Effect of quenching rate on microstructure and stress corrosion cracking of 7085 aluminum alloy

被引：77

作者：

Chen Song-yi ^{[1
]}

Chen Kang-hua ^{[1
]}

Peng Guo-sheng ^{[1
]}

Liang Xin ^{[1
]}

Chen Xue-hai ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 01期

基金：

中国国家自然科学基金;

关键词：

7085 aluminum alloy; quenching rate; microstructure; stress corrosion cracking; ZN-MG ALLOY; HYDROGEN EMBRITTLEMENT; SCC-RESISTANCE; STRENGTH; AA7050; RETROGRESSION; TOUGHNESS;

D O I：

10.1016/S1003-6326(11)61138-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of quenching rate on microstructure and stress corrosion cracking (SCC) of 7085 aluminum alloy was investigated by tensile test, slow strain rate test (SSRT), combined with scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electrochemical test. The results show that with decreasing the quenching rate, the size and inter-particle distance of the grain boundary precipitates as well as precipitation free zone width increase, but the copper content of grain boundary precipitates decreases. The SCC resistance of the samples increases first and then decreases, which is attributed to the copper content, size and distribution of grain boundary precipitates.

引用

页码：47 / 52

页数：6

共 24 条

[1] HYDROGEN EMBRITTLEMENT AND TRAPPING IN AL-6-PERCENT-ZN-3-PERCENT-MG [J].

CHRISTODOULOU, L ;

FLOWER, HM .

ACTA METALLURGICA, 1980, 28 (04) :481-487

[2] Influence of cooling rate on the precipitation microstructure in a medium strength Al-Zn-Mg alloy [J].

Deschamps, A. ;

Texier, G. ;

Ringeval, S. ;

Delfaut-Durut, L. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 501 (1-2) :133-139

[3] GRAIN-STRUCTURE AND QUENCH-RATE EFFECTS ON STRENGTH AND TOUGHNESS OF AA7050 AL-ZN-MG-CU-ZR ALLOY PLATE [J].

DORWARD, RC ;

BEERNTSEN, DJ .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1995, 26 (09) :2481-2484

[4] On the relationship between microstructure, strength and toughness in AA7050 aluminum alloy [J].

Dumont, D ;

Deschamps, A ;

Brechet, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 356 (1-2) :326-336

[5]

He Yong-dong, 2006, Chinese Journal of Nonferrous Metals, V16, P392

[6] Recent development in aluminium alloys for aerospace applications [J].

Heinz, A ;

Haszler, A ;

Keidel, C ;

Moldenhauer, S ;

Benedictus, R ;

Miller, WS .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 280 (01) :102-107

[7] Influence of high-temperature pre-precipitation on local corrosion behaviors of Al-Zn-Mg alloy [J].

Huang, L. P. ;

Chen, K. H. ;

Li, S. ;

Song, M. .

SCRIPTA MATERIALIA, 2007, 56 (04) :305-308

[8] Correlations between intergranular stress corrosion cracking, grain-boundary microchemistry, and grain-boundary electrochemistry for Al-Zn-Mg-Cu alloys [J].

Knight, S. P. ;

Birbilis, N. ;

Muddle, B. C. ;

Trueman, A. R. ;

Lynch, S. P. .

CORROSION SCIENCE, 2010, 52 (12) :4073-4080

[9] Effect of pre-immersion on the SCC of heat-treated AA7050 in an alkaline 3.5%NaCl [J].

Liao, Hsueh-Lung ;

Lin, Jing-Chie ;

Lee, Sheng-Long .

CORROSION SCIENCE, 2009, 51 (02) :209-216

[10] Effect of heat treatments on the tensile strength and SCC-resistance of AA7050 in an alkaline saline solution [J].

Lin, Jing-Chie ;

Liao, Hsueh-Lung ;

Jehng, Wern-Dare ;

Chang, Chih-Horng ;

Lee, Sheng-Long .

CORROSION SCIENCE, 2006, 48 (10) :3139-3156

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