
386 Materials and Process Selection for Engineering Design
costs of processing and nishing are expected to represent a large proportion of
the total cost.
Based on the preceding discussion, the material requirements for the pin of the
hip joint prosthesis can be summarized as shown in Table 11.4. Higher values of
the rst six properties are more desirable and should comply with the lower limits
outlined in the discussion. According to the limits on properties method, which is
discussed in Section 9.5, these properties are lower-limit properties. Elastic modulus
and specic gravity are target-value properties, as materials should match the bone ...