4 Cobalt Based Alloys

This set of flashcards covers key vocabulary and concepts related to Co-based alloys, their applications, properties, and manufacturing processes.

Co-based alloys

Materials known for excellent mechanical properties like strength, toughness, castability, corrosion resistance, and wear resistance.

Vitallium

A cast Co–Cr–Mo alloy known for its excellent pitting corrosion and wear resistance.

MP-35N

A Co–Ni–Cr–Mo alloy renowned for high mechanical resistance and low wear debris production.

ASTM specification

Standard specifications that define the composition and mechanical properties of materials, such as Co-Cr-Mo alloys.

Martensitic transformation

The process where cobalt allotropically transforms from the stable gamma phase (fcc) to the epsilon phase (hcp) and vice versa.

Stacking Fault Energy (SFE)

A measure that greatly affects the plastic workability of Co-based alloys.

Grain refinement

A process to strengthen metallic materials while maintaining ductility by reducing grain size.

Corrosion resistance

The ability of a material to withstand damage caused by corrosion, enhanced in Co–Cr–Mo alloys by a dense passive oxide film.

Metallosis

A condition caused by the release of metal ions from prosthetic devices, especially associated with Co–Cr–Mo alloys.

Thermomechanical processes

Processes involving the combination of thermal and mechanical treatments to enhance material properties during manufacturing.