scholarly journals Formation of Unmixed Zone in the Fusion Boundary of Dissimilar Metal Weld Zone

2007 ◽  
Vol 25 (4) ◽  
pp. 1-3 ◽  
Author(s):  
Chang-Hee Lee
Keyword(s):  
Weld Zone ◽  
Fusion Boundary ◽  
Dissimilar Metal ◽  
Dissimilar Metal Weld ◽  
Metal Weld

Neutron Diffraction Measurements on Dissimilar Metal Weld of Cu-Al Obtained by Friction Stir Welding Method

2014 ◽  
Vol 896 ◽  
pp. 646-649 ◽  
Author(s):  
Tri Hardi Priyanto ◽  
Bharoto ◽  
Rifai Muslih ◽  
Herry Mugirahardjo
Keyword(s):  
Friction Stir Welding ◽  
Neutron Diffraction ◽  
Weld Zone ◽  
Weight Percent ◽  
Al Alloy ◽  
Friction Stir ◽  
Dissimilar Metal ◽  
Percent Composition ◽  
Dissimilar Metal Weld ◽  
Metal Weld

Dissimilar metal weld (DMW) of Cu and Al alloy, namely DMW CuAl, was produced using Friction Stir Welding (FSW) technique. Characterization was performed at retreating and advancing side by neutron diffraction method. It is obtained that the weight percent composition of Cu and Al are dynamically change, depend on weld zone and welding direction. In SZ Cu element 55,18%, and it is majority component in the retreating side and it decreases gradually from the retreating side to the advancing side. The weight percent composition of Cu in the retreating side at HAZ and TMAZ are 99.25 %, and 61.25%, respectively, and in the advancing side are 0.35% and 38.75 %, respectively. Cu Bragg peaks of (111), (200) and (220) show that peak width ratio of BMZ / SZ is approximately 13%. This indicates a change in crystallite size that affects the behavior of plastic deformation in the welded material.

Stress Corrosion Cracking of the Fusion Boundary for 304L/82 Dissimilar Metal Weld Joint in Simulated Primary Water

CORROSION ◽  
10.5006/3343 ◽  
2019 ◽  
Vol 76 (2) ◽  
pp. 176-187
Author(s):  
Liang Zhao ◽  
Jiamei Wang ◽  
Haozhan Su ◽  
Donghai Du ◽  
Lefu Zhang ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Heat Affected Zone ◽  
Corrosion Cracking ◽  
Intergranular Cracking ◽  
Fusion Boundary ◽  
Dissimilar Metal ◽  
Primary Water ◽  
Dissimilar Metal Weld ◽  
Metal Weld

The stress corrosion cracking behavior of the fusion boundary for 304L/82 dissimilar metal weld joint was studied in simulated primary water. Analytical electron microscopy was utilized to characterize the cracking features. Results demonstrated that the heat-affected zone in Type 304L has a higher stress corrosion cracking susceptibility and the crack propagated from weld region to Type 304L heat-affected zone in the form of intergranular cracking. The electron back-scattered diffraction and transmission electron microscopy–electron dispersive x-ray spectroscopy results showed that the intergranular cracking in the heat-affected zone of Type 304L was caused by the high residual strain rather than grain boundary Cr-depletion in front of the crack tip. The suppressed crack growth rate in hydrogenated water was attributed to the stable Cr-rich oxide formed at crack tip.

scholarly journals Multi-technique study of precipitation in the near-fusion boundary region of an aged narrow-gap dissimilar metal weld

Materialia ◽  
2021 ◽  
pp. 101106
Author(s):  
F. De Geuser ◽  
A. Akhatova ◽  
F. Danoix ◽  
F. Robaut ◽  
M. Yescas ◽  
...  
Keyword(s):  
Boundary Region ◽  
Narrow Gap ◽  
Fusion Boundary ◽  
Dissimilar Metal ◽  
Dissimilar Metal Weld ◽  
Metal Weld

A crack-location correction for T0 analysis of an alloy 52 dissimilar metal weld

2019 ◽  
Vol 214 ◽  
pp. 320-334 ◽  
Author(s):  
Sebastian Lindqvist ◽  
Matias Ahonen ◽  
Jari Lydman ◽  
Pentti Arffman ◽  
Hannu Hänninen
Keyword(s):  
Crack Location ◽  
Dissimilar Metal ◽  
Dissimilar Metal Weld ◽  
Metal Weld

Brittle Fracture Analysis of a Dissimilar Metal Weld

2013 ◽  
Author(s):  
A. Blouin ◽  
S. Chapuliot ◽  
S. Marie ◽  
J. M. Bergheau ◽  
C. Niclaeys
Keyword(s):  
Brittle Fracture ◽  
Weld Joint ◽  
Threshold Stress ◽  
Base Alloy ◽  
Welding Process ◽  
Loading Conditions ◽  
Brittle To Ductile Transition ◽  
Dissimilar Metal ◽  
Dissimilar Metal Weld ◽  
Metal Weld

One important part of the integrity demonstration of large ferritic components is based on the demonstration that they could never undergo brittle fracture. Connections between a ferritic component and an austenitic piping (Dissimilar Metal Weld — DMW) have to respect these rules, in particular the Heat Affected Zone (HAZ) created by the welding process and which encounters a brittle-to-ductile transition. Within that frame, the case considered in this article is a Ni base alloy narrow gap weld joint between a ferritic pipe (A533 steel) and an austenitic pipe (316L stainless steel). The aim of the present study is to show that in the same loading conditions, the weld joint is less sensitive to the brittle fracture than the surrounding ferritic part of the component. That is to say that the demonstration should be focused on the ferritic base metal which is the weakest material. The bases of this study rely on a stress-based criterion developed by Chapuliot et al., using a threshold stress (σth) below which the cleavage cannot occur. This threshold stress can be used to define the brittle crack occurrence probability, which means it is possible to determine the highest loading conditions without any brittle fracture risk.

Sign in / Sign up

Export Citation Format

Share Document