Strength and biaxial formability of cryo-rolled 2024 aluminium subject to concurrent recovery and precipitation

被引：41
作者：
Weiss, M. [1 ]
Taylor, A. S. [1 ]
Hodgson, P. D. [1 ]
Stanford, N. [1 ]
机构：
[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3217, Australia
来源：
ACTA MATERIALIA | 2013年 / 61卷 / 14期
关键词：
Aluminium; Cluster hardening; Precipitation; Fine grained; Formability; AL-CU-MG; HIGH-PRESSURE TORSION; MECHANICAL-PROPERTIES; PURE ALUMINUM; ALLOYS; DUCTILITY;
D O I：
10.1016/j.actamat.2013.05.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The precipitate-hardenable aluminium alloy 2024 has been processed by rolling to develop a fine microstructure. Four alloy conditions were tested; these included two rolling temperatures and two different ageing sequences. For all four conditions there was an ideal heat-treatment time at which there was a concurrent improvement in both strength and formability. Microstructural modeling has shown that this is the result of a small processing window in which the hardening due to precipitation is larger than the softening due to recovery, while the detrimental effects of particle coarsening on ductility have not yet developed. Cryo-rolling and room-temperature rolling produced materials with similar strengths, but cryo-rolling showed inferior formability. Natural ageing before rolling significantly decreased the formability compared to rolling in the supersaturated condition, and it is proposed that the solute clusters that develop during natural aging inhibit dynamic recovery and consequently increase the dislocation density that develops during rolling. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：5278 / 5289
页数：12
相关论文
共 26 条
[1]  
[Anonymous], 2003, 20482 ISO
[2]  
[Anonymous], 2009, STRAIN ANAL SYSTEM A
[3]   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
[4]   Improving the mechanical properties of 2024 Al alloy by cryo rolling [J].
Doppalapudi, Devaiah ;
Venkatachalam, P. ;
Kumar, S. Ramesh ;
Ravisankar, B. ;
Jayashankar, K. .
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, 2010, 63 (01) :31-34
[5]   Precipitation process along dislocations in Al-Cu-Mg alloy during artificial aging [J].
Feng, Zongqiang ;
Yang, Yanqing ;
Huang, Bin ;
Han, Ming ;
Luo, Xian ;
Ru, Jigang .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 528 (02) :706-714
[6]   Microstructural response of pure copper to cryogenic rolling [J].
Konkova, T. ;
Mironov, S. ;
Korznikov, A. ;
Semiatin, S. L. .
ACTA MATERIALIA, 2010, 58 (16) :5262-5273
[7]  
Mabuchi M, 1998, J MATER SCI LETT, V17, P215, DOI 10.1023/A:1006584211768
[8]   A study on the mechanical properties of cryorolled Al-Mg-Si alloy [J].
Panigrahi, Sushanta Kumar ;
Jayaganthan, R. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 480 (1-2) :299-305
[9]   Influence of solutes and second phase particles on work hardening behavior of Al 6063 alloy processed by cryorolling [J].
Panigrahi, Sushanta Kumar ;
Jayaganthan, R. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (7-8) :3147-3160
[10]   Hardening of an Al-Cu-Mg alloy containing Types I and II S phase precipitates [J].
Parel, T. S. ;
Wang, S. C. ;
Starink, M. J. .
MATERIALS & DESIGN, 2010, 31 :S2-S5
123