Patent ID: 7357731

Claim:
A golf club, comprising: a club shaft; and a club head, wherein at least one of the club shaft and the club head being made at least in part of a composite material comprising an amorphous metal alloy forming a substantially continuous matrix; and a second ductile metal phase embedded in the matrix and formed in situ in the matrix by crystallization from a molten alloy, and wherein the second phase is sufficiently spaced apart for inducing a uniform distribution of shear bands throughout a deformed volume of the composite, the shear bands involving at least four volume percent of the composite before failure in strain and traversing both the amorphous metal phase and the second phase, and wherein the composite material has the following specific properties: an elastic strain limit of around 2.0%, a yield strength of around 1.6 GPa, and a tensile ductility of from 5 to 10%.