Mechanical and structural behavior of high-strength low-alloy steel pad welded by underwater wet welding conditions

The aim of the paper was to determine the metallurgical and mechanical behaviors of a high-strength low-alloy (HSLA) steel pad-welded specimen used in the structures of industrial and naval parts. Then to predict the metallurgical consequences (nature of the phases present) and the mechanical proper...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2023-12, Vol.129 (11-12), p.5615-5624
Main Authors: Younes, Rassim, Tomków, Jacek, Idir, Abdelhak, Boudjit, Sarra, Bradai, Mohand Amokrane
Format: Article
Language:English
Subjects:
CAE) and Design
Computer-Aided Engineering (CAD
Engineering
Ferritic stainless steels
Hardness
High strength low alloy steels
Impact strength
Impact tests
Industrial and Production Engineering
Manganese
Mechanical Engineering
Mechanical properties
Media Management
Original Article
Parameters
Solid solutions
Structural behavior
Toughness
Underwater welding
Welded joints
Welding
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Summary:The aim of the paper was to determine the metallurgical and mechanical behaviors of a high-strength low-alloy (HSLA) steel pad-welded specimen used in the structures of industrial and naval parts. Then to predict the metallurgical consequences (nature of the phases present) and the mechanical properties (hardness and impact strength) of the pad-welded steel obtained by underwater wet welding with different heat input values. The XRD patterns clearly reveal a ferritic alpha steel S460N for both parameters. The ferritic quantification is above 70 wt% for low-alloy steel. The welded specimens are characterized by the presence of different phases. In a specimen performed with higher heat input, the complex oxide Mn 2 TiO 4 was found to be around 7 wt%. Moreover, the solid solution formed with iron and manganese was observed. The hardness results obtained by indentation showed that the higher heat input resulted in higher hardness values (54 HRC) than for specimen performed with lower parameters (45 HRC). The impact test showed that the toughness of both pad-welded layers is greater than the toughness of the base material (40 kV for S2 and 34 kV for S1 about 27 kV for low-alloy steel). Moreover, it was observed that higher heat input results in increasing the impact strength of pad welds.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-023-12681-7