals Fatigue strength of electron beam welded joint of SGV49 steel.

1985 ◽  
Vol 3 (1) ◽  
pp. 39-47
Author(s):  
Kunihiro Iida ◽  
Yoshimi Uratani ◽  
Shuhei Kuri ◽  
Takayoshi Yamauchi ◽  
Genta Takano
Keyword(s):  
Electron Beam ◽  
Fatigue Strength ◽  
Welded Joint

Development of High Chromium Steel for SFR in Japan and Creep-Fatigue Assessment of the Welded Joint

2008 ◽  
Author(s):  
Takashi Wakai ◽  
Nobuhiro Isobe ◽  
Shingo Date ◽  
Tai Asayama ◽  
Shigenobu Kubo
Keyword(s):  
Fatigue Strength ◽  
Grain Boundaries ◽  
Welded Joints ◽  
Ferritic Steel ◽  
Welded Joint ◽  
Assessment Procedure ◽  
Test Results ◽  
Strength Assessment ◽  
High Chromium ◽  
Creep Fatigue

This paper describes the provisional material specifications of the high chromium (Cr) ferritic steel for the Sodium cooled Fast Reactor (SFR) and development of creep-fatigue assessment procedure for the welded joint made of the steel. Based on the test results, it was revealed that tungsten (W) should be diminished to achieve better creep-fatigue strength and toughness after long term aging at elevated temperature. Metallurgical examinations using a scanning electron microscope showed that W precipitated on the grain boundaries as “Laves phase” during aging process. The toughness of the steel which contained much W might be degraded by such coarse precipitations on the grain boundaries. As a result, provisional specifications of the high Cr ferritic steel for SFR pipes and tubes were proposed. Creep-fatigue strength assessment procedure for the welded joints made of the steels was also investigated. An assessment procedure using 2-element model was proposed and verified by comparing with some creep-fatigue test results. The creep-fatigue lives observed in the experiments were well predicted by the proposed assessment procedure, but the failure of the welded joints really occurred in the heat affected zone (HAZ) in some creep-fatigue tests. Since the HAZ was not taken into account in the procedure, there were obviously some rooms for improvement. Creep-fatigue failure mechanisms of the welded joint must be investigated and the characteristics of the HAZ must be formulated for more precise creep-fatigue strength assessment.

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