The double-die ironing process is studied by means of UBM. The formulas of deformation load.contact stress on die surface, and tensile stress which acts on workpiece is obtained. Taking account of dirnensional accurac...The double-die ironing process is studied by means of UBM. The formulas of deformation load.contact stress on die surface, and tensile stress which acts on workpiece is obtained. Taking account of dirnensional accuracy, a new critical condition of limit reduction in cross section area is put forward for the flrst time. The test experiment indicats that results of theoretical analysis well accord with the actual conditions.[0]展开更多
YMnO3 and the Fe doped samples were prepared and the lattice constants, electrical conductivities and Seebeck coefficients were measured. The solubility limit of Fe for Mn of YMnO3 was 25 atomic %, the electrical cond...YMnO3 and the Fe doped samples were prepared and the lattice constants, electrical conductivities and Seebeck coefficients were measured. The solubility limit of Fe for Mn of YMnO3 was 25 atomic %, the electrical conductivity increased in the range of 350°C - 700°C as Fe increased up to 10%, and the doped samples showed larger Seebeck coefficient than undoped samples.展开更多
文摘The double-die ironing process is studied by means of UBM. The formulas of deformation load.contact stress on die surface, and tensile stress which acts on workpiece is obtained. Taking account of dirnensional accuracy, a new critical condition of limit reduction in cross section area is put forward for the flrst time. The test experiment indicats that results of theoretical analysis well accord with the actual conditions.[0]
文摘YMnO3 and the Fe doped samples were prepared and the lattice constants, electrical conductivities and Seebeck coefficients were measured. The solubility limit of Fe for Mn of YMnO3 was 25 atomic %, the electrical conductivity increased in the range of 350°C - 700°C as Fe increased up to 10%, and the doped samples showed larger Seebeck coefficient than undoped samples.