Composite test specimen for all-dimensional direct observation of metal material penetration fusion welding micropores

Abstract

The invention provides a composite test specimen for all-dimensional direct observation of metal material penetration fusion welding micropores. The composite test specimen comprises an upper metal test specimen body and a lower GG17 test specimen body, the top face of the whole composite test piece, namely the top face of the metal test specimen body is a plane, the bottom face of the metal testspecimen body and the top face of the GG17 test specimen body are smooth binding faces, and an included angle of n degrees is formed between the binding face of the metal test specimen body and the GG17 test specimen body and top face of the composite test specimen, wherein n is larger than 0 degree and smaller than 90 degrees. The composite test specimen can be used for all-dimensional direct observation of shapes of the metal material penetration fusion welding micropores and all-dimensional direct observation of plasma in the micropores, observation dead corners do not exist, more precise micropore shapes are provided for study of micropore behaviors and energy absorption mechanisms in the micropores, and accurate in-pore plasma parameters are also provided for study of inverse bremsstrahlung absorption of the plasma.

Description

technical field [0001] The invention relates to the field of deep penetration welding, in particular to a composite test piece for omnidirectional direct observation of small holes of deep penetration welding of metal materials. Background technique [0002] As a high-quality and efficient welding method, deep penetration welding (including laser, electron beam, etc.) has the advantages of fast welding speed, large weld depth-to-width ratio, small heat-affected zone and welding deformation, and is widely used in steel, nuclear power, aerospace, etc. It has been more and more widely used in major military and civil projects such as railway transportation, automobile, electronic industry, etc., especially in the lightweight of transportation vehicles (welding of thin-walled components and lightweight materials such as aluminum and magnesium alloys). play an increasingly important role. [0003] (1) Current status of small hole observation technology [0004] The essential fe...

AI Technical Summary

Problems solved by technology

However, this method has a significant disadvantage: the metal film layer used for welding is a loose structure, which is very different from the actual situation of the dense workpiece used for welding, because the loose multi-layer aluminum film has a deep impact on the laser. The influence of heat transfer, mass transfer and laser energy absorption and transmission process in the fusion welding process is very different from the dense aluminum alloy materials used in engineering practice. The actual situation of the material is very different

[0011] To sum up, in the prior art, there is neither a device and method that can directly observe the shape of the small hole in the deep penetration welding of the metal material, nor a method that can directly observe the shape of the small hole in the deep penetration welding of the metal material. There is no device and method for direct observation of plasma distribution in all directions, and there is also no composite test piece that can be used for direct observation of small holes in deep penetration welding of metal materials.

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