The effects of electrode force, welding current and welding time on the resistance spot weldability of pure titanium

Kaya, Yakup; Kahraman, Nizamettin

doi:10.1007/s00170-011-3604-z

Cited by 39 publications

(12 citation statements)

References 24 publications

(40 reference statements)

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“…Resistance spot welding is the most widely used method in the joining of thin metal sheets due to its high effeciency and high degree of automation, in which a small weld is formed between two metal workpieces through localized melting due to interfacial resistance heating. The present study revealed that the spot resistance welding of titanium alloys to themselves and to other materials was successfully performed [ 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 ]. Especially, the interfacial microstructure mainly consisted of TiAl 3 intermetallics when the the titanium alloys were spot resistance welded to aluminium alloys [ 116 , 120 ], which indicated the possibility of spot resistance welding of titanium aluminides.…”

Section: Joining Of Titanium Aluminides By Other Methodsmentioning

confidence: 99%

Welding and Joining of Titanium Aluminides

Cao

Song

et al. 2014

Materials

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Welding and joining of titanium aluminides is the key to making them more attractive in industrial fields. The purpose of this review is to provide a comprehensive overview of recent progress in welding and joining of titanium aluminides, as well as to introduce current research and application. The possible methods available for titanium aluminides involve brazing, diffusion bonding, fusion welding, friction welding and reactive joining. Of the numerous methods, solid-state diffusion bonding and vacuum brazing have been most heavily investigated for producing reliable joints. The current state of understanding and development of every welding and joining method for titanium aluminides is addressed respectively. The focus is on the fundamental understanding of microstructure characteristics and processing–microstructure–property relationships in the welding and joining of titanium aluminides to themselves and to other materials.

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Section: Joining Of Titanium Aluminides By Other Methodsmentioning

confidence: 99%

Welding and Joining of Titanium Aluminides

Cao

Song

et al. 2014

Materials

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“…As a traditional welding technique, resistance spot welding could isolate atmospheric gases effectively through electrode force implementation. Kaya and Kahraman [4] found that resistance spot welding was an effective welding process for 1.5 mm pure titanium sheets.…”

Section: Introductionmentioning

confidence: 99%

Multi-response optimization in small scale resistance spot welding of titanium alloy by principal component analysis and genetic algorithm

Wan

Wang

Zhao

2015

Int J Adv Manuf Technol

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The present study aims to solve multi-response optimization problem in small scale resistance spot welding of 0.4-mm-thick TC2 titanium alloy sheets. Welding parameters of electrode force, welding current and welding time were arranged by the central composite experimental design. Principal component analysis was conducted first on quality indicators of nugget diameter, failure load, failure displacement and failure energy. Different weighted principal components selection strategies were performed to calculate the composite weld quality indexes. Multiple stepwise regression analysis was applied to develop the mathematical function for weighted principal components prediction. Welding parameters effects and sensitivity analysis on the composite weld quality index were discussed. Welding current was found the most significant factor affecting weld quality. Optimum welding parameters determined by genetic algorithm were validated through experiments. The first principal component was supposed as the most effective and simplest quality index. Weld quality was considerably improved based on the proposed model.

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“…The variation in microhardness is ascribed to the different microstructures. The formation of martensite increases the microhardness in the WN 15 and grain coarsening softens the HAZ. As discussed above, because of the heat concentration that occurs when microjoining ultrathin foils, no obvious phase transformation takes place in the HAZ compared with LSRSW.…”

Section: Results and Analysismentioning

confidence: 99%

Effect of weld nugget size on failure mode and mechanical properties of microscale resistance spot welds on Ti–1Al–1Mn ultrathin foils

Chen

Sun

et al. 2018

Advances in Mechanical Engineering

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We use tensile-shear tests to investigate the failure modes of Ti-1Al-1Mn microscale resistance spot welds and to determine how the failure mode affects the microstructure, microhardness profile, and mechanical performance. Two different failure modes were revealed: interfacial failure mode and pullout failure mode. The welds that fail by pullout failure mode have much better mechanical properties than those that fail by interfacial failure mode. The results show that weld nugget size is also a principal factor that determines the failure mode of microscale resistance spot welds. A minimum weld nugget size exists above which all specimens fail by pullout failure mode. However, the critical weld nugget sizes calculated using the existing recommendations are not consistent with the present experimental results. We propose instead a modified model based on distortion energy theory to ensure pullout failure. Calculating the critical weld nugget size using this model provides results that are consistent with the experimental data to high accuracy.

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The effects of electrode force, welding current and welding time on the resistance spot weldability of pure titanium

Cited by 39 publications

References 24 publications

Welding and Joining of Titanium Aluminides

Welding and Joining of Titanium Aluminides

Multi-response optimization in small scale resistance spot welding of titanium alloy by principal component analysis and genetic algorithm

Effect of weld nugget size on failure mode and mechanical properties of microscale resistance spot welds on Ti–1Al–1Mn ultrathin foils

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