Effect of Cu content on precipitation and age-hardening behavior in Al-Mg-Si-xCu alloys

被引：98

作者：

Xiao, Qiao ^{[1
,2
]}

Liu, Huiqun ^{[1
,2
]}

Yi, Danqing ^{[1
,2
]}

Yin, Deyan ^{[1
,2
]}

Chen, Yuqiang ^{[3
]}

Zhang, Ying ^{[1
,2
]}

Wang, Bin ^{[1
,2
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[3] Hunan Univ Sci & Technol, Xiangtan 411201, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

基金：

中国国家自然科学基金;

关键词：

Al-Mg-Si-Cu alloy; Cu content; Age-hardening behavior; Precipitation; PHASE; ADDITIONS; DECOMPOSITION; OPTIMIZATION;

D O I：

10.1016/j.jallcom.2016.10.221

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of varying the Cu content of Al-Mg-Si-xCu (x = 0.5, 1.0, 2.5 and 4.5, in wt.%) alloys on precipitation and their age-hardening behavior was investigated through hardness measurements, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM). The results indicated that aging at 165 degrees C, the peak aging hardness increased from 109 to 218 HV with the Cu content increasing from 0.5 to 4.5 wt%. Similarly, there was an increase in the peak aging time with Cu content. However, in over-aging stage, the hardness of 4.5Cu alloy decreased more rapidly than that of 0.5, 1.0 and 2.5Cu alloys. Furthermore, an increase in Cu content brought about an apparent change in the main precipitate of the peak-aged samples from needle-shaped beta '' phase in 0.5Cu alloy to: needle-shaped beta '' phase and granular Q' phase in 1.0Cu alloy, granular Q' phase and theta' platelets in 2.5Cu alloy, and theta' platelets with a small amount of Q' phase in 4.5Cu alloy. (C) 2016 Elsevier B. V. All rights reserved.

引用

页码：1005 / 1013

页数：9

共 30 条

[1] The crystal structure of the β" phase in Al-Mg-Si alloys [J].

Andersen, SJ ;

Zandbergen, HW ;

Jansen, J ;

Traeholt, C ;

Tundal, U ;

Reiso, O .

ACTA MATERIALIA, 1998, 46 (09) :3283-3298

[2] Pre-aging to improve bake hardening in a twin-roll cast Al-Mg-Si alloy [J].

Birol, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 391 (1-2) :175-180

[3] Phase relations and precipitation in Al-Mg-Si alloys with Cu additions [J].

Chakrabarti, DJ ;

Laughlin, DE .

PROGRESS IN MATERIALS SCIENCE, 2004, 49 (3-4) :389-410

[4] The effect of Zn on the age hardening response in an Al-Mg-Si alloy [J].

Ding, X. P. ;

Cui, H. ;

Zhang, J. X. ;

Li, H. X. ;

Guo, M. X. ;

Lin, Z. ;

Zhuang, L. Z. ;

Zhang, J. S. .

MATERIALS & DESIGN, 2015, 65 :1229-1235

[5] The precipitation sequence in Al-Mg-Si alloys [J].

Edwards, GA ;

Stiller, K ;

Dunlop, GL ;

Couper, MJ .

ACTA MATERIALIA, 1998, 46 (11) :3893-3904

[6]

ESKIN DG, 1992, Z METALLKD, V83, P762

[7] Decomposition of supersaturated solid solutions in Al-Cu-Mg-Si alloys [J].

Eskin, DG .

JOURNAL OF MATERIALS SCIENCE, 2003, 38 (02) :279-290

[8] On the precipitation-hardening behavior of the Al-Mg-Si-Cu alloy AA6111 [J].

S. Esmaeili ;

X. Wang ;

D. J. Lloyd ;

W. J. Poole .

Metallurgical and Materials Transactions A, 2003, 34 (3) :751-763

[9] Study of the developed precipitates in Al-0.63Mg-0.37Si-0.5Cu (wt.%) alloy by using DSC and TEM techniques [J].

Gaber, A. ;

Ali, A. Mossad ;

Matsuda, K. ;

Kawabata, T. ;

Yamazaki, T. ;

Ikeno, S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 432 (1-2) :149-155

[10] Composition of β′ precipitates in Al-Mg-Si alloys by atom probe tomography and first principles calculations [J].

Hasting, Hakon S. ;

Froseth, Anders G. ;

Andersen, Sigmund J. ;

Vissers, Rene ;

Walmsley, John C. ;

Marioara, Calin D. ;

Danoix, Frederic ;

Lefebvre, Williams ;

Holmestad, Randi .

JOURNAL OF APPLIED PHYSICS, 2009, 106 (12)

← 1 2 3 →