Effect of solution treatment on microstructure and mechanical properties of cast Al-3Li-1.5Cu-0.2Zr alloy

被引：20
作者：
Peng, Yu
Chen, Antao
Zhang, Liang [1 ]
Liu, Wencai
Wu, Guohua
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2016年 / 31卷 / 08期
基金：
中国国家自然科学基金;
关键词：
HEAT-TREATMENT; LI ALLOY; HOMOGENIZATION; OPTIMIZATION;
D O I：
10.1557/jmr.2016.103
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of solution treatment (ST) on the microstructure and mechanical properties of cast Al-3Li-1.5Cu-0.2Zr alloy was investigated. Results showed that the volume fraction of secondary phases (Al2Cu, Al3Li) decreased obviously after ST. It was found that the strengthening of Al-3Li-1.5Cu-0.2Zr alloy was a balance of the precipitation strengthening, residual phase strengthening and fine grain strengthening. The residual phase strengthening and fine grain strengthening decreased with increasing the solution temperature and time, while precipitation strengthening increased. After ST at 560 degrees C for 40 h, the elongation of Al-3Li-1.5Cu-0.2Zr alloy reaches the highest value of 22.1%. In addition, the tensile properties are up to the highest values, ultimate tensile strength of 359 MPa and elongation of 3.5% after optimal ST at 560 degrees C for 40 h followed by aging treatment.
引用
收藏
页码：1124 / 1132
页数：9
相关论文
共 27 条
[1]  
Drits M.E., 1972, SPLAVY TSVETN MET, V14
[2]   Recent developments in advanced aircraft aluminium alloys [J].
Dursun, Tolga ;
Soutis, Costas .
MATERIALS & DESIGN, 2014, 56 :862-871
[3]   Effects of heat treatment on the microstructure and mechanical properties of AA2618 DC cast alloy [J].
Elgallad, E. M. ;
Shen, P. ;
Zhang, Z. ;
Chen, X. -G. .
MATERIALS & DESIGN, 2014, 61 :133-140
[4]   MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF A 2091 ALLI ALLOY .2. MECHANICAL-PROPERTIES - YIELD STRESS AND WORK-HARDENING [J].
GOMIERO, P ;
BRECHET, Y ;
LOUCHET, F ;
TOURABI, A ;
WACK, B .
ACTA METALLURGICA ET MATERIALIA, 1992, 40 (04) :857-861
[5]   Effect of solution treatment on the strength and fracture toughness of aluminum alloy 7050 [J].
Han, N. M. ;
Zhang, X. M. ;
Liu, S. D. ;
He, D. G. ;
Zhang, R. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (10) :4138-4145
[6]   Effect of Alloying Elements on the Structure and Properties of Al-Li-Cu Cast Alloys [J].
Il'in, A. A. ;
Nikitin, S. L. ;
Osintsev, O. E. ;
Borisov, Yu. V. .
RUSSIAN METALLURGY, 2009, 2009 (04) :338-344
[7]   Microstructure evolution of the 1469 Al-Cu-Li-Sc alloy during homogenization [J].
Jia, Min ;
Zheng, Ziqiao ;
Gong, Zhu .
JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 614 :131-139
[8]   Microstructural characteristics and mechanical properties of Al-2.5 wt.% Li-1.2 wt.% Cu-xMg alloys [J].
Kim, Jeong-Min ;
Seong, Ki-Dug ;
Jun, Joong-Hwan ;
Shin, Keesam ;
Kim, Ki-Tae ;
Jung, Woon-Jae .
JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 434 (SPEC. ISS.) :324-326
[9]   Effect of age-forming on microstructure, mechanical and corrosion properties of a novel Al-Li alloy [J].
Li, H. Y. ;
Kang, W. ;
Lu, X. C. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 640 :210-218
[10]   Microstructural evolution during homogenization of Al-Cu-Li-Mn-Zr-Ti alloy [J].
Li, Hong-ying ;
Su, Xiong-jie ;
Yin, Hao ;
Huang, De-sheng .
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2013, 23 (09) :2543-2550
123