Microstructural evolution of aluminum alloy 7B04 thick plate by various thermal treatments

被引：22

作者：

李志辉

熊柏青

张永安

朱宝宏

王锋

刘红伟

机构：

[1] StateKeyLaboratoryforFabricationandProcessingofNon-ferrousMetals,GeneralResearchInstituteforNon-ferrousMetals

来源：

TransactionsofNonferrousMetalsSocietyofChina | 2008年 / 01期

关键词：

Al alloy; 7B04 aluminum alloy microstructure; TEM; DSC; properties;

D O I：

暂无

中图分类号：

TG146.21 [];

学科分类号：

080502 ;

摘要：

The microstructure of an AA 7B04 alloy in the form of plate was investigated using differential scanning calorimetry(DSC)and TEM analysis technologies.Tensile properties and electrical conductivity of AA 7B04 under various heat treatment conditions were also presented.The results reveal that peak-aged microstructure contains GP zones and η' precipitates predominantly.After retrogressing and reaging(RRA),the η' and η precipitates disperse in the alloy matrix,and the η precipitates distribute coarsely and sparsely,decorating the grain boundaries,together with precipitate free zones(PFZs)around them.It is also shown that selecting of suitable heat treatments can provide optimal precipitates in matrix and at grain boundaries,which gives rise to a combination of high strength and stress corrosion cracking(SCC)resistance in such materials.

引用

页码：40 / 45

页数：6

共 9 条

[1]

Effect of Artificial Aging Temper on the Microstructure and Properties of 7B04 Pre-Stretched Thick Plate[J] . Zhu Bao Hong,Zhang Yong An,Xiong Bai Qing,Li Zhi Hui,Wang Feng,Liu Hong Wei.Materials Science Forum . 2006 (519)

[2]

Correlation of Strength with Hardness and Electrical Conductivity for Aluminium Alloy 7010[J] . Salazar-Guapuriche Manuel A.,Zhao Y.Y.,Pitman Adam,Greene Andrew.Materials Science Forum . 2006 (519)

[3]

Structure analysis of embedded nano-sized particles by precession electron diffraction. η ′-precipitate in an Al–Zn–Mg alloy as example[J] . Ultramicroscopy . 2006 (6)

[4]

Advanced High-Strength Aluminum-Base Materials[J] . I. N. Fridlyander,A. V. Dobromyslov,E. A. Tkachenko,O. G. Senatorova.Metal Science and Heat Treatment . 2005 (7)

[5]

Early-stage precipitation in Al–Zn–Mg–Cu alloy （7050）[J] . Gang Sha,Alfred Cerezo.Acta Materialia . 2004 (15)

[6]

Influence of zirconium and copper on the early stages of aging in Al-Zn-Mg alloys[J] . X. J. Jiang,B. Noble,V. Hansen,J. Tafto.Metallurgical and Materials Transactions A . 2001 (5)

[7]

Effect of microstructure on stress corrosion cracking of an Al-Zn-Mg-Cu alloy[J] . M. Puiggali,A. Zielinski,J.M. Olive,E. Renauld,D. Desjardins,M. Cid.Corrosion Science . 1998 (4)

[8] A TEM STUDY OF MICROSTRUCTURAL CHANGES DURING RETROGRESSION AND REAGING IN 7075 ALUMINUM [J].

DANH, NC ;

RAJAN, K ;

WALLACE, W .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1983, 14 (09) :1843-1850

[9]

A differential scanning calorimetry investigation of the effects of zinc and copper on solid state reactions in Al-Zn-Mg-Cu alloys. GARCIA-CORDOVILLA C,LOUIS E. Materials Science and Engineering . 1991

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