Ti-15%V-3%Cr-3%Sn-3%Al合金の85K付近での熱伝導度と77Kでの比抵抗 [in Japanese] Thermal conductivity at about 85K and electrical resistivity at 77 K of Ti-15 mass%V-3 mass%Cr-3 mass%Sn-3 mass%Al alloy [in Japanese]
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Thermal conductivity at about 85 K, κ, and resistivity at liquid nitrogen temperature (LN), ρ<sub>LN</sub>, of a Ti–15 mass%V–3 mass%Cr–3 mass%Sn–3 mass%Al (Ti–15–3) alloy in variously aged states were measured by steady state method and direct current 4-contacts method, respectively. Thermal conductivity at room temperature (RT) and about 85 K of the Ti–15–3 alloy specimens quenched from 1073 K was smaller than that of other titanium alloys and SUS304 stainless steel. Thermal conductivity at about 85 K was increased by accumulative isochronal aging (step heating) up to 823 K and by isothermal aging at 773 K, while resistivity at LN decreased with the aging. The increase and the decrease were ascribed to α precipitation. All values of thermal conductivity measured in the aged Ti–15–3 alloy were about a half of that of SUS304 stainless steel. Relationship between thermal conductivity at about 85 K and the average measuring temperature in steady state divided by the resistivity at LN was almost linear, and regressed equation was κ = 0.11(ρ<sub>LN</sub><sup>−1</sup><i>T</i>) −1.60, where the units are W·m<sup>−1</sup>·K<sup>−1</sup> for κ, μΩ·m for ρ<sub>LN</sub> and K for <i>T</i>.
- J. Japan Inst. Light Metals
J. Japan Inst. Light Metals 50(4), 162-165, 2000-04-30
The Japan Institute of Light Metals