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Cold welding

About: Cold welding is a research topic. Over the lifetime, 2744 publications have been published within this topic receiving 33413 citations. The topic is also known as: cold pressure welding & contact welding.


Papers
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Journal ArticleDOI
TL;DR: In this article, the microstructural changes effected by friction stir welding of 7075 Al. were evaluated and the authors concluded that friction-stir welding has the potential to avoid significant changes in microstructure and mechanical properties.

819 citations

Journal ArticleDOI
01 Aug 1974
TL;DR: The mechanical alloying process as mentioned in this paper is an entirely solid state process, permitting dispersion of insoluble phases such as refractory oxides and addition of reactive alloying elements such as aluminum and titanium.
Abstract: The mechanical alloying process is a new method for producing composite metal powders with controlled microstructures. It is unique in that it is an entirely solid state process, permitting dispersion of insoluble phases such as refractory oxides and addition of reactive alloying elements such as aluminum and titanium. Interdispersion of the ingredients occurs by repeated cold welding and fracture of free powder particles. Refinement of structure is approximately a logarithmic function of time, and depends on the mechanical energy input to the process and work hardening of the materials being processed. A condition of steady state processing is eventually achieved marked by saturation (constant) hardness and constant particle size distribution, although structural refinement continues. Evidence of this is presented, and the nature of the cold welding and characteristics of the processed powder are described.

570 citations

Journal ArticleDOI
Fehim Findik1
TL;DR: Explosion welding (EXW) is one of the joining methods consisting of a solid state welding process in which controlled explosive detonation on the surface of a metal is produced to remove away the impurities on the metal surfaces as mentioned in this paper.

485 citations

Journal ArticleDOI
TL;DR: It is demonstrated that single-crystalline gold nanowires with diameters between 3 and 10 nm can be cold-welded together within seconds by mechanical contact alone, and under relatively low applied pressures.
Abstract: The welding of metals at the nanoscale is likely to have an important role in the bottom-up fabrication of electrical and mechanical nanodevices. Existing welding techniques use local heating, requiring precise control of the heating mechanism and introducing the possibility of damage. The welding of metals without heating (or cold welding) has been demonstrated, but only at macroscopic length scales and under large applied pressures. Here, we demonstrate that single-crystalline gold nanowires with diameters between 3 and 10 nm can be cold-welded together within seconds by mechanical contact alone, and under relatively low applied pressures. High-resolution transmission electron microscopy and in situ measurements reveal that the welds are nearly perfect, with the same crystal orientation, strength and electrical conductivity as the rest of the nanowire. The high quality of the welds is attributed to the nanoscale sample dimensions, oriented-attachment mechanisms and mechanically assisted fast surface-atom diffusion. Welds are also demonstrated between gold and silver, and silver and silver, indicating that the technique may be generally applicable.

451 citations

Journal ArticleDOI
TL;DR: A review of different fusion-bonding methods for thermoplastic composite components and present recent developments in this area is presented in this article, where various welding techniques and corresponding manufacturing methodologies, the required equipment, the effects of processing parameters on weld performance and quality, the advantages/disadvantages of each technique, and the applications are described.
Abstract: Joining of thermoplastic composites is an important step in the manufacturing of aerospace thermoplastic composite structures. Therefore, several joining methods for thermoplastic composite components have been under investigation and development. In general, joining of thermoplastic composites can be categorized into mechanical fastening, adhesive bonding, solvent bonding, co-consolidation, and fusion bonding or welding. Fusion bonding or welding has great potential for the joining, assembly, and repair of thermoplastic composite components and also offers many advantages over other joining techniques. The process of fusion-bonding involves heating and melting the polymer on the bond surfaces of the components and then pressing these surfaces together for polymer solidification and consolidation. The focus of this paper is to review the different fusion-bonding methods for thermoplastic composite components and present recent developments in this area. The various welding techniques and the corresponding manufacturing methodologies, the required equipment, the effects of processing parameters on weld performance and quality, the advantages/disadvantages of each technique, and the applications are described.

396 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202216
202120
202034
201944
201852