Microstructure and Tensile-Shear Properties of Resistance Spot-Welded Medium Mn Steel

Jia, Qiang; Liu, Lei; Guo, Wei; Peng, Yun; Zou, Guisheng; Tian, Zhiling; Zhou, Y.

doi:10.3390/met8010048

Cited by 40 publications

(30 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Emerging methods of manufacturing, new technologies in materials production [ 1 , 2 , 3 , 4 , 5 ], and new modeling techniques result in more and more complex machines, subassemblies, and shapes of structural elements in use [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Both the designed structures and the materials used for its manufacturing should fulfill strict standards and expected demands to provide safe operation.…”

Section: Introductionmentioning

confidence: 99%

“…In the area of the material production still, new materials are issued, starting from very modern composite materials and ending with the new steel alloys [ 1 , 2 , 3 , 4 , 5 , 38 , 39 ]. The introduction of new materials is accompanied by the development of the more and more complex material models [ 40 ] and fatigue criteria [ 41 , 42 ], which better and better describe the material and structure response under the applied load systems [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of DIC Method in the Analysis of Stress Concentration and Plastic Zone Development Problems

2020

View full text Add to dashboard Cite

The paper presents the assessment of the possibility and reliability of the digital image correlation (DIC) system for engineering and scientific purposes. The studies were performed with the use of samples made of the three different materials—mild S235JR + N steel, microalloyed fine‑grain S355MC steel, and high strength 41Cr4 steel subjected to different heat‑treatment. The DIC studies were focused on determinations of dangerous zones with large stress concentrations, plastic deformation growth, and prediction of the failure zone. Experimental tests were carried out for samples with different notches (circular, square, and triangular openings). With the use of the DIC system and microstructure analyses, the influence of different factors (laser cutting, heat treatment, material type, notch shape, and manufacturing quality) on the material behavior were studied. For all studied cases, the stress concentration factors (SCF) were estimated with the use of the analytical formulation and the finite element analysis. It was observed that the theoretical models for calculations of the influence of the typical notches may result in not proper values of SCFs. Finally, the selected results of the total strain distributions were compared with FEM results, and good agreement was observed. All these allow the authors to conclude that the application of DIC with a common digital camera can be effectively applied for the analysis of the evolution of plastic zones and the damage detection for mild high‑strength steels, as well as those normalized and quenched and tempered at higher temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of DIC Method in the Analysis of Stress Concentration and Plastic Zone Development Problems

2020

View full text Add to dashboard Cite

show abstract

“…In this paper, a novel refill technique is developed for friction stir spot welding (FSSW) using resistance spot welding (RSW), which is a popular manufacturing method in aerospace and automotive industries [16,17]. To demonstrate the validity of the technique, it is first applied to refill the keyhole created through FSSW of 1.5 mm thick AA2024 aluminum sheets.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Fracture Behavior of Refill Friction Stir Spot Welded Joints of AA2024 Using a Novel Refill Technique

Deng

et al. 2019

Metals

View full text Add to dashboard Cite

Keyhole at the end of a conventional friction stir welded (FSW) joint is one of the major concerns in certain applications. To address this issue, a novel keyhole refilling technique was developed for conventional friction stir spot welding (FSSW) using resistance spot welding (RSW). A three-phase secondary rectifier resistance welder was adapted for the refill of the keyhole in the 1.5 mm + 1.5 mm friction stir spot welded 2024-T4 aluminum alloy joint. The microstructure and tensile shear fracture behavior were compared for both the unfilled and refilled specimens. The results show that the plug and keyhole are dominated by solid state welding with some localized zones by fusion welding. The refill process significantly improved the maximum load capacity in tensile shear testing as the corona ring is enlarged leading to a larger bonding area. Moreover, the tensile shear fracture occurs in the refilled FSSW specimens at the corona bonding zone, while the fracture occurs at the hook zone in the unfilled keyhole.

show abstract

“…Therefore, by adopting a rectangular terminal electrode, the electrode adhesion and splashing can be effectively reduced, and the connection strength of RSW joint can be increased. However, the welding current [11][12][13], pressure [14], time [15,16], and other parameters [17][18][19][20][21] in the RSW process have significant influence on the nugget dimensions and metallographic morphology of RSW joints. Compared with the traditional electrode, the distribution of welding current and welding pressure in the rectangular terminal electrode is much more complicated [22], which means that the welding parameters have more obvious influence on the nugget dimensions and metallographic morphology.…”

Section: Introductionmentioning

confidence: 99%

Connection Status Research of the Resistance Spot Welding Joint Based on a Rectangular Terminal Electrode

Zhang

Wei

et al. 2019

Metals

View full text Add to dashboard Cite

Rectangular terminal electrode is adopted in this research to conduct a resistance spot welding (RSW) process on stainless steel plate. The connection status of RSW joints under different welding current, time, and pressure were studied, and revealed how the rectangular terminal electrode shape and its dimensions influence the RSW joint dimensions. The process analysis results showed that the RSW nuggets welded with rectangular terminal electrode are normally elliptical in shape, and the dimensions of the long axis direction and the short axis direction have a certain proportion. As the welding current increases, the nuggets dimensions in long direction increase first and then decrease, and the internal grain structure also varies. As the welding time increases, the nugget size in long direction increase first and then steady and rarely splash occurs. As the welding pressure increase, the nugget dimensions in long direction increase first and then decrease, and the splash easily occurs under large welding pressure. However, when the welding pressure is too small, the unique adjacent double fusion nugget formed. By adopting proper welding parameters, the nugget size and quality can be controlled. This provides an important basis for the application of rectangular terminal electrode in RSW welding process.

show abstract

Microstructure and Tensile-Shear Properties of Resistance Spot-Welded Medium Mn Steel

Cited by 40 publications

References 25 publications

Application of DIC Method in the Analysis of Stress Concentration and Plastic Zone Development Problems

Application of DIC Method in the Analysis of Stress Concentration and Plastic Zone Development Problems

Microstructure and Fracture Behavior of Refill Friction Stir Spot Welded Joints of AA2024 Using a Novel Refill Technique

Connection Status Research of the Resistance Spot Welding Joint Based on a Rectangular Terminal Electrode

Contact Info

Product

Resources

About