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

• 作 者: 徐鹏 鞠恒 林成新 周超玉 潘德位
• 机 构: Transportation Equipment and Ocean Engineering College, Dalian Maritime University,
• 出 处: Chinese Optics Letters
• 发表日期: 2014年04期
• 关键词: cladding microhardness stainless martensite austenite tempered AISI equiaxed uti

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 ofε-martensite andγ-austenite phases,while the tempered SMACL consists mainly ofγ-austenite.Extensive deformation occurs in AISI304 stainless steel laser cladding samples.By contrast,limited deformation is observed in the SMACL samples.

Fe-Mn-Si-Cr-Ni composite powders are utilized to form a functional shape memory alloy cladding layer (SMACL) using a laser cladding method. Microstructure, microhardness, and phase composition of the SMACL are measured, and 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.