What question did this study set out to answer?

This research aims to improve mechanical properties and reduce defects in Ti/steel dissimilar metal joints.

May 30, 2026Journal of Manufacturing Processes0 citationsOpen Access

A novel hybrid joining strategy for Ti/steel dissimilar metals: Laser pre-melting interlayer modification assisted CMT welding

XZXiaobin ZhangNortheast Electric Power University YXYingyu XiaoElectric Power University WXWeifeng XieNortheast Electric Power University

Key Points

This research aims to improve mechanical properties and reduce defects in Ti/steel dissimilar metal joints.
Laser pre-melting of V/CNTs interlayer in combination with CMT welding process.
Evaluation of joint tensile strength, hardness, and microstructural properties post-welding.
Tensile strength increased by 37.1%, with average hardness improved by 9.71%.
Achieved a grain refinement rate of 35.7% in the weld seam.
Elimination of interfacial cracks and porosity defects was observed.

Abstract

• Laser pre-melting V/CNTs interlayer/CMT composite process significantly eliminates interfacial cracks and porosity defects. • This innovative process achieves a grain refinement rate of 35.7% in the weld seam. • The joint tensile strength increases by 37.1% and average hardness improves by 9.71%, attributed to fine-grain strengthening and second-phase strengthening mechanisms. • This process regulates the in-situ generated nanoscale TiC, VC, and CuTi₂ strengthening phases, promoting equiaxed grain formation and driving the Orowan strengthening effect.

问 AI

Bookmark

View Full Paper

Cite This Study

Zhang et al. (Wed,) studied this question.

synapsesocial.com/papers/6a1a7e9c0307b78509431322 https://doi.org/https://doi.org/10.1016/j.jmapro.2026.05.045

问 AI

Bookmark

View Full Paper