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<p>Among all other alloys, titanium alloys have demanding applications in aerospace, automobiles, and defense due to their superior properties to monolithic ones. The similar and dissimilar Ti-6Al-3Nb-2Zr-1Mo (Ti6321) and stainless steel (SS 310) joints are performed through friction stir welding. This work investigates the mechanical and corrosion behavior of FSW joints. Significant efforts have been made in research and development to create titanium alloys that possess both high strength and low weight in response to their increasing demand in industrial and orthopedic applications where durability and efficiency are crucial. The three microscopically distinct regions of the weld nugget and heat-affected zone on the advancing and retreating sides for welds made with different tool pin profiles are carried out. Tensile, microhardness, and compression tests are conducted on all five plates. The macrostructure, including an analysis of the corrosion test, is performed. It is observed that the similar Ti6321 joint with a 6&#xa0;mm pin diameter, 60&#xa0;mm transverse speed, 900&#xa0;mm rotational speed, and a constant axial force of 1&#xa0;KN exhibits a maximum compression strength of 1037&#xa0;MPa and microhardness of 362&#xa0;HV when compared to other joints. The results identified that similar joints significantly affect the microstructure, mechanical properties, and corrosion resistance.</p>

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Assessment of Corrosion and Macrostructural Behavior of Ti6321/SS 310 Butt Joints: In Situ Study of Similar and Dissimilar Joints via Friction Stir Welding Technique

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • K. Sai Sujith,
  • S. Ravi

摘要

Among all other alloys, titanium alloys have demanding applications in aerospace, automobiles, and defense due to their superior properties to monolithic ones. The similar and dissimilar Ti-6Al-3Nb-2Zr-1Mo (Ti6321) and stainless steel (SS 310) joints are performed through friction stir welding. This work investigates the mechanical and corrosion behavior of FSW joints. Significant efforts have been made in research and development to create titanium alloys that possess both high strength and low weight in response to their increasing demand in industrial and orthopedic applications where durability and efficiency are crucial. The three microscopically distinct regions of the weld nugget and heat-affected zone on the advancing and retreating sides for welds made with different tool pin profiles are carried out. Tensile, microhardness, and compression tests are conducted on all five plates. The macrostructure, including an analysis of the corrosion test, is performed. It is observed that the similar Ti6321 joint with a 6 mm pin diameter, 60 mm transverse speed, 900 mm rotational speed, and a constant axial force of 1 KN exhibits a maximum compression strength of 1037 MPa and microhardness of 362 HV when compared to other joints. The results identified that similar joints significantly affect the microstructure, mechanical properties, and corrosion resistance.