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Filler metal

About: Filler metal is a research topic. Over the lifetime, 11152 publications have been published within this topic receiving 86590 citations.


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Patent
09 Jun 1969
TL;DR: In this article, a plasma arc welding torch is characterized in that the head is divided into two sections, each section carrying a different electrical potential, the sections separated by a combination electrical insulator and sealing member.
Abstract: A plasma arc welding torch suitable for welding materials of construction. The torch is characterized in that the head is divided into two sections, each section carrying a different electrical potential, the sections separated by a combination electrical insulator and sealing member. The sealing expedient is effected by coating the opposite sides of the insulator with a metal layer and brazing each of the opposing layers to metal members associated with the two sections of the torch. There is further provided a collar for electrically insulating the torch tip from the nozzle and at the same time serving to aid in dissipating heat generated at the tip.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the mechanical and metallurgical properties of the joint between AZ31B and A7075-T651 alloys welded by a new technique called gas metal arc plug welding method.
Abstract: Innovative welding techniques allow for the fabrication of light, high-specific-strength, and fuel-saving Al and Mg alloys for use in transportation industries. Furthermore, these techniques have minimal detrimental impact on the environment. However, the poor mechanical properties of joints resulting from the formation of brittle Al m Mg n intermetallic compounds are key barriers to joining Al and Mg alloys. To date, a proper solution to this problem has not yet been provided. The aim of this research was to investigate the mechanical and metallurgical properties of the joint between AZ31B and A7075-T651 alloys welded by a new technique called gas metal arc plug welding method. ER5356 aluminum wire was used as a filler. The yield and ultimate tensile strengths as well as impact toughness of the joints were measured. The fracture surface was investigated by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The maximum ultimate tensile strength and impact toughness of the joints were 89 and 84 % of those of the AZ31B parent alloy, respectively. Generally, the joints failed in the ER5356 nugget, whereas some failed in the AZ31B alloy. No fracture was observed in the A7075-T65 alloy. Brittle fracture mechanism was observed for all the joints. In conclusion, the proposed welding technique can allow for better mechanical properties of joints for dissimilar welding of aluminum and magnesium alloys.

34 citations

Journal ArticleDOI
Xiao Wang1, Chunxing Gu1, Yuanyuan Zheng1, Zongbao Shen1, Huixia Liu1 
TL;DR: In this article, a series of laser shock welding experiments were conducted to verify the welding ability of aluminum/aluminum and aluminum/copper plates, including linear and wavy interfaces.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of surface preparation of the base metal and of the load applied to the joint during brazing on the strength of brazed joints was investigated, and it was found that the smoother the surface finish of the copper base metal, the higher the joint shear strength attained.

34 citations

Journal ArticleDOI
TL;DR: In this paper, five laser-based welding techniques are compared for their gap bridging capabilities: single-spot laser welding, twin-spot welding, single spot laser welding with cold wire feeding, single-Spot laser welding without filler wire and laser/GMA hybrid welding, where the results show that the use of a filler wire is indispensable to increase the gap tolerance.
Abstract: Laser welding has a large potential for the production of tailor welded blanks in the automotive industry, due to the low heat input and deep penetration. However, due to the small laser spot and melt pool, laser-based welding processes in general have a low tolerance for seam gaps. In this paper, five laser-based welding techniques are compared for their gap bridging capabilities: single-spot laser welding, twin-spot laser welding, single-spot laser welding with cold wire feeding, twin-spot laser welding with cold wire feeding and laser/GMA hybrid welding. Welding experiments were performed on 1.1- and 2.1-mm-thick AA5182 aluminium sheets. The resulting welds were evaluated using visual inspection, cross sectional analysis with optical microscopy, tensile tests and Erichsen Cupping tests. The results show that the use of a filler wire is indispensable to increase the gap tolerance. A proper alignment of this wire with the laser spot(s) is crucial. With the single spot laser welding with cold wire feeding, a gap up to 0.6 mm could be bridged as opposed to a maximum allowable gap width of 0.2 mm for single-spot laser welding without filler wire. For 2.1-mm-thick sheets, the laser/GMA hybrid welding process can bridge even gaps up to 1.0 mm. Most welds had a high tensile strength. However, during Erichsen Cupping tests, the deformation of the welds is significantly lower as compared to the base material

34 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202379
2022127
2021178
2020291
2019329
2018320