Full
Outline
Ultra-thin metal plate welding presents several formidable challenges， including a high susceptibility to deformation， difficulties in precisely controlling weld depth， and significant fluctuations in joint performance. Traditional welding methods frequently fall short in overcoming these obstacles to achieve high-quality welds. To overcome the limitations inherent in conventional welding processes， the constrained tungsten inert gas （TIG） arc welding technique is adopted. A comprehensive and comparative analysis is conducted on the weld quality and performance of three ultra-thin metals： 304 stainless steel， 5052 aluminum alloy， and T2 copper. Through in-depth metallurgical analysis， the microstructure of the welds is thoroughly examined. Moreover， laser confocal microscopy is utilized to quantitatively characterize the weld morphology and surface roughness. Tensile tests and the four-point probe method are employed to assess the mechanical properties and electrical conductivity of the welds， respectively. The results demonstrate that the constrained TIG arc welding process successfully achieve stable welding for all three ultra-thin metal materials， yielding well-formed welds with relatively excellent mechanical properties. A comparative analysis of the tensile strength of the welded joints reveal that the tensile strength of 304 stainless steel welds can reach 90% of that of the base material， while the tensile strengths of 5052 aluminum alloy and T2 copper welds are approximately 50% of the base material’s. Metallurgical examination show no obvious defects in the welds of 304 stainless steel and T2 copper， but minor undercutting is detected in the 5052 aluminum alloy welds. Conductivity tests indicate only a slight increase in weld resistivity compared to the base material， which still satisfies application requirements. The constrained TIG arc welding process exhibits significant advantages in ultra-thin metal plate welding， with the resulting weld quality and performance effectively meeting the needs of practical applications. This validates the promising application prospects of this process in ultra-thin plate welding and offers theoretical guidance for its practical implementation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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