Microstructure and mechanical properties of Al-Mg-Li-Sc-Zr alloy processed by spray deposition and thermo-mechanical processes

被引：5
作者：
Kuang, Quanbo [1 ]
Wang, Richu [1 ,2 ]
Peng, Chaoqun [1 ]
Cai, Zhiyong [1 ,2 ]
机构：
[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[2] Cent South Univ, Natl Key Lab Sci & Technol Natl Def High Strength, Changsha 410083, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2020年 / 169卷
基金：
中国博士后科学基金;
关键词：
Spray deposition; Al-Mg-Li-Sc-Zr alloy; Microstructure; Aging; Precipitation; Mechanical properties; ALUMINUM; EVOLUTION; DEFORMATION; DUCTILITY; AEROSPACE; STRENGTH;
D O I：
10.1016/j.matchar.2020.110614
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al-Mg-Li-Sc-Zr alloy was prepared by spray deposition followed by extrusion and heat treatment processes. The effects of aging temperature on microstructure, phase transformation, and mechanical properties of the alloy were studied. The results show that the extruded alloy presents a typical fibrous structure with large amounts of secondary phases distributed along the extrusion direction. After solution and aging treatments, recrystallized structures are founded in the alloy, and the proportion of large size grains increases with the aging temperature increasing. TEM observation shows that the delta '(Al3Li) phase particles are homogeneously distributed in the Al matrix, leading to a significant enhancement of tensile strength. The yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) of the alloy after aging at 120 degrees C for 20 h reach 492.3 +/- 9 MPa, 568.2 +/- 6 MPa, and 5.8% +/- 0.25, respectively. When the aging temperature rises from 120 to 160 degrees C,the dispersed delta ' phases are coarsened gradually and the continuous striped S1(Al2MgLi) phases are observed at the grain boundaries, which causes the declination of strength and elongation of the alloy.
引用
收藏
页数：10
相关论文
共 37 条
[1]   Effect of the composition of Al-Li alloys on the quantitative relation between the δ′(Al3Li), S1(Al2MgLi), and T1(Al2CuLi) phases [J].
Betsofen S.Y. ;
Antipov V.V. ;
Grushin I.A. ;
Knyazev M.I. ;
Khokhlatova L.B. ;
Alekseev A.A. .
Russian Metallurgy (Metally), 2015, 2015 (01) :51-58
[2]   Microstructural evolution and mechanical properties of cast Al-3Li-1.5Cu-0.2Zr alloy during heat treatment [J].
Chen, Antao ;
Peng, Yu ;
Zhang, Liang ;
Wu, Guohua ;
Li, Yanlei .
MATERIALS CHARACTERIZATION, 2016, 114 :234-242
[3]   Modern Al-Li alloys and prospects of their development [J].
Elagin, V. I. ;
Zakharov, V. V. .
METAL SCIENCE AND HEAT TREATMENT, 2013, 55 (3-4) :184-190
[4]   Thermal stability of Al3(Scx,Zr1-x)-dispersoids in extruded aluminium alloys [J].
Forbord, B. ;
Hallem, H. ;
Royset, J. ;
Marthinsen, K. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 475 (1-2) :241-248
[5]   Thermally stable aluminum-lithium alloy 1424 for application in welded fuselage [J].
Fridlyander, IN ;
Khokhlatova, LB ;
Kolobnev, NI ;
Rendiks, K ;
Tempus, G .
METAL SCIENCE AND HEAT TREATMENT, 2002, 44 (1-2) :3-8
[6]   STRENGTHENING MECHANISMS IN AL-LI ALLOYS CONTAINING COHERENT ORDERED PARTICLES [J].
FURUKAWA, M ;
MIURA, Y ;
NEMOTO, M .
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1985, 26 (04) :230-235
[7]   MICROSTRUCTURE AND FRACTURE CHARACTERISTICS OF RAPIDLY SOLIDIFIED AL-LI-MG ALLOYS CONTAINING 4 AND 5 WT-PERCENT LI [J].
GAILLARD, MC ;
WERT, JA .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1990, 125 (01) :89-96
[8]   Processing, microstructure and property aspects of a spraycast Al-Mg-Li-Zr [J].
Hogg, S. C. ;
Palmer, I. G. ;
Thomas, L. G. ;
Grant, P. S. .
ACTA MATERIALIA, 2007, 55 (06) :1885-1894
[9]   An investigation of novel spraycast AI-Mg-Li-Zr-(Sc) alloys [J].
Hogg, S. C. ;
Palmer, I. G. ;
Grant, P. S. .
ALUMINIUM ALLOYS 2006, PTS 1 AND 2: RESEARCH THROUGH INNOVATION AND TECHNOLOGY, 2006, 519-521 :1629-1634
[10]   Texture and Anisotropy of the Mechanical Properties of an Al-Mg-Li-Zn-Sc-Zr Alloy [J].
Il'in, A. A. ;
Zakharov, V. V. ;
Betsofen, M. S. ;
Osintsev, O. E. ;
Rostova, T. D. .
RUSSIAN METALLURGY, 2008, 2008 (05) :406-412
1234