Achieving Synchronous Improvement in Mechanical Properties and Softening Resistance of Cu-Cr Alloys by Introducing Ta

被引:0
作者
Li, Ningyu [1 ]
Yu, Shizhi [1 ]
Li, Mingyang [2 ]
Yu, Wenhao [1 ]
Jian, Renyi [1 ]
Yu, Yachao [1 ]
Wang, Xinyu [3 ]
Chang, Yongqin [1 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Xian Rare Met Mat Inst Co Ltd, Xian 710016, Peoples R China
[3] Third Construct Engn Co Ltd, China Construct Engn Bur 2, Beijing 100070, Peoples R China
基金
中国国家自然科学基金;
关键词
Cu-Cr alloys; mechanical testing; microstructures; powder metallurgy; softening resistance; Ta addition; NANOCRYSTALLINE COPPER; THERMAL-STABILITY; MICROSTRUCTURE; STABILIZATION; STRENGTH; BEHAVIOR; SYSTEM;
D O I
10.1007/s11665-024-10575-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cu-0.6 at.%Cr (Cu-Cr) and Cu-0.6 at.%Cr-0.6 at.%Ta (Cu-Cr-Ta) alloys were prepared by mechanical alloying combined with spark plasm sintering. The effective refinement of the microstructure along with the significantly increased dislocation density in Cu-Cr alloy is achieved through the introduction of Ta. Most precipitates transform from Cr precipitates into Cr2Ta Laves phases with semi-coherent interfacial structure, which provides the effective inhibition effect to dislocation movement and grain coarsening, along with significantly enhanced mechanical properties. Compared with Cu-Cr alloy, 25% and 24% enhancement for the yield strength (413 MPa) and ultimate tensile strength (497 MPa) is realized by Cu-Cr-Ta alloy along with the acceptable elongation of 13.1%. It is worth noting that the significant improvement for high-temperature mechanical properties is also realized through the introduction of Ta, showing the 130% and 124% enhancement of yield strength and ultimate tensile strength at 450 degrees C, respectively. The softening temperature of Cu-Cr-Ta alloy reaches 1015 degrees C, which is 16% higher than that of Cu-Cr alloy (876 degrees C). This study provides an effective approach to improve the mechanical properties and softening resistance of the traditional Cu-Cr alloys under the elevated temperature environment, which has a great potential application in the field of future fusion reactor.
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页数:10
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共 33 条
[1]   New insights on the formation of supersaturated solid solutions in the Cu-Cr system deformed by high-pressure torsion [J].
Bachmaier, A. ;
Rathmayr, G. B. ;
Bartosik, M. ;
Apel, D. ;
Zhang, Z. ;
Pippan, R. .
ACTA MATERIALIA, 2014, 69 :301-313
[2]   Materials for the plasma-facing components of fusion reactors [J].
Bolt, H ;
Barabash, V ;
Krauss, W ;
Linke, J ;
Neu, R ;
Suzuki, S ;
Yoshida, N .
JOURNAL OF NUCLEAR MATERIALS, 2004, 329 :66-73
[3]   Thermal stability and high-temperature mechanical performance of nanostructured W-Cu-Cr-ZrC composite [J].
Cao, Lijun ;
Hou, Chao ;
Tang, Fawei ;
Liang, Shuhua ;
Luan, Junhua ;
Jiao, Zengbao ;
Liu, Chao ;
Song, Xiaoyan ;
Nie, Zuoren .
COMPOSITES PART B-ENGINEERING, 2021, 208
[4]   Superior combination of strength and ductility in Fe-10Mn-0.6C steel trigged by austenite reversion transformation [J].
Chen, T. J. ;
Cui, E. X. ;
Shen, Y. F. ;
Jia, N. ;
Wang, Z. D. ;
Fan, Z. J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2024, 901
[5]   DEFORMATION TWINNING [J].
CHRISTIAN, JW ;
MAHAJAN, S .
PROGRESS IN MATERIALS SCIENCE, 1995, 39 (1-2) :1-157
[6]   Microstructure and mechanical properties of bulk nanostructured Cu-Ta alloys consolidated by equal channel angular extrusion [J].
Darling, K. A. ;
Tschopp, M. A. ;
Guduru, R. K. ;
Yin, W. H. ;
Wei, Q. ;
Kecskes, L. J. .
ACTA MATERIALIA, 2014, 76 :168-185
[7]   Grain size stabilization of nanocrystalline copper at high temperatures by alloying with tantalum [J].
Darling, K. A. ;
Roberts, A. J. ;
Mishin, Y. ;
Mathaudhu, S. N. ;
Kecskes, L. J. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 573 :142-150
[8]   Simultaneous enhancement of strength and ductility in a medium carbon low-alloy steel induced by secondary martensite and Cu-rich particles [J].
Dong, X. X. ;
Shen, Y. F. ;
Jia, N. ;
Xiue, W. Y. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 869
[9]   An investigation on morphology and structure of Cu-Cr alloy powders prepared by mechanical milling and alloying [J].
Fang, Qiang ;
Kang, Zhixin .
POWDER TECHNOLOGY, 2015, 270 :104-111
[10]   Precipitation hardening of Cu-Fe-Cr alloys - Part I - Mechanical and electrical properties [J].
Fernee, H ;
Nairn, J ;
Atrens, A .
JOURNAL OF MATERIALS SCIENCE, 2001, 36 (11) :2711-2719