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Multiscale Modeling of Magnetic Distribution of Ribbon Magnetic Cores
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作者 Hailin Li Zuqi Tang +1 位作者 Shuhong Wang Jianguo Zhu 《CES Transactions on Electrical Machines and Systems》 2018年第4期425-429,共5页
The multiscale finite element method(MsFEM)combined with conventional finite element method(CFEM)is proposed to solve static magnetic field in the ribbon magnetic core with non-periodical corners considered.Firstly,a ... The multiscale finite element method(MsFEM)combined with conventional finite element method(CFEM)is proposed to solve static magnetic field in the ribbon magnetic core with non-periodical corners considered.Firstly,a simple 2-dimensional electrostatic problem is used to introduce the MsFEM implementation process.The results are compared to analytical method,as well as conventional FEM.Then,an exam-ple of magneto-static problem is considered for a ribbon magnetic core built sheet by sheet as well as corners taken into considera-tion.Conventional FEM and MsFEM are used to compute the magneto-static field by adopting scalar magnetic potential.Both magnetic potential and magnetic flux density on a certain path are compared.It is shown that the results obtained by MsFEM agree well with the one from conventional FEM.Moreover,MsFEM combined with FEM is potentially a general strategy for mul-tiscale modeling of ribbon magnetic cores with complex and non-periodical structures considered,like corners and T-joints,which can effectively reduce the computational cost. 展开更多
关键词 Magneto-static multiscale finite element mul-tiscale modeling ribbon magnetic core
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Big-data analysis of phase-formation rules in high-entropy alloys
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作者 Wan-li Zhao Ding-hao Miao +1 位作者 Yong Zhang Zhan-bing He 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2017年第4期358-365,共8页
Big-data analysis of phase-formation rules of high-entropy alloys(HEAs)was conducted and a phase formation rule from a dynamic view was deduced.It was indicated in literatures that cooling rate has a strong influenc... Big-data analysis of phase-formation rules of high-entropy alloys(HEAs)was conducted and a phase formation rule from a dynamic view was deduced.It was indicated in literatures that cooling rate has a strong influence on the phase formation of HEAs.Higher cooling rate may promote the generation of amorphous phase,and accordingly suppress the formation of intermetallics.Meanwhile,it was also shown that cooling rate had little impact on the formation of solid-solution phase.To demonstrate this rule,a series of FeCoNi(AlSiB)xHEAs ribbons were fabricated by a melt-spinning technique,and the microstructure,mechanical,and magnetic properties were also investigated.The results show that all ribbons exhibit disordered solid-solution structure.The addition of boron changes the alloy from ductility to brittleness,but without evident change of magnetic properties.The alloy in the nominal composition of FeCoNi(AlSi)0.2has the best combination of mechanical and magnetic properties.A distinct feature of HEAs in magnetization was noticed and explained. 展开更多
关键词 High-entropy alloys ribbon magnetic property Melt spinning Phase formation rule
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