Microstructural evolution, interfacial phase formation, and mechanical characteristics of dissimilar CP-Ti/stainless steel friction-welded joints
Source abstract
Abstract
Dissimilar welding between commercially pure titanium (CP–Ti) and stainless steels has gained significant attention in aerospace, marine, and biomedical industries due to combined advantages of high strength, corrosion resistance, and light weight characteristics. However, the influence of various stainless steel (SS) grades on interfacial evolution and the resulting mechanical performance of dissimilar joints with CP-Ti/SS under comparable welding conditions have not been systematically reported. Hence, the present research intends to evaluate the correlation between stainless-steel alloy composition and the evolution of interfacial microstructure, elemental diffusion, hardness distribution, and mechanical performance in friction-welded CP-Ti/stainless-steel joints. Dissimilar joints of CP-Ti with SS304, SS316, and SS321 were fabricated using continuous drive rotary friction welding under optimized welding conditions. The mechanical properties and interfacial microstructure were evaluated using tensile, microhardness, optical microscopy, XRD, and SEM/EDX analysis. The experimental results were reported that the CP-Ti/SS316 exhibited the highest ultimate tensile strength of 507 MPa and the joint efficiency of CP-Ti/SS316 dissimilar joints was increased by 55% and 17.8%, when compared to SS304 and SS321, respectively. Meanwhile, the micro hardness of SS321 dissimilar joints increased by 9.1% and 10.7% at the SS interface as compared to SS304 and SS316, respectively. Microstructural examinations show that SS321's smoother transition zone, and enhanced Ti stability enhances compatibility with CP-Ti while reducing excessive brittle phase formation. Moreover, the results were demonstrated that the variations in stainless-steel alloy composition influenced elemental diffusion, interfacial microstructural evolution, hardness distribution, and consequently the mechanical performance of the friction-welded joints.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Shape Memory Alloy Transformations · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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