Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy
Achieving a good match between strength and conductivity is a challenge of the development of the high-performance Cu-Cr-Nb alloy for aerospace and fusion energy. The effect of heat treatment on Cr<sub>2</sub>Nb phase, strength and conductivity of spark plasma sintered (SPSed) Cu-2Cr-1Nb...
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2020-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/12/2860 |
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| author | Xueqian Lv Zuming Liu Ting Lei Quan Li Yake Ren Xu Zhou Zejie Zhang |
| author_facet | Xueqian Lv Zuming Liu Ting Lei Quan Li Yake Ren Xu Zhou Zejie Zhang |
| author_sort | Xueqian Lv |
| collection | DOAJ |
| description | Achieving a good match between strength and conductivity is a challenge of the development of the high-performance Cu-Cr-Nb alloy for aerospace and fusion energy. The effect of heat treatment on Cr<sub>2</sub>Nb phase, strength and conductivity of spark plasma sintered (SPSed) Cu-2Cr-1Nb (at%) alloy was investigated. The results illustrated that Cr<sub>2</sub>Nb phase of Cu-2Cr-1Nb alloy can be regulated by heat treatment, multi-scale Cr<sub>2</sub>Nb phase with sizes of 0.10–0.50 μm, 30–100 nm and less than 30 nm was obtained, and the strength and conductivity were significantly increased after heat treatment at 500 °C for 2 h, the room temperature tensile strength and conductivity were 332 MPa and 86.7% IACS, 2.5% and 34.8% higher than those of as-SPSed alloy; the tensile strength at 700 °C was 76 MPa. Increasing heat treatment temperature and time, the tensile strength of the alloy was reduced by 1.5%, 4.3% and 12.3% after heat treatment at 500 °C, 700 °C and 950 °C for 72 h. The good match between strength and conductivity of Cu-Cr-Nb alloy was obtained by reducing the content of alloying elements (Cr and Nb) and microstructure regulation. This approach can be used to prepare structural/functional materials with excellent strength and conductivity. |
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| format | Article |
| id | doaj.art-56b7081c66084e39ab6fa7f56bed09f2 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T18:53:13Z |
| publishDate | 2020-06-01 |
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| series | Materials |
| spelling | doaj.art-56b7081c66084e39ab6fa7f56bed09f22023-11-20T04:59:45ZengMDPI AGMaterials1996-19442020-06-011312286010.3390/ma13122860Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb AlloyXueqian Lv0Zuming Liu1Ting Lei2Quan Li3Yake Ren4Xu Zhou5Zejie Zhang6State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaAchieving a good match between strength and conductivity is a challenge of the development of the high-performance Cu-Cr-Nb alloy for aerospace and fusion energy. The effect of heat treatment on Cr<sub>2</sub>Nb phase, strength and conductivity of spark plasma sintered (SPSed) Cu-2Cr-1Nb (at%) alloy was investigated. The results illustrated that Cr<sub>2</sub>Nb phase of Cu-2Cr-1Nb alloy can be regulated by heat treatment, multi-scale Cr<sub>2</sub>Nb phase with sizes of 0.10–0.50 μm, 30–100 nm and less than 30 nm was obtained, and the strength and conductivity were significantly increased after heat treatment at 500 °C for 2 h, the room temperature tensile strength and conductivity were 332 MPa and 86.7% IACS, 2.5% and 34.8% higher than those of as-SPSed alloy; the tensile strength at 700 °C was 76 MPa. Increasing heat treatment temperature and time, the tensile strength of the alloy was reduced by 1.5%, 4.3% and 12.3% after heat treatment at 500 °C, 700 °C and 950 °C for 72 h. The good match between strength and conductivity of Cu-Cr-Nb alloy was obtained by reducing the content of alloying elements (Cr and Nb) and microstructure regulation. This approach can be used to prepare structural/functional materials with excellent strength and conductivity.https://www.mdpi.com/1996-1944/13/12/2860Cu-2Cr-1Nb alloyheat treatmentmulti-scale Cr<sub>2</sub>Nb phaseheat treatment hardeningtensile strengthconductivity |
| spellingShingle | Xueqian Lv Zuming Liu Ting Lei Quan Li Yake Ren Xu Zhou Zejie Zhang Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy Materials Cu-2Cr-1Nb alloy heat treatment multi-scale Cr<sub>2</sub>Nb phase heat treatment hardening tensile strength conductivity |
| title | Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy |
| title_full | Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy |
| title_fullStr | Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy |
| title_full_unstemmed | Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy |
| title_short | Effect of Heat Treatment on Cr<sub>2</sub>Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy |
| title_sort | effect of heat treatment on cr sub 2 sub nb phase and properties of spark plasma sintered cu 2cr 1nb alloy |
| topic | Cu-2Cr-1Nb alloy heat treatment multi-scale Cr<sub>2</sub>Nb phase heat treatment hardening tensile strength conductivity |
| url | https://www.mdpi.com/1996-1944/13/12/2860 |
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