Abstract
The mechanical properties of titanium castings have been examined by using a tensile test. However previous studies have not evaluated the elasticity (apparent elastic modulus and proof stress) of titanium castings.
The objective of this study was to examine elasticity of titanium castings. The apparent elastic modulus and proof stresses were calculated from the results of a three-point bending test, their usefulness was assessed by a hardness test and observation of the microstructure.
The elastic modulus of titanium castings was similar to that of As cast and aging of ADA type IV gold alloy. The proportional limit, 0.03% proof stress and 0.2% proof stress of titanium castings were similar to those of a solid-solution-treated ADA type IV gold alloy. The superficial hardness of titanium castings varied with the casting condition. This variation in the hardness correlated with the elastic modulus. Thus, the elastic modulus of titanium castings was found to be markedly affected by the superficial hard layers of titanium castings. These findings suggest that the three-point bending test is useful in assessing the apparent elastic modulus of titanium castings.
