Influences of aging temperature and time on microstructure and mechanical properties of 6005A aluminum alloy extrusions

被引：10

作者：

Ding Xian-fei ^{[1
]}

Sun Jing ^{[2
]}

Ying Jia ^{[1
]}

Zhang Wei-dong ^{[1
]}

Ma Ji-jun ^{[2
]}

Wang Li-chen ^{[3
]}

机构：

[1] Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China

[2] Tangshan Railway Vehicle Co Ltd, Tangshan 063035, Peoples R China

[3] Jilin Midas Aluminum Ind Co Ltd, Liaoyuan 136200, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷

关键词：

6005A aluminum alloy; extrusion; aging; Al(Fe; Cr)Si particles; AlFeSi particles; microstructure; mechanical properties; FRICTION STIR WELDS; PRECIPITATION; MICROSCOPY;

D O I：

10.1016/S1003-6326(12)61677-X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influences of aging time and aging temperature on the microstructure and mechanical properties were investigated on the 6005A aluminum alloy extrusions. Artificial aging was performed on the alloy extrusions. The aging times were 4, 8 and 12 h, and the aging temperatures were 150, 175 and 200 degrees C. The results show that the morphologies of the coarse Al(Fe,Cr) Si particles formed in the extrusion process are evolved from granular to rod-like particles with the increase of the aging temperature or the aging time. The volume fraction of the submicron precipitates reaches the maximum value at the aging temperature of 175 degrees C. AlFeSi particles in size of 1-3 mu m are precipitated at the grain boundaries at the aging temperature of 200 degrees C. The room temperature mechanical properties of the extrusions are more sensitive to the aging temperature than to the aging time. The optimum and stable mechanical properties are achieved when the aging procedure 175 degrees C, 4-8 h has been performed on the extrusions. The tensile strength and the yield strength in the longitudinal direction of the aged extrusions are more than 300 MPa and 270 MPa, respectively.

引用

页码：S14 / S20

页数：7

共 18 条

[1]

Cai Junhui, 2008, Shanghai Metals, V30, P16

[2]

DENG Xiao-san, 2004, ALUMINUM FABRICATION, V19, P19

[3] Characterization of the α-Al(FeMn)Si nuclei on β-AlFeSi intermetallics by laser scanning confocal microscopy [J].

Kuijpers, NCW ;

Tirel, J ;

Hanlon, DN ;

van der Zwaag, S .

JOURNAL OF MATERIALS SCIENCE LETTERS, 2003, 22 (20) :1385-1387

[4]

Liu J.A., 2004, LIGHT ALLOY FABRICAT, V32, P36

[5]

Lizi He, 2001, MICROSTRUCTURES MECH

[6] Continuous cooling precipitation diagrams of Al-Mg-Si alloys [J].

Milkereit, Benjamin ;

Wanderka, Nelia ;

Schick, Christoph ;

Kessler, Olaf .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 550 :87-96

[7]

Polmear IJ, 2006, LIGHT ALLOYS TRADITI, P43

[8]

SHEN Jian, 2003, CHINESE J NONFERROUS, V13, P60

[9] Microstructure, local and global mechanical properties of friction stir welds in aluminium alloy 6005A-T6 [J].

Simar, A. ;

Brechet, Y. ;

de Meester, B. ;

Denquin, A. ;

Pardoen, T. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 486 (1-2) :85-95

[10] Sequential modeling of local precipitation, strength and strain hardening in friction stir welds of an aluminum alloy 6005A-T6 [J].

Simar, A. ;

Brechet, Y. ;

de Meester, B. ;

Denquin, A. ;

Pardoen, T. .

ACTA MATERIALIA, 2007, 55 (18) :6133-6143

← 1 2 →