TY - JOUR
T1 - Microstructure and mechanical properties of Pt-added and Pd-added Zr-20Nb alloys and their metal release in 1 mass% lactic acid solution
AU - Kondo, R.
AU - Suyalatu,
AU - Tsutsumi, Y.
AU - Doi, H.
AU - Nomura, N.
AU - Hanawa, T.
N1 - Funding Information:
The authors would like to thank Dr. S. Ichinose for the TEM observations. This work was partially supported by a Grant-in-Aid for Fundamental Scientific Research (Kiban B: Nos. 18300160 , 22360287 ) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan .
PY - 2011/7/20
Y1 - 2011/7/20
N2 - The effects of Pt and Pd addition to a Zr-20Nb alloy on its microstructure and mechanical property, as well as the elution of metals from the alloys in lactic acid solution, were investigated. The microstructure was characterized with an X-ray diffractometer (XRD), an optical microscope (OM), and a transmission electron microscope (TEM). The mechanical properties were evaluated by a tensile test. The β phase is dominantly observed in the Zr-20Nb as well as in the Pt-added and Pd-added Zr-20Nb alloys. Needle-like microstructures are observed in equiaxed grains in all alloys. Pd addition to the Zr-20Nb alloy suppresses ω phase formation more than Pt addition does. The 0.2% offset yield strength and the ultimate tensile strength of the Pt-added and Pd-added Zr-20Nb alloys increase with the Pt and Pd concentrations. XRD analysis revealed that the lattice parameter of β-Zr in the Pt-added and Pd-added Zr-20Nb alloys decreases with the Pt and Pd concentrations. Pt and Pd solute in β-Zr as a substitutional element and contribute to the increase in the strength by solid solution hardening. The addition of 2Pt and 2Pd to the Zr-20Nb alloy also improves metal elution from the alloys in lactic acid solution.
AB - The effects of Pt and Pd addition to a Zr-20Nb alloy on its microstructure and mechanical property, as well as the elution of metals from the alloys in lactic acid solution, were investigated. The microstructure was characterized with an X-ray diffractometer (XRD), an optical microscope (OM), and a transmission electron microscope (TEM). The mechanical properties were evaluated by a tensile test. The β phase is dominantly observed in the Zr-20Nb as well as in the Pt-added and Pd-added Zr-20Nb alloys. Needle-like microstructures are observed in equiaxed grains in all alloys. Pd addition to the Zr-20Nb alloy suppresses ω phase formation more than Pt addition does. The 0.2% offset yield strength and the ultimate tensile strength of the Pt-added and Pd-added Zr-20Nb alloys increase with the Pt and Pd concentrations. XRD analysis revealed that the lattice parameter of β-Zr in the Pt-added and Pd-added Zr-20Nb alloys decreases with the Pt and Pd concentrations. Pt and Pd solute in β-Zr as a substitutional element and contribute to the increase in the strength by solid solution hardening. The addition of 2Pt and 2Pd to the Zr-20Nb alloy also improves metal elution from the alloys in lactic acid solution.
KW - Mechanical properties
KW - Metal release
KW - Zirconium-niobium-palladium alloy microstructure
KW - Zirconium-niobium-platinum alloy
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U2 - 10.1016/j.msec.2011.02.008
DO - 10.1016/j.msec.2011.02.008
M3 - Article
AN - SCOPUS:79956092700
SN - 0928-4931
VL - 31
SP - 900
EP - 905
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
IS - 5
ER -