Influence of natural aging and pre-treatment on the precipitation and age-hardening behavior of Al-1.0Mg-0.65Si-0.24Cu alloy

被引：23
作者：
Jin, Shuoxun [1 ]
Ngai, Tungwai [1 ]
Li, Liejun [1 ]
Lai, Yuxiang [2 ]
Chen, Zimo [1 ]
Wang, Andi [3 ]
机构：
[1] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Technol, Guangzhou 510640, Guangdong, Peoples R China
[2] Hunan Univ, Coll Mat Sci & Engn, Ctr High Resolut Electron Microscopy, Changsha 410082, Hunan, Peoples R China
[3] South China Univ Technol, Analyt & Testing Ctr, Guangzhou 510640, Guangdong, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 742卷
基金：
中国国家自然科学基金;
关键词：
Al-Mg-Si-Cu alloy; Pre-treatment; Age-hardening behavior; Transmission electron microscopy; MG-SI ALLOY; CU ALLOY; CRYSTAL-STRUCTURE; PHASE; DEFORMATION; IMPROVE; BETA''; TEMPERATURES; SEQUENCE; REVERSAL;
D O I：
10.1016/j.jallcom.2017.10.005
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：
Replacing steel plate with aluminum alloy as automotive structural parts is a cost-effective way to reduce body weight. The effect of 5% deformation thorn pre-aging treatment (170 degrees C, 190 degrees C, 210 degrees C for 10 min) on natural aging, subsequent artificial age-hardening of an Al-1.0Mg-0.65Si-0.24Cu alloy were studied by hardness measurement, differential scanning calorimetric (DSC), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) analysis. The formation of clusters induced by natural aging decrease the size and density of beta '' phase during subsequent artificial aging, which results in a decline of peak-aging hardness. The immediate pre-treatment after quenching completely suppressed the negative effect of natural aging. In addition, it significantly increased the peak-aging hardness (higher than T6 peak-aging condition) and shortened the time (by 50%) to reach peak hardness of the alloy during subsequent artificial aging. The pre-treatment generated the beta ''-nuclei to be readily transform into beta '' phase during artificial aging. The two types of disordered precipitates formed during the pre-treatment continued to grow with the process of subsequent artificial aging and played an important part in strengthening the alloy. (c) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：852 / 859
页数：8
相关论文
共 28 条
[11]   Early-stage Precipitation Phenomena and Composition-dependent Hardening in Al-Mg-Si-(Cu) Alloys [J].
Fallah, Vahid ;
Korinek, Andreas ;
Raeisinia, Babak ;
Gallerneault, Mark ;
Esmaeili, Shahrzad .
ALUMINIUM ALLOYS 2014 - ICAA14, 2014, 794-796 :933-+
[12]   Atomic-scale pathway of early-stage precipitation in Al-Mg-Si alloys [J].
Fallah, Vahid ;
Korinek, Andreas ;
Ofori-Opoku, Nana ;
Raeisinia, Babak ;
Gallerneault, Mark ;
Provatas, Nikolas ;
Esmaeili, Shahrzad .
ACTA MATERIALIA, 2015, 82 :457-467
[13]   LIGHTWEIGHT MATERIALS FOR AIRCRAFT APPLICATIONS [J].
IMMARIGEON, JP ;
HOLT, RT ;
KOUL, AK ;
ZHAO, L ;
WALLACE, W ;
BEDDOES, JC .
MATERIALS CHARACTERIZATION, 1995, 35 (01) :41-67
[14]   Natural-aging-induced reversal of the precipitation pathways in an Al-Mg-Si alloy [J].
Liu, C. H. ;
Lai, Y. X. ;
Chen, J. H. ;
Tao, G. H. ;
Liu, L. M. ;
Ma, P. P. ;
Wu, C. L. .
SCRIPTA MATERIALIA, 2016, 115 :150-154
[15]   A tuning nano-precipitation approach for achieving enhanced strength and good ductility in Al alloys [J].
Liu, C. H. ;
Li, X. L. ;
Wang, S. H. ;
Chen, J. H. ;
Teng, Q. ;
Chen, J. ;
Gu, Y. .
MATERIALS & DESIGN, 2014, 54 :144-148
[16]   The effect of Cu on precipitation in Al-Mg-Si alloys [J].
Marioara, C. D. ;
Andersen, S. J. ;
Stene, T. N. ;
Hasting, H. ;
Walmsley, J. ;
Van Helvoort, A. T. J. ;
Holmestad, R. .
PHILOSOPHICAL MAGAZINE, 2007, 87 (23) :3385-3413
[17]   Reversal of the negative natural aging effect in Al-Mg-Si alloys [J].
Martinsen, F. A. ;
Ehlers, F. J. H. ;
Torsaeter, M. ;
Holmestad, R. .
ACTA MATERIALIA, 2012, 60 (17) :6091-6101
[18]   High resolution energy-filtering transmission electron microscopy for equilibrium β-phase in an Al-Mg-Si alloy [J].
Matsuda, K ;
Naoi, T ;
Uetani, Y ;
Sato, T ;
Kamio, A ;
Ikeno, S .
SCRIPTA MATERIALIA, 1999, 41 (04) :379-383
[19]   Pre-treatment to Improve the Bake-hardening Response in the Naturally Aged Al-Mg-Si Alloy [J].
Shen, Chin-Hui .
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2011, 27 (03) :205-212
[20]   The influence of Mg/Si ratio on the negative natural aging effect in Al-Mg-Si-Cu alloys [J].
Tao, G. H. ;
Liu, C. H. ;
Chen, J. H. ;
Lai, Yx ;
Ma, P. P. ;
Liu, L. M. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 642 :241-248
123