Effect of chromium content on mechanical properties of casting Ti-Cr alloys.
The mechanical properties of a series of binary Ti-Cr alloys were investigated. Chromium content ranged from 5 to 20 mass%. Dumbbell- and disk-shaped specimens of each alloy were obtained by casting for mechanical testing and microstructural observation. Yield strength (YS) at 0.2%, tensile strength (TS), elongation (EL) and Vickers hardness (Hv) were determined. The TS and YS of Ti-15Cr were similar to those of Ti-20Cr at approximately 880 or 900 MPa and higher than those of cp-Ti by nearly 55%. Among all Ti-Cr alloys, Ti-10Cr showed the lowest EL. At 50 µm below the surface, Hv ranged from 370 to 420. Addition of 15 or 20 mass% chromium to titanium yielded sufficient strength and relatively high elongation values. Judging from the results of the mechanical properties, the suitability of Ti-Cr alloys with 15 or 20 mass% chromium for use in dental prostheses.
Hattori
Masayuki
M
Department of Dental Materials Science, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba 261-8502, Japan. hattori@tdc.ac.jp
Takemoto
Shinji
S
Yoshinari
Masao
M
Kawada
Eiji
E
Oda
Yutaka
Y
D055598:Chemical Phenomena; D002857:Chromium / Q000032:analysis* / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry*; D003735:Dental Casting Technique / Q000295:instrumentation; D003799:Dental Stress Analysis / Q000295:instrumentation; D055119:Elastic Modulus; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D008669:Metallurgy; D008855:Microscopy, Electron, Scanning; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
D003722:Dental Alloys; D002857:Chromium; D014025:Titanium