Effect of annealing on the microstructure and magnetic properties of soft magnetic Fe-Si produced via laser additive manufacturing. (1st January 2018)

• Record Type: Journal Article
• Authors: Garibaldi, M.; Ashcroft, I.; Lemke, J.N.; Simonelli, M.; Hague, R.
• Is Part Of: Scripta materialia. Number 142(2018)
• Page Start: 121
• Page End: 125
• Publication Date: 2018-01-01
• Subjects: Additive manufacturing -- Annealing -- Powder processing -- Soft magnetic materials -- Magnetic properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.08.042
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We investigate the effect of annealing on the properties of Fe-6.9wt% Si produced by Selective Laser Melting (SLM), a powder-bed additive manufacturing technology. Results show that annealing at 1150 °C for 1 h produces a recrystallized microstructure characterised by predominantly equi-axed grains with sizes of up to 300 μm. Importantly, annealing retains the SLM-induced crystallographic 〈001〉 texture along the build direction of the sample. The quasi-static magnetic properties achieved upon annealing, with maximum relative permeability of 24, 000 and coercivity of 16 A/m, compare favourably with those reported for commercial high-Si steel laminations. Graphical abstract: