Functionally graded material designs for application of fusion of cell nuclei

(1)50%316 - 50%W的材料即使在使用等离子喷涂方法制造之后也显示出非常低的延展性，而316型不锈钢的基底金属显示出大的延展性。(2)在放电加工1.5mm厚的拉伸试样过程中，热压材料梯度区中心富W区发生断裂，而在放电加工10 mm厚的大块试样过程中没有发生断裂。这被认为是由于在加工过程中残留应力的释放。另一个大的裂纹在富W区观察到的梯度区域的区域外。

(1) The material of the 50% 316-50% W showed very low ductility even just after the fabrication using the plasma spraying method, while the base metal of type 316 stainless steel showed the large ductility.(2) During the discharge machining of plate specimens (thickness : 1.5mm) for tensile test, fracture of W rich zone in the center of graded region of the hot pressed materials occurred, although fracture did not occur during the discharge machining of large block (thickness : about 10mm). This is considered to be due to the release of retained stress during the machining. Another large crack in the W rich zone was observed outside area of the graded region.