scholarly journals Influence of welding wire composition on weld quality in welded joints of dissimilar steels in gas-shielded mechanized welding

2017 ◽  
Vol 2017 (10) ◽  
pp. 52-56
Author(s):  
V.P. Elagin ◽  
Keyword(s):  
Welded Joints ◽  
Weld Quality ◽  
Welding Wire ◽  
Dissimilar Steels ◽  
Mechanized Welding

scholarly journals Robustness of the HFMI techniques and the effect of weld quality on the fatigue life improvement of welded joints

2020 ◽  
Vol 64 (11) ◽  
pp. 1947-1956
Author(s):  
R. Aldén ◽  
Z. Barsoum ◽  
T. Vouristo ◽  
M. Al-Emrani
Keyword(s):  
Fatigue Life ◽  
Welded Joints ◽  
Fatigue Testing ◽  
Considerable Effect ◽  
Quality Level ◽  
Weld Quality ◽  
Treatment Results ◽  
Life Improvement ◽  
Consistent Treatment ◽  
Good Agreement

Abstract Robustness of HFMI treatment in different weld qualities according to ISO 5817 was studied, and fatigue testing of the treated samples was carried out in order to investigate the effect of the weld quality prior treatment. The results show that HFMI-treated welds with weld quality level D shows fatigue life improvements that fall within the IIW recommendations for HFMI. No significant influence from the HFMI operator or HFMI equipment on the fatigue life was found. However, the scatter in fatigue testing results varied with HFMI operator and indicated that different HFMI operators could produce consistent treatment results. A considerable effect on fatigue life from HFMI tool radius was found, where the 2-mm tool radius showed considerably greater fatigue life compared with the 1.5-mm tool radius. According to IIW (Marquis and Barsoum 2016), for steel grade SY = 700 MPa, the fatigue strength recommendation is FAT 160 (m = 5) for transverse stiffener–welded joints with as-welded quality B according to ISO 5817 (ISO/TC 44/SC 10 2011), prior to treatment. It can be observed in the current study that fatigue-tested HFMI-treated welded joints, welded with weld quality D, are in good agreement with the IIW recommendations.

Preparation and Evaluation of a Novel Al-5.4Si-0.5Mg Welding Wire

2014 ◽  
Vol 788 ◽  
pp. 176-181
Author(s):  
Hao Wang ◽  
Chang Shu He ◽  
Dong Wang ◽  
Xiang Zhao ◽  
Liang Zuo
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
Arc Welding ◽  
Aging Treatment ◽  
Direct Chill ◽  
The Novel ◽  
Welding Wire ◽  
Treatment Conditions ◽  
Dc Casting ◽  
Preparation And Evaluation

An Al-5.4Si-0.5Mg filler wire was developed and produced by direct chill (DC) casting, extrusion, and roll-die and hole-die drawing for the welding of newly developed Mg-containing high-Si aluminum alloys. The Al-12.7Si-0.7Mg alloy plates were butt-welded by tungsten inert gas arc welding (TIG) method using the as-produced welding wire. The microstructures and mechanical properties of these welded joints in different solid solution and artificial aging treatment conditions were studied to evaluate the weld qualities of the novel welding wire. The results showed that the Al-5.4Si-0.5Mg welding wire was an ideal special welding wire of the Al-12.7Si-0.7Mg alloy and the filler metal proved to be heat-treatable. The welded joints exhibited much higher mechanical properties after the post-weld heat treatment (PWHT). All of this provides the possibility of wide application of the novel Al-5.4Si-0.5Mg welding wire and the Al-12.7Si-0.7Mg alloy weldments.

Hybrid fuzzy-grey-Taguchi based multi weld quality optimization of Al/Cu dissimilar friction stir welded joints

2016 ◽  
Vol 4 (3) ◽  
pp. 237-247 ◽  
Author(s):  
Prakash Kumar Sahu ◽  
Kanchan Kumari ◽  
Sukhomay Pal ◽  
Surjya K. Pal
Keyword(s):  
Welded Joints ◽  
Weld Quality ◽  
Quality Optimization ◽  
Friction Stir ◽  
Grey Taguchi

Simulation of Structure Formation Processes of Dissimilar Steels Welded Joints Using an Intermediate Layer

2015 ◽  
Vol 788 ◽  
pp. 218-224
Author(s):  
Aelita Nikulina ◽  
Vadim Yu. Skeeba ◽  
Alexandra Chevakinskaya ◽  
Pavel Komarov
Keyword(s):  
Carbon Steel ◽  
Welded Joints ◽  
High Carbon Steel ◽  
Variable Parameter ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Nickel Steel ◽  
Low Carbon ◽  
High Carbon ◽  
Dissimilar Steels

This paper shows the results of solving a 3D problem to define types of structures and tensions which can appear during the butt contact welding process of dissimilar steels through low carbon steel inserts. The finite element method to calculate welded structures was used. The thickness of inserts was the main variable parameter. According to the results of numerical simulation using inserts can increase the reliability of welded joints between pearlitic high-carbon steel and austenitic chromium-nickel steel. The best result was obtained by using an insert with a thickness less than 20 mm. Structural studies of the welded joints between high-carbon steel and chromium-nickel steel through low-carbon inserts confirm the results of mathematical modeling.

Research on the quality of welded joints of P265GH heatresistant steel pipes at electron beam mechanized welding

2020 ◽  
Vol 65 (1) ◽  
pp. 21-28
Author(s):  
Lenuța Cîndea
Keyword(s):  
Electron Beam ◽  
Welded Joints ◽  
Electron Beam Welding ◽  
Steel Pipes ◽  
Knowing That ◽  
Mechanized Welding ◽  
Mechanical Metallurgy ◽  
Welded Seam ◽  
Local Hardening

This paper analyzes the quality of welded joints of high temperature resistant steel pipe at electron beam welding, knowing that the mechanical properties of these types of steels are influenced by the interaction of different processes specific to physical and mechanical metallurgy. Analyzing the values of the local hardening estimator ΔHV10 calculated between the characteristic areas of welded joints, it is observed that it has a decreasing tendency at thermally de-stressed joints, in all areas of the welded joints, especially in the welded seam.

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