Structural Analysis of CoCrMoSi6 Alloy Used in Medical Applications

Abstract

Increase the life exploitation of implants has been the motor factor in the elaboration of the new biocompatible alloys based on cobalt. The paper aims the complete structural characterizations for CoCrMoSi6 alloy, based on modern investigation methods, like compositional analysis by EDX method, optical and electronic microscopy analysis, X-ray diffractrometric analysis, fracture analysis. The experiments aimed to establish all the structural aspects for CoCrMoSi6 alloy and his recommendation for using to manufacture the components for medical applications. The results obtained from the SEM microstructural analysis, for the original version allied with silicon in percentage of 6%, certify a dendritic structure specific to the cobalt base alloys. This paper established the structural aspects for a new variant of CoCrMoSi6 alloy and recommends their use successfully in the production of components for medical applications.

Diffractografic Analysis of AISI 420 Steel

“…The principal characteristic of stainless steel is a good resistance at corrosion, conferred by the alloying elements like chrome and chrome and nickel combination. By addition of other elements, can be improved the corrosion resistance in wet (Mo, Cu), the oxidation resistance at high temperatures (Si, Al, W, Mo), but also the mechanical characteristics at high and low temperatures (W, Mo, Nb, Co) [2][3][4][5]. The stainless steels, usually, are used at temperatures up to 800 °C.…”

The Analysis of Physical-Structural Properties for AISI 321 Steel

“…The Cr 23 C 6 carbide can dissolve the chemical elements like molybdenum, tungsten, vanadium and nickel. May be formed and other chrome carbides Cr 7 C 3, Cr 6 C, as well as nitrides like CrN and Cr 2 N. The presence in composition of the chemical elements like titanium, niobium or zirconium lead to formation of carbides, nitrides or combinations, which present a cubic structure with central faces [5,7,8]. The inter-metallic phases (figure 1) are the following: 1.…”