| Nd_(16)Fe_(77.5)B_(5)Cu_(1.5) alloys were prepared by the hot-pressing method. The stress distribution during compression was calculated with a finite element method program(SPID). The calculated stresses were effective stress(σ_(eff), compressive direction stress(σz), and shear stress(τ_(rz). The computer simulation showed that σ_z was very high at the center-part of the specimen, and decreased toward the peripery-part of a specimen. It was expected from the computer simulation results that the magnetic properties would be better at the center-part of a specimen than any other parts, However, it turned out that the mid-part in between the center-and peripery-part showed the best magnetic properties. Casting before hot press was thought to be responsible for this discrepancy. |
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