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7350 |
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Selective laser melted Fe-3wt.%Si soft magnet: microstructure, magnetic properties, and mechanical properties |
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Shuohong Gao* / UTBM, France Yan Xingchen / Institute of New Materials, Guangdong Academy of Sciences, China Liu Min/ Institute of New Materials, Guangdong Academy of Sciences, China Hanlin Liao/ ICB UMR 6303, CNRS, Univ. Bourgogne Franche-Comté, UTBM, France Nouredine Feninechen / ICB UMR 6303, CNRS, Univ. Bourgogne Franche-Comté, UTBM, France |
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The Fe-3wt.%Si alloy was manufactured successfully by selective laser melting (SLM) technique using gas atomized pre-alloyed powder. An investigation into the structure, magnetic properties, and mechanical properties of the SLMed Fe-3wt.%Si alloy was presented. Dense SLMed Fe-3wt.%Si magnets with a very low relative porosity below 0.5% were obtained. The microstructure of the SLMed alloy exhibited a typical columnar structure with an oriented growth of building direction (BD), it presented a <001> texture along the BD. The SLMed Only one phase related to the Bcc-Fe was found in this SLMed alloy. The Fe-3wt.%Si alloy exhibited a better comprehensive soft magnetic property after annealed treatment. The elongation at break of the specimen reached 8.8%, the ultimate tensile strength and yield strength are 562 Mpa, 445 Mpa, respectively. The average coefficient of friction and wear rate of the SLMed samples were about 0.75 and 5.3 ×10-5 mm3/(N•m), respectively. The adhesive wear and abrasive wear are the dominant wear mechanisms of this SLMed Fe-3wt.%Si alloy. |