On the Elastic Anisotropies and its Temperature Change of Single Crystals of High Elasticity Alloy “Dia-flex” in the Co-Fe-Ni-Cr-W-Mo System
1967 Volume 31 Issue 3 Pages 263-268
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1967 Volume 31 Issue 3 Pages 263-268
The thermal expansion in the temperature range of 0° to 800°C, Young’s modulus in the temperature range of −50° to 300°C, rigidity modulus in the temperature range of 10° to 50°C and the mechanical strength at room temperature in a high elasticity alloy of F.C.C. type “Dia-flex” consisting of 38.0%Co, 22.4%Fe, 16.5%Ni, 12.0%Cr, 4.0%W, 4.0%Mo and small amounts of other elements were measured with the single crystals and annealed poly-crystals (in the predominant direction ⟨112⟩(1\bar10): Young’s modulus 23.00×105 kg/cm2, elastic limit 120 kg/mm2 and tensile strength 250 kg/mm2). Then, from the data obtained, the volume compressibility, the principal elastic parameters Sij, the principal elastic constants Cij, and Young’s modulus and the rigidity modulus in three principal orientations of the single crystals were calculated. From the result it has been known that Young’s moduli at 20°C are 11.68×105 kg/cm2, 22.49×105 kg/cm2 and 33.78×105 kg/cm2, and the rigidity moduli at 20°C, 12.01×105 kg/cm2, 5.93×105 kg/cm2 and 5.33×105 kg/cm2 respectively in the orientations of ⟨100⟩, ⟨110⟩ and ⟨111⟩ of the single crystals, showing high anisotropies of elastic moduli. The anisotropy of the temperature coefficients of elastic moduli is also very high.
