Influence of Zn content on the microstructure and mechanical performance of ultrafine-grained Al-Zn alloys processed by high-pressure torsion

被引：27

作者：

Chinh, Nguyen Q. ^{[1
]}

Jenei, Peter ^{[1
]}

Gubicza, Jeno ^{[1
]}

Bobruk, Elena V. ^{[2
,3
]}

Valiev, Ruslan Z. ^{[2
,3
]}

Langdon, Terence G. ^{[4
,5
,6
]}

机构：

[1] Eotvos Lorand Univ, Dept Mat Phys, Pazmany Peter Satany 1-A, H-1117 Budapest, Hungary

[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, 12 K Marx Str, Ufa 450000, Russia

[3] St Petersburg State Univ, Lab Mech Bulk Nanostruct Mat, 28 Univ Sky Pr, St Petersburg 198504, Russia

[4] Univ Southern Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

[5] Univ Southern Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

[6] Univ Southampton, Fac Engn & Environm, Mat Res Grp, Southampton SO17 1BJ, Hants, England

来源：

MATERIALS LETTERS | 2017年 / 186卷

基金：

匈牙利科学研究基金会;

关键词：

Al-Zn alloys; Grain boundaries; Indentation; Micro-pillars; Strain rate sensitivity; Ultrafine grains; DEFORMATION; BEHAVIOR; PHASE;

D O I：

10.1016/j.matlet.2016.09.114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al-Zn alloys were processed by high-pressure torsion (HPT) to produce ultrafine-grained (UFG) materials. For low Zn contents, HPT gave strengthening due to grain refinement while for the highest Zn concentration the decomposition of the microstructure yielded an abnormal softening at room temperature. The microstructure decomposition led also to the formation of a Zn-rich phase which wet the Al/Al grain boundaries and enhanced the role of grain boundary sliding with unusually high strain rate sensitivity. The occurrence of intensive sliding in these UFG alloys is demonstrated by deforming micro-pillars.

引用

页码：334 / 337

页数：4

共 14 条

[1] Softening by severe plastic deformation and hardening by annealing of aluminum-zinc alloy: Significance of elemental and spinodal decompositions [J].

Alhamidi, Ali ;

Edalati, Kaveh ;

Horita, Zenji ;

Hirosawa, Shoichi ;

Matsuda, Kenji ;

Terada, Daisuke .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 610 :17-27

[2]

Bobruk EV, 2015, REV ADV MATER SCI, V43, P45

[3] A microstructure-based model for describing the material properties of Al-Zn alloys during high pressure torsion [J].

Borodachenkova, M. ;

Barlat, F. ;

Wen, W. ;

Bastos, A. ;

Gracio, J. J. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2015, 68 :150-163

[4] Mathematical description of indentation creep and its application for the determination of strain rate sensitivity [J].

Chinh, Nguyen Q. ;

Szommer, Peter .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 611 :333-336

[5] Grain Boundary Phenomena in an Ultrafine-Grained Al-Zn Alloy with Improved Mechanical Behavior for Micro-Devices [J].

Chinh, Nguyen Q. ;

Valiev, Ruslan Z. ;

Sauvage, Xavier ;

Varga, Gabor ;

Havancsak, Karoly ;

Kawasaki, Megumi ;

Straumal, Boris B. ;

Langdon, Terence G. .

ADVANCED ENGINEERING MATERIALS, 2014, 16 (08) :1000-1009

[6] Observations of unique plastic behavior in micro-pillars of an ultrafine-grained alloy [J].

Chinh, Nguyen Q. ;

Gyori, Tivadar ;

Valiev, Ruslan Z. ;

Szommer, Peter ;

Varga, Gabor ;

Havancsak, Karoly ;

Langdon, Terence G. .

MRS COMMUNICATIONS, 2012, 2 (03) :75-78

[7] Grain boundary wetting by a solid phase;: microstructural development in a Zn-5 wt% Al alloy [J].

López, GA ;

Mittemeijer, EJ ;

Straumal, BB .

ACTA MATERIALIA, 2004, 52 (15) :4537-4545

[8] Gradual softening of Al-Zn alloys during high-pressure torsion [J].

Mazilkin, A. A. ;

Straumal, B. B. ;

Borodachenkova, M. V. ;

Valiev, R. Z. ;

Kogtenkova, O. A. ;

Baretzky, B. .

MATERIALS LETTERS, 2012, 84 :63-65

[9] The deformation physics of nanocrystalline metals: Experiments, analysis, and computations [J].

Meyers, MA ;

Mishra, A ;

Benson, DJ .

JOM, 2006, 58 (04) :41-48

[10]

Mondolfo LF., 1979, STRUCTURE PROPERTIES

← 1 2 →