Electron backscatter diffraction study on bonding and crack formation mechanism of laser cladding NiTi alloy on 316 substrate

Summary: TC4/NiTi multi-materials structure components were successfully fabricated via multi-wire arc additive manufacturing (MWAAM). The interface characteristics and mechanical properties of TC4/NiTi multi-materials structure component under bionic gradient interlayer build strategy were investigated. The results showed that MWAAM TC4/NiTi gradient heterogeneous alloy exhibited excellent compression behavior, with an ultimate compression strength of 1533.33 +/- 26 MPa.

Summary: The addition of a Ni interlayer is effective in preventing the formation of brittle intermetallic compounds and improving the metallurgical bonds in the 316L/Ti6Al4V bimetallic structure.

Summary: The advancement of laser-metal additive manufacturing has enabled the printing of multimaterial/multifunctional designs to meet the increasing demand from industries such as aviation, aerospace, automobile manufacturing, and energy production. By integrating material-structure-performance, major improvements in performance and function can be achieved through the right materials printed in the right positions and unique structures printed for unique functions. This approach exemplifies the revolution of design and manufacturing strategies in additive manufacturing.