MCDM Optimization of Characteristics in Resistance Spot Welding for Dissimilar Materials Utilizing Advanced Hybrid Taguchi Method-Coupled CoCoSo, EDAS and WASPAS Method

2021 ◽  
pp. 475-490
Author(s):  
Dilip Kumar Bagal ◽  
Antarjyami Giri ◽  
Ajit Kumar Pattanaik ◽  
Siddharth Jeet ◽  
Abhishek Barua ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Resistance Spot

Resistance Spot Welding in Non-Combustible Magnesium Alloy

2020 ◽  
Author(s):  
Xuanyi Shao ◽  
Yukio Miyashita ◽  
Duriyathep Panwised ◽  
Rattana Borrisutthekul
Keyword(s):  
Magnesium Alloy ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Shear Test ◽  
Dissimilar Materials ◽  
Maximum Load ◽  
Tensile Shear ◽  
Similar Material ◽  
Resistance Spot ◽  
Surface Polishing

Abstract Resistance spot welding (RSW) was applied to non-combustible magnesium alloy, AX41 (Mg-4%Al-1%Ca) to investigate its weldability. The similar material joint of AX41 and dissimilar materials joint between AX41 and aluminum alloy, AA6061 were welded. Tensile shear test was carried out to evaluate joining strength in the similar and dissimilar materials RSW joints. In case of similar material joints, the maximum load obtained with tensile shear test in AX41 similar material joint was higher than that obtained in AA6061 similar material joint. Moreover, higher maximum load was obtained in a similar material joint without surface polishing compared to joint welded with surface polishing in AX41. In case of the dissimilar materials joint, the maximum load obtained was almost comparable with AX41 similar material joint, however scatter in joint strength was large. Weldability of the dissimilar materials joint became poor by applying surface polishing.

EVOLUTION OF INTERFACIAL MICROSTRUCTURE DURING RESISTANCE SPOT WELDING OF CU AND AL WITH AND NI-P COATING

2021 ◽  
pp. 1-12
Author(s):  
Nannan Chen ◽  
Hongliang Wang ◽  
Jingjing Li ◽  
Vic Liu ◽  
James Schroth
Keyword(s):  
Heat Input ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Kirkendall Effect ◽  
Interfacial Microstructure ◽  
Formation Mechanisms ◽  
Elemental Distribution ◽  
Resistance Spot ◽  
State Diffusion

Abstract Dissimilar materials of copper (Cu) to aluminum (Al) with nickel-phosphorus (Ni-P) coatings were joined using resistance spot welding. The Ni-P coatings were electroless plated on the Al surfaces to eliminate the formation of brittle Cu-Al intermetallic compounds (IMCs) at the faying interface of Cu to Al. Three welding schedules with various heat input were employed to produce different interfacial microstructure. The evolution of interfaces in terms of phase constitution, elemental distribution and defects (gaps and voids) was characterized and the formation mechanisms were elucidated. During the welding, the bonding between Cu and Ni-P form through solid-state diffusion, while the faster diffusion rate of Cu relative to Ni and P atoms promotes the generation of sub-micro voids. As the heat input increases, gaps at the Cu/Ni-P interface diminishes accompanied by increase of sub-micro voids. A moderate schedule helps to remove the gaps and inhibit the voids formation. An Al3Ni layer and nanovoids were found around the interface of Ni-P/Al. The increased heat input decreases the grain size of Al3Ni at the interface by eutectic remelting and increases the nanovoids by enhanced nanoscale Kirkendall effect.

scholarly journals STUDI LITERATUR PENGARUH PARAMETER PENGELASAN TERHADAP SIFAT FISIK DAN MEKANIK PADA LAS TITIK (RESISTANCE SPOT WELDING)

ROTASI ◽  
2013 ◽  
Vol 15 (2) ◽  
pp. 44
Author(s):  
Haikal Haikal ◽  
Triyono Triyono
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Electric Current ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Dissimilar Metals ◽  
Welding Time ◽  
Resistance Spot ◽  
Nugget Diameter

Resistance spot welding (RSW) is the most widely used for joining thin sheet metals in automotive industry. Various applications of dissimilar materials and thicknesses were commonly found in many spot welding processes especially in the manufacture of car body. The resistance spot welding of dissimilar materials are generally more challenge than similar materials due to differences in the physical, chemical, and mechanical properties of the base metals. Differences of materials have an impact on heat input generated at the spot welding. Diameter of the weld nugget size is influenced by several parameters such as electric current, welding time, different types of material, and the thickness of the plate. Nugget diameter will influence on physical and mechanical properties weld such as microstructure, shear strength and hardness. For practical use, various industrial standards have recommended a minimum weld size for a given sheet thickness, mostly in the form of tables. For example the American Welding Society (AWS), Society of Automotive Engineering (SAE) and the American National Standards Institute (ANSI). They were only suitable to be apllied on the similar metal and thickness joint because in this joint, symetrical nugget will be formed. Meanwhile a type of dissimilar metal that joined by spot welding method will result in the asymetrical nugget. This paper aims to review the results of researchs on the similar and dissimilar resistance spot welded joint to evaluate the use of similar metals weld parameters and standards on the dissimilar metals weld. It was determined that parameters welding such as electric current, welding time, and the standard for similar metals weld can not be applied on the dissimilar metals weld. The asymetrical nugget shape decreased shear strength on the weld nugget. The most important factor that was considered on the dissimilar metals weld to make high quality weld joint was nugget diameter. If the nugget diameter weld increased the strength of welding will increase.

Analyses of Strategies and Problems in Resistance Spot Welding of Dissimilar Materials

2014 ◽  
Vol 490-491 ◽  
pp. 315-318
Author(s):  
Nan Nan Wang ◽  
Ran Feng Qiu ◽  
Yang Chun Liu ◽  
Shuai Ma ◽  
Juan Wang ◽  
...  
Keyword(s):  
High Resistance ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Cover Plate ◽  
Low Resistance ◽  
Resistance Spot ◽  
Titanium Aluminum

In this paper, the method of resistance spot welding with cover plate was proposed to weld the materials combination of the metal with high resistance and the metal with low resistance, such as steel/aluminum, titanium/aluminum, titanium/magnesium, and steel/magnesium; and the technique of resistance spot welding with insert sheet was proposed to weld dissimilar materials with low resistance and to weld dissimilar materials with high resistance.

scholarly journals Numerical analysis on coaxial one-side resistance spot welding of Al5052 and CFRP dissimilar materials

2020 ◽  
Vol 188 ◽  
pp. 108442
Author(s):  
Sendong Ren ◽  
Yunwu Ma ◽  
Shuhei Saeki ◽  
Yoshiaki Iwamoto ◽  
Ninshu Ma
Keyword(s):  
Numerical Analysis ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Resistance Spot ◽  
Side Resistance

Multi-Response Optimization Using Taguchi Method of Resistance Spot Welding Parameters

2014 ◽  
Vol 660 ◽  
pp. 120-124 ◽  
Author(s):  
Farizah Adliza Ghazali ◽  
Yupiter HP Manurung ◽  
Mohamed Ackiel Mohamed
Keyword(s):  
Shear Strength ◽  
Taguchi Method ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Signal To Noise Ratio ◽  
Welding Parameter ◽  
Welding Parameters ◽  
Resistance Spot ◽  
Electrode Force ◽  
Weld Current

This paper presents the effects of spot welding parameters on multi-response weld quality and optimizes the governing parameters of Resistance Spot Welding (RSW) towards the tensile shear strength and nugget size using Taguchi method. The main affecting welding parameters such as electrode force, weld time and weld current were determined as the basis for quality evaluation. The selected quality features were classified into shear strength and nugget size which were required for application with highly dynamic loading. The optimum welding parameter was obtained using multi signal-to-noise ratio (MSNR) and the significant level of welding parameters was further analysed using analysis of variance (ANOVA). Based on the results, electrode force was found to be most effective parameter affecting shear strength and nugget size. The experiment was conducted at optimum welding parameter and validated the used of multi-objective Taguchi method for enhancing performance and optimizing the welding parameters in RSW process.

scholarly journals Resistance Spot Welding of Dissimilar Materials of Austenitic Stainless Steels and IF (Interstitial Free) Steels

2009 ◽  
Vol 19 (7) ◽  
pp. 369-375 ◽  
Author(s):  
Jin-Bum Lee ◽  
Dae-Geun Nam ◽  
Nam-Hyun Kang ◽  
Yang-Do Kim ◽  
Weon-Tae Oh ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Austenitic Stainless Steels ◽  
Interstitial Free ◽  
Resistance Spot

scholarly journals Optimization of the Process Parameters of Resistance Spot Welding of AISI 316l Sheets Using Taguchi Method

2019 ◽  
Vol 23 (1) ◽  
pp. 64-69
Author(s):  
P. Muthu
Keyword(s):  
Shear Stress ◽  
Taguchi Method ◽  
Process Parameters ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Sheet Thickness ◽  
Experimental Investigations ◽  
Tensile Shear ◽  
Optimal Process ◽  
Resistance Spot

Abstract Resistance spot welding (RSW) is a fabrication process that is being used in the automobile and aerospace industry since many years for joining low carbon or “mild” steel. Quality and strength of the welds depend upon the process parameters of RSW. The most effective parameters in this process are: current intensity, welding time, sheet thickness and material, geometry of electrodes, electrode force, and current shunting. This paper presents the experimental investigations for the optimization of tensile shear stress of RSW for stainless steel grade 316L sheets by using Taguchi method. The experiments were conducted using Taguchi’s L27 orthogonal array under varying process parameters, namely electrode diameter, welding current, and heating time. The experimental data were analyzed using signal-to-noise ratio (S/N ratio) to find the optimal process parameters. Analysis of variance (ANOVA) and F test were used to find the most significant parameters affecting the spot weld quality characteristics. Confirmation tests with optimal process parameters were conducted to validate the test results. From the results, it was found that it is possible to increase tensile shear stress significantly.

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