Flow behavior and microstructure evolution of 7055 aluminum alloy impacted at high strain rates

被引：49

作者：

Liu, Shengdan ^{[1
,2
]}

Wang, Shaoling ^{[1
,2
]}

Ye, Lingying ^{[1
,2
]}

Deng, Yunlai ^{[1
,2
]}

Zhang, Xinming ^{[1
,2
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 677卷

关键词：

7055 aluminum alloy; High strain rate; Microstructure; MG-CU ALLOY; PRECIPITATION; DEFORMATION; LOCALIZATION; TEMPERATURE; DIFFUSION; CORROSION; AA7055;

D O I：

10.1016/j.msea.2016.09.047

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The flow behavior and microstructure evolution of 7055 aluminum alloy impacted at the strain rates from 1000 s(-1) to 6000 s(-1) were investigated by a compressive split-Hopkinson pressure bar, optical microscopy, transmission electron microscopy and scanning transmission electron microscopy. The maximum stress tends to increase first with the increase of strain rate from 1000 s(-1) to 4000 s(-1), and then decrease at higher strain rate. The strain rate sensitivity is positive in the strain rate range of 1000-4000 s(-1), but became negative above 4000 s(-1) because of the presence of shear bands and shear band induced cracks due to intensive strain localization. Impact deformation prompts transformation of eta' phase into eta(2) phase, and changes the morphology of precipitates from a platelet-like shape to a globe like shape. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：203 / 210

页数：8

共 26 条

[1]

[Anonymous], 2014, THESIS

[2] Investigation of precipitation behavior and related hardening in AA 7055 aluminum alloy [J].

Chen, Junzhou ;

Zhen, Liang ;

Yang, Shoujie ;

Shao, Wenzhu ;

Dai, Shenglong .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 500 (1-2) :34-42

[3] Three-Stage Homogenization of Al-Zn-Mg-Cu Alloys Containing Trace Zr [J].

Deng, Yun-Lai ;

Zhang, Yun-Ya ;

Wan, Li ;

Zhu, Alf A. ;

Zhang, Xin-Ming .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2013, 44A (06) :2470-2477

[4] In situ evaluation of dynamic precipitation during plastic straining of an Al-Zn-Mg-Cu alloy [J].

Deschamps, A. ;

Fribourg, G. ;

Brechet, Y. ;

Chemin, J. L. ;

Hutchinson, C. R. .

ACTA MATERIALIA, 2012, 60 (05) :1905-1916

[5] The effect of pre-ageing temperature and retrogression heating rate on the microstructure and properties of AA7055 [J].

Feng, D. ;

Zhang, X. M. ;

Liu, S. D. ;

Wang, T. ;

Wu, Z. Z. ;

Guo, Y. W. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 588 :34-42

[6] AN ELECTRON MICROSCOPE INVESTIGATION OF MICROSTRUCTURE IN AN ALUMINUM-ZINC-MAGNESIUM ALLOY [J].

GJONNES, J ;

SIMENSEN, CJ .

ACTA METALLURGICA, 1970, 18 (08) :881-&

[7] ON THE ROLE OF DISLOCATIONS IN BULK DIFFUSION [J].

HART, EW .

ACTA METALLURGICA, 1957, 5 (10) :597-597

[8] Severe plastic deformation-induced dissolution of θ" particles in Al-Cu binary alloy and subsequent nature aging behavior [J].

Huang, Wenjie ;

Liu, Zhiyi ;

Xia, Linyan ;

Xia, Peng ;

Zeng, Sumin .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 556 :801-806

[9] Determination of temperature rise during high strain rate deformation [J].

Kapoor, R ;

Nemat-Nasser, S .

MECHANICS OF MATERIALS, 1998, 27 (01) :1-12

[10] HREM study and structure modeling of the η′ phase, the hardening precipitates in commercial Al-Zn-Mg alloys [J].

Li, XZ ;

Hansen, V ;

Gjonnes, J ;

Wallenberg, LR .

ACTA MATERIALIA, 1999, 47 (09) :2651-2659

← 1 2 3 →