[Mechanical properties of titanium casting obtained using short-time cast procedure].
The purpose of this study was to investigate the mechanical properties of titanium casting obtained using short-time cast procedure. A commercial phosphate-bonded investment for titanium casting were used. And dumbbell-shaped specimens with phi 2 mm x 14 mm parallel portion were cast according to manufacture instruction and by way of three different short-time cast procedures. Then, micro vickers hardness test and tensile test were performed with these specimens. In the hardness test, the micro vickers hardness of 50 approximately 250 microns deep location from specimen surface was ranged from 192.8 to 259.0 Hv; there were significant difference among both the location factor and the casting procedure factor by the two-way ANOVA (p < 0.05). In the tensile test, tensile strength, yield strength, elastic modulus and elongation were obtained: these tensile properties of short-time cast procedures were not significantly different from those of manufacture instruction. These results indicated that the short-time cast procedure for titanium casting was available in the point of mechanical properties. It was, however, not obvious that how the short-time cast procedures effected the dimensional accuracy of titanium casting. Therefore, further investigation was needed for the practical usage of this method.
Tonami
K
K
Clinic of Initial Diagnosis/Emergency, Hospital Attached to Faculty of Dentistry, Tokyo Medical and Dental University.
Ohtani
T
T
Iwasaki
N
N
Motomura
K
K
Nakamura
H
H
Takahashi
H
H
Nishimura
F
F
D003735:Dental Casting Technique; D006244:Hardness; D013718:Tensile Strength; D014025:Titanium
D014025:Titanium