Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys
The microstructure, phase composition, and mechanical properties of NbTiZr, TaTiZr, Re<sub>0.3</sub>NbTiZr, and Re<sub>0.3</sub>TaTiZr are reported. The alloys were produced by vacuum arc melting and hot isostatically pressed (HIP’d) at 1400 °C for 3 h under 276 MPa hydrostat...
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2021
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oai:doaj.org-article:b94a9be136eb4bf7bc1eacf724f79e452021-11-25T18:22:11ZEffect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys10.3390/met111118192075-4701https://doaj.org/article/b94a9be136eb4bf7bc1eacf724f79e452021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1819https://doaj.org/toc/2075-4701The microstructure, phase composition, and mechanical properties of NbTiZr, TaTiZr, Re<sub>0.3</sub>NbTiZr, and Re<sub>0.3</sub>TaTiZr are reported. The alloys were produced by vacuum arc melting and hot isostatically pressed (HIP’d) at 1400 °C for 3 h under 276 MPa hydrostatic pressure of high-purity argon prior to testing. NbTiZr had a single-phase BCC crystal structure, while TaTiZr had a Ti- and Zr-rich BCC matrix phase and Ta-rich nanometer-sized BCC precipitates, at volume fractions of 0.49 and 0.51, respectively. Re<sub>0.3</sub>NbTiZr consisted of a BCC matrix phase and Re-rich precipitates with a FCC crystal structure and the volume fraction of 0.14. The microstructure of Re<sub>0.3</sub>TaTiZr consisted of a Zr-rich BCC matrix phase and coarse, Re and Ta rich, BCC particles, which volume fraction was 0.47. NbTiZr and TaTiZr had a room temperature (RT) yield stress of 920 MPa and 1670 MPa, respectively. While, 10 at.% Re additions increased the RT yield stress to 1220 MPa in Re<sub>0.3</sub>NbTiZr and 1715 MPa in Re<sub>0.3</sub>TaTiZr. Re also considerably improved the RT ductility of TaTiZr, from about 2.5% to 10% of true strain. The positive strengthening effect from the Re additions was retained at high (800–1200 °C) temperatures.Oleg N. SenkovStéphane GorsseRobert WheelerEric J. PaytonDaniel B. MiracleMDPI AGarticlerefractory alloymicrostructurephase compositionCALPHADmechanical propertiesMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1819, p 1819 (2021) |
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DOAJ |
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DOAJ |
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EN |
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refractory alloy microstructure phase composition CALPHAD mechanical properties Mining engineering. Metallurgy TN1-997 |
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refractory alloy microstructure phase composition CALPHAD mechanical properties Mining engineering. Metallurgy TN1-997 Oleg N. Senkov Stéphane Gorsse Robert Wheeler Eric J. Payton Daniel B. Miracle Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| description |
The microstructure, phase composition, and mechanical properties of NbTiZr, TaTiZr, Re<sub>0.3</sub>NbTiZr, and Re<sub>0.3</sub>TaTiZr are reported. The alloys were produced by vacuum arc melting and hot isostatically pressed (HIP’d) at 1400 °C for 3 h under 276 MPa hydrostatic pressure of high-purity argon prior to testing. NbTiZr had a single-phase BCC crystal structure, while TaTiZr had a Ti- and Zr-rich BCC matrix phase and Ta-rich nanometer-sized BCC precipitates, at volume fractions of 0.49 and 0.51, respectively. Re<sub>0.3</sub>NbTiZr consisted of a BCC matrix phase and Re-rich precipitates with a FCC crystal structure and the volume fraction of 0.14. The microstructure of Re<sub>0.3</sub>TaTiZr consisted of a Zr-rich BCC matrix phase and coarse, Re and Ta rich, BCC particles, which volume fraction was 0.47. NbTiZr and TaTiZr had a room temperature (RT) yield stress of 920 MPa and 1670 MPa, respectively. While, 10 at.% Re additions increased the RT yield stress to 1220 MPa in Re<sub>0.3</sub>NbTiZr and 1715 MPa in Re<sub>0.3</sub>TaTiZr. Re also considerably improved the RT ductility of TaTiZr, from about 2.5% to 10% of true strain. The positive strengthening effect from the Re additions was retained at high (800–1200 °C) temperatures. |
| format |
article |
| author |
Oleg N. Senkov Stéphane Gorsse Robert Wheeler Eric J. Payton Daniel B. Miracle |
| author_facet |
Oleg N. Senkov Stéphane Gorsse Robert Wheeler Eric J. Payton Daniel B. Miracle |
| author_sort |
Oleg N. Senkov |
| title |
Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| title_short |
Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| title_full |
Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| title_fullStr |
Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| title_full_unstemmed |
Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys |
| title_sort |
effect of re on the microstructure and mechanical properties of nbtizr and tatizr equiatomic alloys |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/b94a9be136eb4bf7bc1eacf724f79e45 |
| work_keys_str_mv |
AT olegnsenkov effectofreonthemicrostructureandmechanicalpropertiesofnbtizrandtatizrequiatomicalloys AT stephanegorsse effectofreonthemicrostructureandmechanicalpropertiesofnbtizrandtatizrequiatomicalloys AT robertwheeler effectofreonthemicrostructureandmechanicalpropertiesofnbtizrandtatizrequiatomicalloys AT ericjpayton effectofreonthemicrostructureandmechanicalpropertiesofnbtizrandtatizrequiatomicalloys AT danielbmiracle effectofreonthemicrostructureandmechanicalpropertiesofnbtizrandtatizrequiatomicalloys |
| _version_ |
1718411281229152256 |