A good combination of strength and ductility of ultra-coarse-grained Cu-Al alloy with coarse-grained surface layer via pre-torsional treatment

被引：11
作者：
Gong, Yanli [1 ]
Gu, Ji [2 ]
Ni, Song [2 ]
Wu, Hong [2 ,3 ]
Song, Min [2 ]
机构：
[1] Hunan Ind Polytech, Dept Automobile Engn, Changsha 410082, Peoples R China
[2] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[3] Shenzhen Zhong Jin Ling Nan Nonfemet Co Ltd, Shenzhen 518040, Peoples R China
来源：
MICRON | 2020年 / 129卷
基金：
中国国家自然科学基金;
关键词：
Cu-Al alloy; Strength; Ductility; Gradient structure; HIGH-PRESSURE TORSION; MECHANICAL-PROPERTIES; STAINLESS-STEEL; DEFORMATION; MICROSTRUCTURES; AUSTENITE;
D O I：
10.1016/j.micron.2019.102783
中图分类号：
TH742 [显微镜];
学科分类号：
摘要：
The trade-off between strength and ductility is a long-standing dilemma in metals and alloys. In this study, we fabricated an ultra-coarse-grained (UCG) Cu-6 wt.%Al alloy with a coarse-grained (CG) surface layer by surface mechanical attrition treatment. Pre-torsional treatment for 45 degrees, 90 degrees and 180 degrees was conducted on the UCG-CG specimens, and the effects of pre-torsional treatment on the microstructures and mechanical properties of the UCG-CG Cu-6 wt.%Al alloy were systematic investigated. It has been shown that the strength and ductility can be simultaneously enhanced via pre-torsional deformation due to the formation of gradient microstructures.
引用
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页数：5
相关论文
共 28 条
[1]   Significance of stacking fault energy in bulk nanostructured materials: Insights from Cu and its binary alloys as model systems [J].
An, X. H. ;
Wu, S. D. ;
Wang, Z. G. ;
Zhang, Z. F. .
PROGRESS IN MATERIALS SCIENCE, 2019, 101 :1-45
[2]   Enhanced cyclic deformation responses of ultrafine-grained Cu and nanocrystalline Cu-Al alloys [J].
An, X. H. ;
Wu, S. D. ;
Wang, Z. G. ;
Zhang, Z. F. .
ACTA MATERIALIA, 2014, 74 :200-214
[3]   Enhanced strength-ductility synergy in nanostructured Cu and Cu-Al alloys processed by high-pressure torsion and subsequent annealing [J].
An, X. H. ;
Wu, S. D. ;
Zhang, Z. F. ;
Figueiredo, R. B. ;
Gao, N. ;
Langdon, T. G. .
SCRIPTA MATERIALIA, 2012, 66 (05) :227-230
[4]   Concurrent microstructural evolution of ferrite and austenite in a duplex stainless steel processed by high-pressure torsion [J].
Cao, Y. ;
Wang, Y. B. ;
An, X. H. ;
Liao, X. Z. ;
Kawasaki, M. ;
Ringer, S. P. ;
Langdon, T. G. ;
Zhu, Y. T. .
ACTA MATERIALIA, 2014, 63 :16-29
[5]   Three-dimensional shear-strain patterns induced by high-pressure torsion and their impact on hardness evolution [J].
Cao, Y. ;
Wang, Y. B. ;
Figueiredo, R. B. ;
Chang, L. ;
Liao, X. Z. ;
Kawasaki, M. ;
Zheng, W. L. ;
Ringer, S. P. ;
Langdon, T. G. ;
Zhu, Y. T. .
ACTA MATERIALIA, 2011, 59 (10) :3903-3914
[6]   Structural evolutions of metallic materials processed by severe plastic deformation [J].
Cao, Yang ;
Ni, Song ;
Liao, Xiaozhou ;
Song, Min ;
Zhu, Yuntian .
MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2018, 133 :1-59
[7]   Revealing Extraordinary Intrinsic Tensile Plasticity in Gradient Nano-Grained Copper [J].
Fang, T. H. ;
Li, W. L. ;
Tao, N. R. ;
Lu, K. .
SCIENCE, 2011, 331 (6024) :1587-1590
[8]   Mechanical properties of DLC coating sputter deposited on surface nanocrystallized 304 stainless steel [J].
Fu, T. ;
Zhou, Z. F. ;
Zhou, Y. M. ;
Zhu, X. D. ;
Zeng, Q. F. ;
Wang, C. P. ;
Li, K. Y. ;
Lu, J. .
SURFACE & COATINGS TECHNOLOGY, 2012, 207 :555-564
[9]  
Gu J, 2019, MATER RES-IBERO-AM J, V22, DOI [10.1590/1980-5373-MR-2018-0424, 10.1590/1980-5373-mr-2018-0424]
[10]   Effects of Torsional Deformation on the Mechanical Properties and Microstructures of a Commercial Pure Copper [J].
Gu, Ji ;
Ni, Song ;
Song, Min .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2019, 28 (01) :543-548
123