Special zone in multi-layer and multi-pass welded metal and its role in the creep behavior of 9Cr 1Mo welded joint

2016 ◽  
Vol 108 ◽  
pp. 195-206 ◽  
Author(s):  
Wen Liu ◽  
Fenggui Lu ◽  
Yuanhang Wei ◽  
Yuming Ding ◽  
Peng Wang ◽  
...  
Keyword(s):  
Creep Behavior ◽  
Welded Joint ◽  
Special Zone

Investigation on creep behavior of welded joint of advanced 9%Cr steels

2014 ◽  
Vol 30 (2) ◽  
pp. 197-205 ◽  
Author(s):  
Donghai Meng ◽  
Fenggui Lu ◽  
Haichao Cui ◽  
Yuming Ding ◽  
Xinhua Tang ◽  
...  
Keyword(s):  
Creep Behavior ◽  
Welded Joint ◽  
Cr Steels ◽  
Image Position

Abstract

Analysis of the Creep Behavior of P92 Steel Welded Joint

2011 ◽  
Vol 20 (8) ◽  
pp. 1474-1480 ◽  
Author(s):  
Junchao An ◽  
Hongyang Jing ◽  
Guangchun Xiao ◽  
Lei Zhao ◽  
Lianyong Xu
Keyword(s):  
Creep Behavior ◽  
Welded Joint ◽  
P92 Steel

Microstructural and mechanical characterization of the effect of the welding process on creep behavior of welded joint and base metal specimens of Inconel 600

MRS Advances ◽  
2020 ◽  
Vol 5 (59-60) ◽  
pp. 3003-3014
Author(s):  
Lourdes Y. Herrera-Chávez ◽  
Alberto Ruiz ◽  
Víctor H. López-Morelos ◽  
Carlos Rubio-González ◽  
Martín R. Barajas-Álvarez ◽  
...  
Keyword(s):  
Base Metal ◽  
Creep Behavior ◽  
Heat Affected Zone ◽  
Structural Integrity ◽  
Welded Joint ◽  
Welding Process ◽  
Creep Tests ◽  
Inconel 600 ◽  
Two Temperatures

AbstractIn this study, plates of Inconel 600 superalloy were gas metal arc welded to investigate the effects of the welding process on the creep behavior of the welded samples and compare it to the creep behavior of samples in the as-received condition. Creep tests were performed at two temperatures (600 and 650 °C) with different stress levels. During the welding process, three distinctive microstructural zones are generated, i.e. welded material, heat affected zone, and base metal that may affect the properties of the welded joint. Microstructural, elemental analysis of samples was conducted using Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The experimental results show that creep rupture preferentially occurs in the heat-affected zone of the base metal at 4 mm from the fusion line and that the creep behavior of welded samples is different from that of the base metal. These results can be used in the design of structural components to assure their structural integrity.

Creep Behavior Evaluation of Hastelloy X Welded Joint

1981 ◽  
Vol 55 (2) ◽  
pp. 479-486 ◽  
Author(s):  
Kunihiko Satoh ◽  
Masao Toyoda ◽  
Shigetomo Matsui ◽  
Eisuke Mori ◽  
Shigeki Shimizu ◽  
...  
Keyword(s):  
Creep Behavior ◽  
Welded Joint ◽  
Hastelloy X

Creep behavior and microstructure evaluation of welded joint in dissimilar modified 9Cr–1Mo steels

2015 ◽  
Vol 644 ◽  
pp. 337-346 ◽  
Author(s):  
Wen Liu ◽  
Xia Liu ◽  
Fenggui Lu ◽  
Xinhua Tang ◽  
Haichao Cui ◽  
...  
Keyword(s):  
Creep Behavior ◽  
Welded Joint ◽  
Microstructure Evaluation

Creep Behavior of a Bimetallic Welded Joint in a Nuclear Piping System

2003 ◽  
Author(s):  
Y. P. Yang ◽  
F. W. Brust ◽  
J. Oh
Keyword(s):  
Residual Stress ◽  
Creep Behavior ◽  
Welded Joint ◽  
Creep Damage ◽  
Steel Pipe ◽  
304 Stainless Steel ◽  
Creep Model ◽  
Piping System ◽  
Damage Development ◽  
Modeling Tools

The information of the creep behavior of a thick welded joint is very important to secure the safety of high temperature service devices. The creep damage development and behavior are very complex; hence it is time consuming to practice the experiment and theoretical analyses. In this paper a simple accurate model was developed to analyze the creep behavior of weld metal and heat-affected zone on a thick bimetallic welded pipe. The pipe was made by welding an A508-class-2 carbon steel pipe to a 304 stainless steel pipe with a shielded metal arcwelding process using INCONEL 182 electrodes. Virtual fabrication technology weld modeling tools (VFT™) developed jointly by Battelle and Caterpillar was used to obtain welding-induced residual stress. The weld residual stress was read into the creep model as initial stress condition for creep analysis. A temperature 1000°F was applied on the bimetallic weld model with inside pressure and axial loading. The simulation results indicated that creep strains were not uniform through the weld joint due to weld residual stresses, materials creep behavior and geometry changes. Some stress and strain concentrations were found on the A508 steel near buttering region, which results in axial cracks.

Comparison of Creep Behavior of 2.25Cr-1.6W/Mod. 9Cr-1Mo Dissimilar Weld Joint with Each Matching Filler Metal

2005 ◽  
Vol 297-300 ◽  
pp. 1452-1457
Author(s):  
Jong Jin Park ◽  
Cheol Hong Joo ◽  
Jeong Tae Kim ◽  
Hyu Sun Yu
Keyword(s):  
Creep Behavior ◽  
Creep Strength ◽  
Weld Joint ◽  
Filler Metal ◽  
Welded Joint ◽  
Creep Damage ◽  
Creep Rupture ◽  
Dissimilar Weld ◽  
Weld Joints ◽  
Carbon Migration

This paper describes the evaluation of the creep behavior with two types of matching filler metals for 2.25Cr-1.6W(T23)/Mod. 9Cr-1Mo(T91) dissimilar weld joint. Through the welding procedure qualification tests prior to the creep tests, optimum PWHT holding times at 745±5oC were determined as 30minutes for T23 matching filler metal and 60minutes for T91 matching filler metal. It was also confirmed that carbon migration across the weld interfaces and the softened area at HAZ occurred during PWHT. Creep rupture tests were carried out at 575-650oC and 70-220MPa for two dissimilar metal welds manufactured by an optimum PWHT condition. From the comparison of creep rupture strength, it was shown that the creep strength of the welded joint including T23 matching filler metal was similar to that of T23 base material and somewhat higher than that of the welded joint including T91 matching filler metal. From metallurgical study on the crept specimen, the creep damage of T23/T91 dissimilar weld joints could occur at T23 side IC HAZ and near the T23/T91 weld interface simultaneously. However, the final failure locations seemed to depend on the filler metal and the cause of this phenomenon might be regarded as the additional effect of carbon migration across the weld interfaces. It is thought that the dissimilar weld including T91 filler metal which failures at T23 side CG HAZ subject to both metallurgical notch and carbon migration become more susceptible to creep damage than that including T23 filler metal in which the carbon depletion occurs at the T23 filler metal with higher creep strength than T23 HAZ. T23 filler metal can therefore be proposed for matching filler metal of T23/T91 dissimilar weld joints

Calculation And Experimental Substantiation Of Optimal Design Of The Welded Joint Of Plates On Соver Plates

2020 ◽  
pp. 17-24
Keyword(s):  
Welded Joint ◽  
Experimental Studies ◽  
Engineering Calculation ◽  
Tensile Tests ◽  
Physical Nonlinearity ◽  
Steel Plates ◽  
Optimal Parameters ◽  
Actual Problem ◽  
Numerical Research ◽  
Cover Plates

The article is devoted to the actual problem of assigning optimal parameters for connecting steel plates on cover plates with angular welds that are widely used in construction practice. The article presents the results of a comprehensive study of operation of a welded assembly of the plates connection on cover plates. An algorithm is proposed for determining the optimal parameters of a welded joint with fillet welds on the cover plates, which makes it possible to obtain a strength balanced connection. The results of full-scale tensile tests of models were presented. These results confirmed the correctness of the assumed design assumptions, and made it possible to obtain a form of destruction, not characteristic and not described in the normative literature, expressed by cutting the main elements along the length of the overlap in the joint. The possibility of such a form of destruction was confirmed by the results of numerical research in a nonlinear formulation. The optimal parameters of the nodal welded joint determined by engineering calculation are confirmed by experimental studies, as well as by the results of numerical experiments on models of calculation schemes, taking into account the physical nonlinearity of the material operation. The obtained dependence for determining the bearing capacity of the joint by the cut-off mechanism and the expression for limiting the overlap length of the cover plates will make it possible to predict the nature of the fracture and design equally strong joints.

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