Nb reinforced Fe-Mn-Si shape memory alloy composite coating fabricated by laser cladding on 304 stainless steel surface

다국어 초록 (Multilingual Abstract)

Laser cladding technology was adapted to fabricate Fe-based shape memory alloy/Nb composite coatings with 5 wt. % Nb doping amounts on 304 stainless steel to promote the microhardness and wear resistance. The SEM, XRD, optical profilometer and electrochemical workstation were used to characterize micromorphology, phase and microstructure.
Meanwhile, wear and anti-resistance ability were detected. The results showed that Nb, NbC, ε-martensite, α’-martensite and γ-austenite were found in SMA/Nb coating. The microhardness was enhanced because of the solid solution strengthening and second phase strengthening.
Also, the shape recovery rate and anti-corrosion property of the SMA/Nb coating are improved as well.

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