研究目的
Investigating the weldability of an innovative 18% Mn austenitic TWIP steel joined to a conventional DP steel by laser arc hybrid welding with an austenitic filler wire to improve weld strength and avoid Mn segregations and improper microstructures.
研究成果
Hybrid welding and the use of an austenitic filler can positively affect the weldability of DP-TWIP dissimilar joints, as demonstrated by defect-free welds, microstructure characterization, microhardness profiles, and tensile tests.
研究不足
The study did not investigate the statistical significance of the findings using a plan of experiment approach, which could provide more robust conclusions.
1：Experimental Design and Method Selection:
The study used laser arc hybrid welding with an austenitic filler wire to join TWIP and DP steels.
2：Sample Selection and Data Sources:
DP and TWIP steel plates with specified chemical compositions were used.
3：List of Experimental Equipment and Materials:
An Ytterbium Laser System (IPG YLS-4000), MAG torch, and 316L-Si/SKR-Si austenitic filler wire were used.
4：Experimental Procedures and Operational Workflow:
The welding process involved different laser powers and a fixed welding speed, with metallographic examinations, microhardness, and tensile tests conducted post-welding.
5：Data Analysis Methods:
Optical microscopy for microstructure analysis, Vickers microhardness tests, and tensile tests to assess mechanical properties.
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