Ageing precipitation and strengthening behavior of the spray formed Al-Zn-Mg-Cu alloy

被引：0

作者：

Liu Hongwei ^{[1
]}

Wang Feng ^{[1
]}

Xiong Baiqing ^{[1
]}

Zhang Yong'an ^{[1
]}

Li Zhihui ^{[1
]}

Li Xiwu ^{[1
]}

机构：

[1] Gen Res Inst Nonferrous Met, State Key Lab Nonferrous Met & Proc, Beijing 100088, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS II, PTS 1-3 | 2012年 / 535-537卷

关键词：

Al-Zn-Mg-Cu alloy; spray deposited; ageing treatment; microstructure; MICROSTRUCTURE; ZIRCONIUM;

D O I：

10.4028/www.scientific.net/AMR.535-537.903

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the Al-Zn-Mg-Cu alloy was prepared by spray forming process. The ageing precipitation and strengthening behavior of the spray formed Al-Zn-Mg-Cu alloy were studied by microhardness tests, differential scanning calorimetry (DSC) and transmission electron microscopy (TEM).The results show that the main strengthening precipitates of the spray formed Al-Zn-Mg-Cu alloy are GPI (solute-rich clusters), GPII (vacancy-rich clusters) under peak aging condition. The effect of the microstructure on ageing hardness is controlled by the size and amount of the existing precipitates, and therefore depends critically on the ageing temperature and ageing time. Strength of this alloy is influenced significantly during natural ageing at room temperature, which is related to the dominant formation of GPI. During the initial stage of artificial ageing at 120 degrees C, strong age-strengthening response is due to the formation of GP zones (both GPI and GPII).During later stages of artificial ageing, GPII precipitation is accelerated significantly but GPI is not affected clearly.

引用

页码：903 / 908

页数：6

共 12 条

[1]

Clinch M.R., 2004, Materials forum, V28, P145

[2] STRUCTURE AND PROPERTIES OF RAPIDLY SOLIDIFIED ULTRAHIGH STRENGTH AL-ZN-MG-CU ALLOYS PRODUCED BY SPRAY DEPOSITION [J].

DESANCTIS, M .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 141 (01) :103-121

[3] Influence of predeformation on ageing in an Al-Zn-Mg alloy -: I.: Microstructure evolution and mechanical properties [J].

Deschamps, A ;

Livet, F ;

Bréchet, Y .

ACTA MATERIALIA, 1998, 47 (01) :281-292

[4] Investigation of fine scale precipitates in Al-Zn-Mg alloys after various heat treatments [J].

Engdahl, T ;

Hansen, V ;

Warren, PJ ;

Stiller, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 327 (01) :59-64

[5] Influence of zirconium and copper on the early stages of aging in Al-Zn-Mg allays [J].

Jiang, XJ ;

Noble, B ;

Hansen, V ;

Tafto, J .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (05) :1063-1073

[6]

LENGSFELD P, 1995, INT J RAPID SOLIDIF, V8, P237

[7] THE INFLUENCE OF ZIRCONIUM ON THE EARLY STAGES OF AGING OF A TERNARY AL-ZN-MG ALLOY [J].

MUKHOPADHYAY, AK ;

YANG, QB ;

SINGH, SR .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (09) :3083-3091

[8] Early-stage precipitation in Al-Zn-Mg-Cu alloy (7050) [J].

Sha, G ;

Cerezo, A .

ACTA MATERIALIA, 2004, 52 (15) :4503-4516

[9] Aging response of Al-Zn-Mg-Cu spray formed alloys and their metal matrix composites [J].

Sharma, M. M. ;

Amateau, M. F. ;

Eden, T. J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 424 (1-2) :87-96

[10] Mesoscopic structure control of spray formed high strength Al-Zn-Mg-Cu alloys [J].

Sharma, MM ;

Amateau, MF ;

Eden, TJ .

ACTA MATERIALIA, 2005, 53 (10) :2919-2924

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