Influence of high-pressure torsion on microstructural evolution in an Al-Zn-Mg-Cu alloy

被引：44

作者：

Duan, Zhi Chao ^{[1
,2
]}

Liao, Xiao Zhou ^{[3
]}

Kawasaki, Megumi ^{[1
,2
]}

Figueiredo, Roberto B. ^{[4
]}

Langdon, Terence G. ^{[1
,2
,4
]}

机构：

[1] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

[2] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

[3] Univ Sydney, Sch Aerosp Mech & Mech Engn, Sydney, NSW 2006, Australia

[4] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England

来源：

JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 17期

基金：

美国国家科学基金会;

关键词：

SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; PURITY ALUMINUM; PURE ALUMINUM; STRAIN; HOMOGENEITY; METALS; ECAP;

D O I：

10.1007/s10853-010-4400-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A commercial age-hardenable Al-7136 alloy was successfully processed by high-pressure torsion (HPT) at room temperature through 1/8 to 4 turns. Microhardness measurements showed significant hardening even after 1/8 turn with the average hardness value reaching a maximum after 1 turn and then slowly decreasing. Higher hardness values were attained by processing the alloy through one pass of equal-channel angular pressing in a supersaturated condition at room temperature and then applying HPT for 1 or 2 turns. Microstructural observations revealed the possibility of achieving true nanometer grain sizes of < 100 nm after processing at room temperature. There were variations in hardness with imposed strain due to the fragmentation and subsequent growth of precipitates during processing.

引用

页码：4621 / 4630

页数：10

共 44 条

[21] Advanced mechanical properties of pure titanium with ultrafine grained structure [J].

Sergueeva, AV ;

Stolyarov, VV ;

Valiev, RZ ;

Mukherjee, AK .

SCRIPTA MATERIALIA, 2001, 45 (07) :747-752

[22] Influence of equal-channel angular pressing on precipitation in an Al-Zn-Mg-Cu alloy [J].

Sha, G. ;

Wang, Y. B. ;

Liao, X. Z. ;

Duan, Z. C. ;

Ringer, S. P. ;

Langdon, T. G. .

ACTA MATERIALIA, 2009, 57 (10) :3123-3132

[23] An atom probe characterisation of grain boundaries in an aluminium alloy processed by equal-channel angular pressing [J].

Sha, Gang ;

Ringer, Simon P. ;

Duan, Zhi Chao ;

Langdon, Terence G. .

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2009, 100 (12) :1674-1678

[24] Vacancy concentrations determined from the diffuse background scattering of X-rays in plastically deformed copper [J].

Ungár, T ;

Schafler, E ;

Hanák, P ;

Bernstorff, S ;

Zehetbauer, M .

ZEITSCHRIFT FUR METALLKUNDE, 2005, 96 (06) :578-583

[25] Principles of equal-channel angular pressing as a processing tool for grain refinement [J].

Valiev, Ruslan Z. ;

Langdon, Terence G. .

PROGRESS IN MATERIALS SCIENCE, 2006, 51 (07) :881-981

[26] The effect of annealing on tensile deformation behavior of nanostructured SPD titanium [J].

Valiev, RZ ;

Sergueeva, AV ;

Mukherjee, AK .

SCRIPTA MATERIALIA, 2003, 49 (07) :669-674

[27] Bulk nanostructured materials from severe plastic deformation [J].

Valiev, RZ ;

Islamgaliev, RK ;

Alexandrov, IV .

PROGRESS IN MATERIALS SCIENCE, 2000, 45 (02) :103-189

[28] On the homogeneity of deformation by high pressure torsion [J].

Vorhauer, A ;

Pippan, R .

SCRIPTA MATERIALIA, 2004, 51 (09) :921-925

[29] Microstructure and mechanical properties of super-strong nanocrystalline tungsten processed by high-pressure torsion [J].

Wei, Q. ;

Zhang, H. T. ;

Schuster, B. E. ;

Ramesh, K. T. ;

Valiev, R. Z. ;

Kecskes, L. J. ;

Dowding, R. J. ;

Magness, L. ;

Cho, K. .

ACTA MATERIALIA, 2006, 54 (15) :4079-4089

[30] Using ECAP to achieve grain refinement, precipitate fragmentation and high strain rate superplasticity in a spraycast aluminum alloy [J].

Xu, C ;

Furukawa, M ;

Horita, Z ;

Langdon, TG .

ACTA MATERIALIA, 2003, 51 (20) :6139-6149

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