Grain refinement and high strain rate superplasticity in alumunium 2024 alloy processed by high-pressure torsion

被引：60
作者：
Alhamidi, Ali [1 ,2 ]
Horita, Zenji [1 ,2 ]
机构：
[1] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8190395, Japan
[2] Kyushu Univ, VVPI, Int Inst Carbon Neutral Energy Res WPI I2CNER, WPI, Fukuoka 8190395, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 622卷
基金：
日本科学技术振兴机构;
关键词：
Severe plastic deformation (SPD); High-pressure torsion (HPT); Ultrafine-grained (UFG) materials; High strain rate superplasticity (HSRS); Al-Cu Alloy; SEVERE PLASTIC-DEFORMATION; ALUMINUM-ALLOY; MATRIX COMPOSITES; AL-ALLOY; BEHAVIOR; ZIRCONIUM; FLOW; TEMPERATURES; ADDITIONS; SCANDIUM;
D O I：
10.1016/j.msea.2014.11.009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An Al-2024 alloy was processed by high-pressure torsion (HPT) to produce an ultrafine-grained structure with a grain size of similar to 240 nm. A maximum elongation of similar to 750% was attained with an initial strain rate of 1 x 10(-2) s(-1) at 673 K, demonstrating the advent of high strain rate superplasticity through grain refinement by the HPT processing. Evaluation of the strain-rate sensitivity and the activation energy for the deformation confirmed that grain boundary sliding through grain boundary diffusion is the rate-controlling process for the superplastic deformation of the HPT-processed Al-2024 alloy. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：139 / 145
页数：7
相关论文
共 39 条
[1]   Effect of temperature on solid-state formation of bulk nanograined intermetallic Al3Ni during high-pressure torsion [J].
Alhamidi, Ali ;
Edalati, Kaveh ;
Iwaoka, Hideaki ;
Horita, Zenji .
PHILOSOPHICAL MAGAZINE, 2014, 94 (09) :876-887
[2]  
[Anonymous], 1990, DIFFUSION SOLID META
[3]   Fabrication of metal-matrix composites by application of the superplasticity effect [J].
Astanin, VV ;
Kaibyshev, OA ;
Imayeva, LA ;
Sirenko, AA .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 1997, 6 (04) :461-468
[4]   Superplastic forming 40 years and still growing [J].
Barnes, A. J. .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2007, 16 (04) :440-454
[5]   High-strain-rate superplasticity in aluminum matrix composites [J].
Bieler, TR ;
Mishra, RS ;
Mukherjee, AK .
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1996, 48 (02) :52-57
[6]  
Chant I., 2003, MAT SCI ENG A-STRUCT, V359, P290
[7]   Grain refinement and superplastic flow in an aluminum alloy processed by high-pressure torsion [J].
Dobatkin, SV ;
Bastarache, EN ;
Sakai, G ;
Fujita, T ;
Horita, Z ;
Langdon, TG .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 408 (1-2) :141-146
[8]   In situ production of bulk intermetallic-based nanocomposites and nanostructured intermetallics by high-pressure torsion [J].
Edalati, Kaveh ;
Toh, Shoichi ;
Watanabe, Masashi ;
Horita, Zenji .
SCRIPTA MATERIALIA, 2012, 66 (06) :386-389
[9]   Plastic deformation and allotropic phase transformations in zirconia ceramics during high-pressure torsion [J].
Edalati, Kaveh ;
Toh, Shoichi ;
Ikoma, Yoshifumi ;
Horita, Zenji .
SCRIPTA MATERIALIA, 2011, 65 (11) :974-977
[10]   Achieving superplastic behavior in fcc and hcp metals processed by equal-channel angular pressing [J].
Figueiredo, Roberto B. ;
Kawasaki, Megumi ;
Xu, Cheng ;
Langdon, Terence G. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 493 (1-2) :104-110
1234