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 \varepsilon -martensite and \gamma -austenite
phases, while the tempered SMACL consists mainly of \gamma -austenite. Extensive deformation occurs in AISI
304 stainless steel laser cladding samples. By contrast, limited deformation is observed in the SMACL samples.
© 2014 Chinese Optics Letters
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