Fatigue Life of Resistance Spot Welding on Dual-Phase Steels

2017 ◽  
pp. 225-236
Author(s):  
J. H. Ordoñez Lara ◽  
R. R. Ambriz ◽  
C. García ◽  
G. Plascencia ◽  
D. Jaramillo
Keyword(s):  
Fatigue Life ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Resistance Spot

Resistance spot welding macro characteristics of the dissimilar thickness dual phase steels

2014 ◽  
Vol 63 ◽  
pp. 151-158 ◽  
Author(s):  
Hongqiang Zhang ◽  
Xiaoming Qiu ◽  
Yang Bai ◽  
Fei Xing ◽  
Haiyan Yu ◽  
...  
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Resistance Spot ◽  
Dissimilar Thickness

Clinching of Dual-Phase Steels as an Alternative to Resistance Spot Welding

2018 ◽  
Vol 919 ◽  
pp. 68-77
Author(s):  
Ľuboš Kaščák ◽  
Emil Spišák ◽  
Janka Majerníková ◽  
René Kubík
Keyword(s):  
Bearing Capacity ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase ◽  
Load Bearing Capacity ◽  
Dual Phase Steels ◽  
Load Bearing ◽  
Car Body ◽  
Resistance Spot ◽  
Body Production

Resistance spot welding is the dominant method for joining the materials in the car body production. Progressive materials are being developed to improve the car’s fuel consumption and the safety of passengers as well. Advanced high strength dual-phase steels are such materials. Despite of the dominancy of resistance spot welding in car body production, innovative methods are being developed to reduce the joining time, process costs and improve the load-bearing capacity of a particular joint. Mechanical clinching is such process. The research focused on the evaluation of the possibility of clinching as an alternative method to the resistance spot welding. Experimental samples were prepared from dual-phase steel sheets DP600. The samples were tested by uniaxial tensile test, microhardness test and metallographic observations. Both joining methods have advantages and disadvantages which could destine them for specific utilization. Clinching joining is a progressive, fast and low-cost technique, but the joint’s load-bearing capacity is lower when compared to resistance spot weld.

scholarly journals Characteristics of the Resistance Spot Welding Joints in Dissimilar Thickness Dual-phase Steels

2015 ◽  
Vol 55 (9) ◽  
pp. 2002-2007 ◽  
Author(s):  
Jingwei Liang ◽  
Hongqiang Zhang ◽  
Xiaoming Qiu ◽  
Yanan Shi
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Resistance Spot ◽  
Welding Joints ◽  
Dissimilar Thickness

Research on Resistance Spot Welding of DP980 Dual Phase Steel

2013 ◽  
Vol 860-863 ◽  
pp. 780-783
Author(s):  
Qiao Bo Feng ◽  
Yun Feng Zhu ◽  
He Xin Zhao
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Welding Current ◽  
High Resistivity ◽  
Dual Phase ◽  
Welding Joint ◽  
Resistance Spot ◽  
Electrode Force

The process parameters and quality of resistance spot welding for DP980 dual phase steel were studied through the orthogonal experiment method, and the influence of welding current, welding time and electrode force on the strength of welding joint has been discussed. The results show that the welding current has the greatest influence on the quality of welding joint for DP980 dual phase steel, and it needs relatively lower welding current for the DP980 dual phase steel as it has high resistivity, and appropriate increasing of electrode force is a feasible way to avoid the defect of shrinkage and it improves the joint strength.

scholarly journals MULTI-OBJECTIVE OPTIMIZATION OF THE RESISTANCE SPOT-WELDING PROCESS PARAMETERS FOR THE WELDING OF DUAL-PHASE STEEL DP500

2021 ◽  
Vol 55 (2) ◽  
pp. 201-206
Author(s):  
Aleksija Djuric ◽  
Dragan Milčić ◽  
Damjan Klobčar ◽  
Biljana Marković
Keyword(s):  
Automotive Industry ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Mechanical Characteristics ◽  
Welding Process ◽  
Dual Phase ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Resistance Spot

Resistance spot welding (RSW) is still the most used form of welding in the automotive industry, primarily for welding steel. One of the advanced steels used in the automotive industry is dual-phase steel, so it is important to properly select the welding parameter for these steels. Therefore, this paper presents multi-objective optimization in the RSW welding process of DP 500 steel. The paper considers three different mechanical characteristics i.e., the failure load (F), failure displacement (l) and weld nugget diameter (D), as all these welding characteristics play significant roles in evaluating the quality of spot welding. The results show that the welding current is the most influential parameter with respect to the mechanical characteristics. The effect of welding time on the weld quality is the least significant. The optimal parameters for welding DP 500 steel obtained in this paper are weld current 8 kA, electrode force 4.91 kN and weld time 400 ms.

Effect of Electrode Force on Expulsion in Resistance Spot Welding with Initial Gap

2011 ◽  
Vol 675-677 ◽  
pp. 795-798 ◽  
Author(s):  
Jie Shen ◽  
Yan Song Zhang ◽  
Xin Min Lai
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Sheet Thickness ◽  
Carbon Steels ◽  
Dual Phase ◽  
Low Carbon ◽  
Resistance Spot ◽  
Steel Sheets ◽  
Electrode Force ◽  
Joint Quality

Compared with the conventional low carbon steels, the expulsion is more prone to occur in resistance spot welding (RSW) of dual phase (DP) steels. Especially when the initial gap exists between the steel sheets, the weld expulsion would reduce the weld quality of the joint. It is important to decrease or inhibit the occurrence of the weld expulsion in auto-body assembly line in order to guarantee the joint quality. In this study, the experiments of RSW with different initial gaps have been done to study the effect of the electrode force on the expulsion using different thicknesses of dual phase steels. The results show that the increment of the electrode fore would enable to decrease the occurrence of expulsion with the increase of the sheet thickness and gap spacing in resistance spot welding of DP steel sheets.

Welding parameters influence on fatigue life and microstructure in resistance spot welding of 6061-T6 aluminum alloy

2013 ◽  
Vol 45 ◽  
pp. 456-465 ◽  
Author(s):  
R.S. Florea ◽  
D.J. Bammann ◽  
A. Yeldell ◽  
K.N. Solanki ◽  
Y. Hammi
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Parameters ◽  
Resistance Spot

scholarly journals Effect of post-weld tempering treatment on performance of DP600 spot welded joint

2021 ◽  
Vol 66 (3) ◽  
pp. 125-136
Author(s):  
Li Hong ◽  
Liu Xusheng ◽  
Wang Bing ◽  
Li Zhuoxin
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
The Body ◽  
Weld Nugget ◽  
Vehicle Body ◽  
Material Strength ◽  
Dual Phase ◽  
Resistance Spot ◽  
Tempering Treatment

In order to meet the increasing requirements of the automotive industry for material strength grades and performance, the application of advanced highstrength steel automotive panels, represented by dual-phase steel, in lightweight vehicle bodies is increasing. Resistance spot welding is the main joining process for vehicle body manufacturing. How to improve the tensile strength and fatigue performance of dual-phase steel resistance spot welding joints is of great significance to the welding structure of the body. In this paper, resistance spot welding of cold rolled DP600 dual phase steel in the welding current range of 9000A-12000A was carried out. The effects of post-weld tempering treatment on microstructure, microhardness, shearing and fatigue of joints were compared. The results show that the microstructure transformation occurs in the weld nugget area after post-weld tempering, and the tempered martensite appears to reduce the microhardness of the weld nugget area; the nugget diameters, tensile-shear strength and failure energy are all higher than those without tempering treatment; tempering improves the fatigue strength of the spot joints, and regardless of whether the welded joints are tempered, cracks are all generated near the heat affected zone of the joint after fatigue test.

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