Functionally graded material designs for application of fusion of cell nuclei

(1) 50% 316-50% W的材料在等离子喷涂后的延展性很低，而316型不锈钢的母材则表现出较大的延展性。(2)拉伸试验用板材试样（厚度1.5mm）在放电加工过程中，热压材料梯度区中心富W区出现断裂，而大块材（厚度约10mm）在放电加工过程中未出现断裂。这被认为是由于加工过程中残余应力的释放。在梯度区外的富W区还观察到较大的裂缝。

(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.