| Title |
Investigation of the relationship between the change in microstructure and mechanical characteristics of dissimilar welds / |
| Authors |
Ciuplys, Antanas ; Bendikiene, Regita ; Baskutis, Saulius ; Baskutienė, Jolanta |
| Full Text |
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| Is Part of |
ICM 2022: 4th international conference on materials: advanced and emerging materials, 19–21 October 2022, Barcelona, Spain: program and abstract book.. Basel : MDPI. 2022, A22, p. 92 |
| Keywords [eng] |
stainless steel ; metal inert gas welding ; dissimilar welds ; microstructure ; mechanical properties |
| Abstract [eng] |
The present study investigates the relationship between the change in microstructure and mechanical characteristics of various dissimilar welded stainless steels and a standard structural steel. It refers to a weld joining two materials from different alloy systems commonly used in heat exchangers, pressure vessels, and power plant systems. It is clear that maintaining the integrity of such welds is critical to safety issues. Therefore, detailed microscopic and experimental studies were performed to evaluate the relationship between these welds. The microscopic analysis did not reveal the presence of any weld defects such as porosity or cracks. Changes in welds were evaluated after hardness and tensile tests. The hardness profiles revealed differences between austenitic and martensitic steel welds that later showed extremely high values in the heat-affected zone, which caused fractures in this zone during a tensile test. The welds of all austenitic steel grades withstood the tensile test with fractures observed in the base metal zone. The achieved results revealed that the higher hardness of the martensitic phase is closely related to the formation of an untempered coarse martensitic structure and higher carbon content. |
| Published |
Basel : MDPI |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2022 |
