scholarly journals Effect of Weld Bead Shape on the Fatigue Behavior of GMAW Lap Fillet Joint in GA 590 MPa Steel Sheets

Metals ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 399 ◽  
Author(s):  
Insung Hwang ◽  
Dong-Yoon Kim ◽  
Geunho Jeong ◽  
Munjin Kang ◽  
Dongcheol Kim ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Weld Bead ◽  
Steel Sheets ◽  
Fillet Joint

scholarly journals Effect of Porosity on the Fatigue Behavior of Gas Metal Arc Welding Lap Fillet Joint in GA 590 MPa Steel Sheets

Metals ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 241 ◽  
Author(s):  
Dong-Yoon Kim ◽  
Insung Hwang ◽  
Geunho Jeong ◽  
Munjin Kang ◽  
Dongcheol Kim ◽  
...  
Keyword(s):  
Arc Welding ◽  
Fatigue Behavior ◽  
Gas Metal Arc Welding ◽  
Steel Sheets ◽  
Metal Arc Welding ◽  
Fillet Joint

In Sight of a Fillet Joint Based on Welding Force Method

2016 ◽  
Vol 32 (04) ◽  
pp. 206-215
Author(s):  
Debarata Podder ◽  
Amith Gadagi ◽  
Nisith Ranjan Mandal ◽  
Sreekanta Das
Keyword(s):  
Weld Bead ◽  
Elastic Model ◽  
Plastic Strains ◽  
Shipbuilding Steel ◽  
Finite Element Software ◽  
Force Method ◽  
Longitudinal Residual Stress ◽  
Welding Forces ◽  
Fillet Joint ◽  
Welding Force

Analysis of fillet-welded T-sections was carried out using the commercial finite element software ANSYS® for SM400A shipbuilding steel. To avoid the time consuming experimental technique, this model was validated with the existing experimental and numerical results. The vertical deflection, transverse shrinkage, and longitudinal residual stress were considered to validate the present model. After validating the model, the longitudinal, transverse, and normal plastic strains were collected from flange, web, and weld bead portions throughout the thickness and were averaged. These plastic strains were converted into corresponding longitudinal, transverse, and normal welding forces and were applied in an elastic model to obtain the distortions. The average welding force method was found to be very efficient in determining the distortions of welded structures. It was found that the proper distortion pattern for single-sided fillet welding can be obtained by incorporating the additional shrinkage forces from the weld bead.

scholarly journals Effects of material strength levels and nugget sizes on fatigue behavior of resistance spot welded steel sheets

2019 ◽  
Vol 37 (4) ◽  
pp. 152-161
Author(s):  
Yoshihiko UEMATSU ◽  
Nao KAWABE ◽  
Toshifumi KAKIUCHI ◽  
Yudai KATO ◽  
Yasuaki OKITA ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Material Strength ◽  
Welded Steel ◽  
Resistance Spot ◽  
Steel Sheets ◽  
Spot Welded

scholarly journals Characterization of Damage Evolution on Hot Flat Rolled Mild Steel Sheets by Means of Micromagnetic Parameters and Fatigue Strength Determination

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2486
Author(s):  
Mirko Teschke ◽  
Julian Rozo Vasquez ◽  
Lukas Lücker ◽  
Frank Walther
Keyword(s):  
Fatigue Strength ◽  
Damage Evolution ◽  
Fatigue Behavior ◽  
Measurement Techniques ◽  
Rolling Process ◽  
Forming Process ◽  
Steel Sheets ◽  
Internal Surfaces ◽  
Load Increase ◽  
Flat Rolling

In continuous casting processes, inevitable voids (damage) are generated inside the material. The subsequent forming process of hot flat rolling offers the potential of healing these defects by closing the voids and bonding the internal surfaces. In this paper, different forming conditions from hot flat rolling process were characterized with micromagnetic measurement techniques and the influence of the damage evolution on the fatigue behavior was investigated. To characterize the reduction of voids through hot flat rolling processes, nondestructive testing techniques are required. Therefore, micromagnetic measurements such as Barkhausen noise, incremental permeability, and harmonic analysis were carried out, correlated with the number of voids, and compared with each other. The influence of damage evolution of different forming conditions on the fatigue behavior was characterized based on instrumented constant amplitude and multiple amplitude (load increase) tests. A significant increase in fatigue strength due to the hot flat rolling process, which leads to a reduction in the number of voids, was observed. In addition, the fracture surfaces of the specimens were analyzed in the scanning electron microscope.

Fatigue Behavior of Dissimilar Ultrasonic Spot Welds in Lap-Shear Specimens of Magnesium and Steel Sheets

2011 ◽  
Vol 4 (1) ◽  
pp. 581-588 ◽  
Author(s):  
Teresa J. Franklin ◽  
Jwo Pan ◽  
Michael Santella ◽  
Tsung-Yu Pan
Keyword(s):  
Fatigue Behavior ◽  
Spot Welds ◽  
Steel Sheets ◽  
Lap Shear

scholarly journals Evaluation of Fatigue Behavior for Laser Welded High Strength Steel Sheets (SPFC590)

2012 ◽  
Vol 20 (5) ◽  
pp. 53-64 ◽  
Author(s):  
Cheol Heo ◽  
Jong-Wan Kwon ◽  
Hyun-Deog Cho ◽  
Sung-Jong Choi ◽  
Woo-Young Chung
Keyword(s):  
High Strength Steel ◽  
Fatigue Behavior ◽  
High Strength ◽  
Steel Sheets

Laser Direct Energy Deposition Welding of AISI 316 Stainless Steel Sheets

2019 ◽  
Author(s):  
Alessandro Ascari ◽  
Alessandro Fortunato ◽  
Erica Liverani ◽  
Adrian H. A. Lutey
Keyword(s):  
Stainless Steel ◽  
Energy Deposition ◽  
Rapid Development ◽  
Lap Joints ◽  
Weld Bead ◽  
Main Process ◽  
Direct Energy Deposition ◽  
Steel Sheets ◽  
Wide Range ◽  
Direct Energy

Abstract The present paper assesses the applicability of laser powder direct energy deposition for welding of thin stainless steel sheets. Considering the rapid development of laser cladding and relatively wide range of equipment available in modern industrial settings, this technology can also be applied to laser welding, where the procedure is performed with a filler material comprising blown powder. To this end, an exhaustive experimental campaign has been carried out with the aim of evaluating the influence of the main process parameters, including laser power and powder feed rate, on the resulting weld bead characteristics. Two joint configurations have also been considered to assess the best solution in terms of both chamfer shape and sheet positioning. Butt and lap joints were prepared, with 30° and 45° V-groove configurations tested and characterized in the former case. In order to assess the resulting weld quality, metallographic analyses were carried out to measure the main morphological parameters of the weld beads, including width, penetration depth and reinforcement, and to evaluate the possible presence of defects such as pores, cracks or lack of melting. Tensile tests were also carried out with the purpose of characterizing the overall mechanical performance of the joints. These tests demonstrated good overall process feasibility and highlighted the fact that lap joints and 30° V-groove butt joints were the best configurations in terms of both weld bead quality and fused zone morphology.

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