Considerations on the Selection of Materials for Prosthetic Parts Obtained by Incremental Forming

Abstract

Incremental forming is a novel but promising procedure for the flexible manufacturing of parts starting from metal sheets. It could be very useful in the medical area and especially in orthopedic prosthetics, where each part needs to be very precisely made, but at the same time has to have a unique shape. In this context, the selection of the material that could best satisfy the manufacturing and usage requirements is very important. The current paper suggests a unified parameter that could be used for assessing the suitability of a specific material for the manufacturing, by incremental forming, of prosthetic parts that would be used in human surgery

Independency of Elasticity on Residual Stress of Room Temperature Rolled Stainless Steel 304 Plates for Structure Materials

“…The stresses were either residual or cracking take place in a direction normal to the compressive stresses, often at stress level below the yield strength of the material. The crack propagation mechanisms have been theorized based on anodic dissolution at the crack tip, passivation at the point prevented by plastic deformation [7]. The principal role of plastic deformation was to accelerate the dissolution process, where hydrogen ions in the surface rapidly captured a free electron to become hydrogen atom.…”

Independency of Elasticity on Residual Stress of Room Temperature Rolled Stainless Steel 304 Plates for Structure Materials

“…The relative potency of each element is conveniently expressed in terms of either equivalence to nickel or chromium on a weight percent-age basis. The type 304 is the general purpose grade, widely used in applications requiring a good combination of corrosion resistance and formability [7]. This type yields higher strength on cold rolling.…”