Additive manufacturing (AM) is an attractive processing route to make efficient use of rare-earth elements (REE) in systems containing complex-shaped (RE) based magnets. Powder bed fusion using laser beam (PBF-LB) one the most promising technologies obtain fully dense AM parts and has seen significant recent research efforts. However, works commercial Nd-Fe-B powders with a composition more suited for binder methods, which reduces parameter window does not allow property enhancement by...

We study the use of topology optimization in design low-loss ferromagnetic core structures for additively manufactured electrical machines. The test case was a simple toroid with primary and secondary winding. A 2D axisymmetric finite element method model implemented toroid, optimized minimum losses maximum flux linkage. then modified additive manufacturing, samples were built via laser powder bed fusion. B-H characteristics measured several operation points. compared against an solid core,...

Additive manufacturing (AM) is an attractive processing route to make efficient use of rare-earths in systems containing complex-shaped rare-earth based magnets. Powder bed fusion using laser beam (PBF-LB) one the most promising technologies obtain fully dense printed parts and has seen significant recent research. However, works commercial NdFeB-type powders with a composition more suited for binder AM methods, which reduces printing parameter window does not allow property enhancement by...

In earlier research it was observed that small differences in the alloying and processing conditions can greatly influence microstructure hence magnetic performance of laser powder bed fusion (PBF-LB) processed soft Fe-Co-V material. However, a systematic study on effect alloy composition heat treatments properties PBF-LB manufactured alloys is pending underlying mechanisms remain to be better understood. The two different (with without Nb addition) by with sample types (small large...

Nitrogen alloyed austenitic nickel-free stainless steel (ANFSS) is one of the most promising group materials for consumer and healthcare products. They can be used to substitute not only conventional AISI 316L, but also more expensive titanium Co-Cr alloys. Previously utilization nitrogen has been limited due poor machinability resulting from high strength ductility, difficulties in manufacturing raw materials. Recent developments powder metallurgy, example, additive (AM), offer feasible net...

Abstract Nearly all commercially available alloys have been developed for manufacturing processes other than additive manufacturing. Most of those are not suitable laser powder bed fusion (L-PBF) processing due to the non-weldable nature casting, forging, and machining. Even some weldable can be difficult produce with L-PBF because characteristics L-PBF, such as highly concentrated heat input extremely high cooling rate, lead very residual stresses cracking. In order speed up development...

All Finnish males must attend compulsory military service that lasts from 6 months to 1 year. About 25 000 (approximately 80% of each age cohort) and 400 volunteer females complete the annually. The aim study was investigate types dental trauma occurring among conscripts during their service. article also focused on how is treated in Defence Forces.All records Forces' patient register concerning years 2011 2012 were analysed by tooth number, treatment procedures number visits.According...

Laser powder bed fusion is an additive manufacturing method that based on melting and solidification of material. Due to the local heating above point, thermal stresses are usually formed in final part. Mitigation residual assessed by laser scan strategies not alloy tailoring. In this paper a segregation-based stress formation mechanism proposed computationally. Additionally, experimental setup for rapid screening various alloys proposed. The results should ease material development metal...

Nitrogen alloyed austenitic nickel-free stainless steel (ANFSS) is one of the most promising group materials for consumer and health care products. They can be used to substitute not only conventional AISI 316L, but also titanium Co-Cr alloys. Previously utilization nitrogen has been limited due high work hardening rate. Recent developments in powder metallurgy, e.g., additive manufacturing (AM), are offering economically feasible net shape routes go around machining related problems. In...

Additive Manufacturing (AM) is considered as one of the most suitable methods for building parts with complex designs. AM described an efficient and sustainable manufacturing method, when compared to traditional methods. To understand credibility a process, study life cycle assessment (LCA) was conducted PBF-LB, BJT-M CNC machining impeller. The LCA calculations were made different scenarios respect feedstock. It observed that had largest CO2 footprint followed by machining. concluded BJT...

Nitrogen-alloyed austenitic nickel-free stainless steels (ANFSS) are known for their good corrosion resistance and mechanical properties, stable non-magnetic nature. As long as the nitrogen content remains within certain limits, increasing generally improves all said properties. However, if is increased up to a too high level, ductile-to-brittle transition may take place. The optimal level determined by other alloying elements that can have role in stabilizing austenite solubility melt...

Clean and smart electrification is at the core of European Green Deal since it definitively a key option for society’s decarbonization tackling climate change. The transformation processes mobility creating an unparalleled demand components like electric machines. This, concurrently, causing huge push towards higher efficiencies power densities, lighter weights, customized solutions machines, meaning that innovation in field required to fulfil future demands. Additive Manufacturing (AM) seen...

Green electrification is vital for the society’s decarbonization. This sets a strong pressure on manufacturers of electric machines to produce items higher efficiency and, simultaneously, prepare oneself forecasted supply risks raw materials. Additive Manufacturing (AM) seen as enabler components novel machine architectures with designs and performance unattainable conventional manufacturing. In this study, permanent magnet (PM) assisted synchronous reluctance motor based laser powder bed...

Tool steels are martensitic alloyed with carbide forming elements, thus having high strength, hardness and wear resistance. These characteristics, however, make them costly materials to shape into complex geometries. Laser powder bed fusion (PBF-LB) enables the consolidation of near-net-shape shapes from powders, which is a highly resource efficient way producing tools. However, processing tool PBF-LB problematic due hardening segregation generated during process leading stresses eventually...

NdFeB permanent magnets are key components for the energy transition and electrification of transportation, which causes their demand to grow at high pace. Yet, supply risk rare earth metals motivates industry look an efficient use magnets. Designing systems with complex-shaped can help reducing magnet if accompanied by development net-shape processes. Powder Bed Fusion using Laser Beam has been studied since 2016 as a way produce dense parts without any binder; most works based on...

Microstructure is the origin of properties and performance for additively manufactured metals. Rapid solidification enable formation various grain|phase structures as well solute segregation initial dislocation that all contribute to alloy. We present following methods in this work. An effective way approach process-structure-properties linkage rapid utilize a phase field model coupled with thermomechanical crystal plasticity. This allows us assess both intra-grain|polycrystal level...

Electrification of the world has significantly increased demand for novel high performance electromechanical components. Powder Metallurgy and especially Additive Manufacturing are seen as enablers to produce components based on soft magnetic materials with designs unattainable conventional manufacturing. Fe-Si-X were studied by focusing tailor material Laser Bed Fusion (L-PBF) processing. Effect different alloying elements magnetic, electrical mechanical properties simulations experiments....