Modern designing of mechanical components and tools should take under consideration their intrinsic stresses and surface condition. The ability of the manufacturing technologies as well as the heat-treating processes to affect such properties must be assessed early in the design process if improving performance and durability of the component are needed.[1-3]
Mechanical surface technologies such as rolling and shot peening play important roles in inducing the surface compressive stress needed for increasing bending fatigue of components such as powdered-metal gears. However, those processes are not always sufficient or well-suited for increasing surface properties to the required level.