Aging behaviour and mechanical properties of a solution treated and ECAP processed 6082 alloy

被引：27
作者：
Angella, G
Bassani, P
Tuissi, A
Vedani, M
机构：
[1] CNR, Inst Energet & Interphases, CNR, IENI, I-20125 Milan, Italy
[2] CNR, Inst Energet & Interphases, CNR, IENI, I-23900 Lecce, Italy
[3] Politecn Milan, Dipartimento Meccan, I-20058 Milan, Italy
来源：
MATERIALS TRANSACTIONS | 2004年 / 45卷 / 07期
关键词：
6082; alloy; ultrafine structure; aging kinetics; mechanical properties;
D O I：
10.2320/matertrans.45.2282
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A study was carried out on the aging behaviour of a solution treated 6082 aluminium alloy deformed by equal channel angular pressing up to six passes. Aging of the so obtained ultrafine alloy was studied by DSC and TEM analyses as well as by isothermal treatments at 130, 160 and 180degreesC. The results showed that the formation of metastable beta" and beta' precipitates were markedly anticipated and that the stable beta phase was partially suppressed in the alloy processed to 4 and 6 passes, presumably due to anticipated precipitation of Si-rich particles. TEM analyses revealed that a transition in strengthening-precipitate structure occurred in the severely deformed alloy leading to a predominance of globular precipitates over the rod like phases typically found in the undeformed and aged samples. Tensile tests carried out on severely deformed and aged samples allowed to quantify the maximum strength achievable by the 6082 alloy after concurrent grain refinement and peak-hardness aging at 130degreesC.
引用
收藏
页码：2282 / 2287
页数：6
相关论文
共 25 条
[1]   Stability of nanostructured materials [J].
Andrievski, RA .
JOURNAL OF MATERIALS SCIENCE, 2003, 38 (07) :1367-1375
[2]   Precipitation kinetics of AA4032 and AA6082: A comparison based on DSC and TEM [J].
Biroli, G ;
Caglioti, G ;
Martini, L ;
Riontino, G .
SCRIPTA MATERIALIA, 1998, 39 (02) :197-203
[3]   Improvement of high-cycle fatigue life in a 6061 Al alloy produced by equal channel angular pressing [J].
Chung, CS ;
Kim, JK ;
Kim, HK ;
Kim, WJ .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 337 (1-2) :39-44
[4]   The precipitation sequence in Al-Mg-Si alloys [J].
Edwards, GA ;
Stiller, K ;
Dunlop, GL ;
Couper, MJ .
ACTA MATERIALIA, 1998, 46 (11) :3893-3904
[5]   Synthesis of nanocrystalline materials - an overview [J].
Froes, FH ;
Senkov, ON ;
Baburaj, EG .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 301 (01) :44-53
[6]   The effect of strain path on the development of deformation structures in severely deformed aluminium alloys processed by ECAE [J].
Gholinia, A ;
Prangnell, PB ;
Markushev, MV .
ACTA MATERIALIA, 2000, 48 (05) :1115-1130
[7]   Precipitation hardening in Al-Mg-Si alloys with and without excess Si [J].
Gupta, AK ;
Lloyd, DJ ;
Court, SA .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 316 (1-2) :11-17
[8]   Improvement of mechanical properties for Al alloys using equal-channel angular pressing [J].
Horita, Z ;
Fujinami, T ;
Nemoto, M ;
Langdon, TG .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2001, 117 (03) :288-292
[9]   Development of fine grained structures using severe plastic deformation [J].
Horita, Z ;
Furukawa, M ;
Nemoto, M ;
Langdon, TG .
MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (11-12) :1239-1245
[10]   The process of grain refinement in equal-channel angular pressing [J].
Iwahashi, Y ;
Horita, Z ;
Nemoto, M ;
Langdon, TG .
ACTA MATERIALIA, 1998, 46 (09) :3317-3331
123