| abstract |
The invention comprises an implant (10) comprising a cobalt alloy, the cobalt alloy having a percent elongation of at least 10 percent, the implant (10) further comprising a wear surface (12) including at least a first portion (14) having a Knoop Hardness Number of at least 560, and a subsurface region (16) including at least a second portion (18) adjacent the first portion (14) and having a Knoop Hardness Number that is less than the Knoop Hardness Number of the first portion. |