The effect of initial aging treatment on the microstructure and mechanical properties of cryorolled 6016 Al alloy

被引：27
作者：
Chen, X. P. [1 ]
Mei, L. [1 ]
Chen, D. [1 ]
Bao, Z. L. [1 ]
Liu, Q. [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 667卷
基金：
中国国家自然科学基金; 对外科技合作项目（国际科技项目）;
关键词：
6016 Al alloy; Pre-aging; Cryorolling; Microstructure; Mechanical properties; MG-SI ALLOYS; AUTOMOTIVE APPLICATIONS; ENHANCED STRENGTH; CRYSTAL-STRUCTURE; ALUMINUM-ALLOYS; CU ALLOY; DUCTILITY; PRECIPITATION; PHASE; SHEET;
D O I：
10.1016/j.msea.2016.04.099
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of pre-aging and peak-aging treatments prior to cryorolling on the microstructure and mechanical properties of 6016 Al alloys were investigated by hardness measurements, tensile tests, differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). The results showed that high density of dislocation was induced by cryorolling with 80% thickness reduction. The pre-aging treatment enabled the alloy to have stronger work hardening effect during cryorolling and higher precipitation potential during subsequent aging than the peak-aging treatment. This was due to that the pre aging enhanced the dislocations accumulating in the cryorolling of pre-aged specimen, and promoted the secondary precipitation during subsequent aging after cryorolling. Meanwhile, the yield strength and ultimate tensile strength of the pre-aged specimen subjected to cryorolling and subsequent aging significantly increased by 72% and 50%, respectively, while the ductility remained similar, as compared to the conventional peak-aged specimen. (c) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：311 / 316
页数：6
相关论文
共 28 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]   Bake hardening of twin roll cast At-Mg-Si sheet [J].
Birol, Y ;
Karlík, M .
MATERIALS SCIENCE AND TECHNOLOGY, 2005, 21 (02) :153-158
[3]   Secondary precipitation in an Al-Mg-Si-Cu alloy [J].
Buha, J. ;
Lumley, R. N. ;
Crosky, A. G. ;
Hono, K. .
ACTA MATERIALIA, 2007, 55 (09) :3015-3024
[4]   Microstructural development and mechanical properties of interrupted aged Al-Mg-Si-Cu alloy [J].
Buha, J. ;
Lumley, R. N. ;
Crosky, A. G. .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2006, 37A (10) :3119-3130
[5]   Natural aging behavior of AA7050 Al alloy after cryogenic rolling [J].
Camilo Magalhaes, Danielle Cristina ;
Hupalo, Marcio Ferreira ;
Cintho, Osvaldo Mitsuyuki .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 593 :1-7
[6]   Optimizing the strength and ductility of fine structured 2024 Al alloy by nano-precipitation [J].
Cheng, S. ;
Zhao, Y. H. ;
Zhu, Y. T. ;
Ma, E. .
ACTA MATERIALIA, 2007, 55 (17) :5822-5832
[7]   Optimization of the pre-aging treatment for an AA6022 alloy at various temperatures and holding times [J].
Ding, Lipeng ;
He, Yang ;
Wen, Zhang ;
Zhao, Pizhi ;
Jia, Zhihong ;
Liu, Qing .
JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 647 :238-244
[8]   A CALORIMETRIC STUDY OF PRECIPITATION IN COMMERCIAL ALUMINUM ALLOY-6061 [J].
DUTTA, I ;
ALLEN, SM .
JOURNAL OF MATERIALS SCIENCE LETTERS, 1991, 10 (06) :323-326
[9]   The precipitation sequence in Al-Mg-Si alloys [J].
Edwards, GA ;
Stiller, K ;
Dunlop, GL ;
Couper, MJ .
ACTA MATERIALIA, 1998, 46 (11) :3893-3904
[10]   Texture control by thermomechanical processing of AA6xxx Al-Mg-Si sheet alloys for automotive applications -: a review [J].
Engler, O ;
Hirsch, J .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 336 (1-2) :249-262
123