In-situ synthesis of Fe-Mn-Si-Cr-Ni shape memory alloy functional coating by laser cladding

Abstract

Fe-Mn-Si-Cr-Ni composite powders are utilized to form a functional shape memory alloy cladding layer (SMACL) using a laser cladding method. The microstructure, microhardness, and phase composition of the SMACL are measured, and the extent of deformation of the laser cladding samples is determined. The SMACL is composed of planar, cellular, and dendritic crystals, equiaxed grains, and oxides with increasing distance from the substrate surface. The SMACL is further composed of ε-martensite and γ-austenite phases, while the tempered SMACL consists mainly of γ-austenite. Extensive deformation occurs in AISI 304 stainless steel laser cladding samples. By contrast, limited deformation is observed in the SMACL samples.

Microstructure and properties of Fe5Cr5SiTiCoNbMoW coating by laser cladding

“…From this equation (1), it is seen that when the coating powders were melted, reaches a maximum value. Hence, drops down to a minimum value, which means high-entropy phases are stable under high temperature, and because of the cooling rate as high as 10 6 –10 7 °C s −1 during laser cladding, the elevated temperature structure cannot be decomposed, stayed to room temperature, which is complied with sluggish diffusion effect in HEAs [24].…”

The Effects of Laser Cladding Surface Treatment on Surface Degradation Properties :a Review

“…Further. Wide distortion and residual stress arise in stainless steel (AISI 304) after laser cladding has been noticed by P. Xu, H. Ju, C. Lin, C .Zhou, and D. Pan (22) when he has performed experiments by using Fe17Mn5Si10Cr5N. S. Zhao, S. Zhou, M. Xie, X Dai, D. Chen, and L.C Zhang, L. C (23) to investigate the effect of Cu88Fe12 immiscible coating on phase separation and improved wear resistance fabricated of Cu88Fe12 immiscible coating with Fe-12%, Ni-5%, Cr-0.6%, Si-0.2% on low carbon steel and found that Fe-rich coating show higher hardness than Cu rich coating.…”

Effect of PZT doping amount on microstructure and properties of Fe-based memory alloy composite coating by laser cladding

“…Ju [17] found that the characteristic of stress self-accommodation of Fe-Mn-Si shape memory alloy can effectively reduce the residual stress generated by laser welding and has excellent mechanical properties. Xu [18] successfully prepared a Fe-Mn-Si(SMA) coating on the surface of 304 stainless steel, which has the characteristic of stress self-accommodation. The residual stress generated during the solidification process induces γ → ε martensite transformation [19,20].…”