Enhanced mechanical properties in ultrafine grained 7075 Al alloy

被引：60
作者：
Zhao, YH
Liao, XZ
Zhu, YT
Valiev, RZ
机构：
[1] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA
[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia
来源：
JOURNAL OF MATERIALS RESEARCH | 2005年 / 20卷 / 02期
关键词：
D O I：
10.1557/JMR.2005.0057
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Highest strength for 7075 Al alloy was obtained by combining the equal-channel-angular pressing (ECAP) and natural aging processes. The tensile yield strength and ultimate strength of the ECAP processed and naturally aged sample were 103% and 35% higher, respectively, than those of the coarse-grained 7075 Al alloy counterpart. The enhanced strength resulted from high densities of Guinier-Preston (G-P) zones and dislocations. This study shows that severe plastic deformation has the potential to significantly enhance the mechanical properties of precipitate hardening 7000 series Al alloys.
引用
收藏
页码：288 / 291
页数：4
相关论文
共 20 条
[1]   AGE HARDENING BEHAVIOR OF TMT PROCESSED AL-ZN-MG-CU ALLOY [J].
CONSERVA, M ;
BURATTI, M ;
DIRUSSO, E ;
GATTO, F .
MATERIALS SCIENCE AND ENGINEERING, 1973, 11 (02) :103-112
[2]  
DIRUSSO E, 1973, METALL TRANS, V4, P1133, DOI 10.1007/BF02645618
[3]   NUCLEATION OF PRECIPITATES - SYSTEM AL-ZN-MG [J].
EMBURY, JD ;
NICHOLSON, RB .
ACTA METALLURGICA, 1965, 13 (04) :403-+
[4]  
GUBICZA J, 2003, MATER SCI FORUM, V229, P414
[5]   Principle of equal-channel angular pressing for the processing of ultra-fine grained materials [J].
Iwahashi, Y ;
Wang, JT ;
Horita, Z ;
Nemoto, M ;
Langdon, TG .
SCRIPTA MATERIALIA, 1996, 35 (02) :143-146
[6]  
KELLY A, 1963, PROG MATER SCI, V10, P151
[7]   Microstructure of severely deformed Al-3Mg and its evolution during annealing [J].
Morris, DG ;
Muñoz-Morris, MA .
ACTA MATERIALIA, 2002, 50 (16) :4047-4060
[8]  
SMITH WF, 1970, METALL TRANS, V1, P979
[9]  
SMITH WF, 1993, STRUCTURE PROPERTIES, P209
[10]  
THOMAS G, 1959, J I MET, V88, P81
12