Structure and mechanical properties of aging Al-Li-Cu-Zr-Sc-Ag alloy after severe plastic deformation by high-pressure torsion

被引：12

作者：

Kaigorodova, L. I. ^{[1
]}

Rasposienko, D. Yu. ^{[1
]}

Pushin, V. G. ^{[1
]}

Pilyugin, V. P. ^{[1
]}

Smirnov, S. V. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[2] Russian Acad Sci, Inst Machine Sci, Ural Branch, Ekaterinburg 620049, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2015年 / 116卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

severe plastic deformation; high-pressure torsion; aging; recrystallization; supersaturated solid solution decomposition; nanocrystalline structure; boundaries; phase; grain dislocations; vacancies; microhardness; STABILITY; BEHAVIOR; PHASE;

D O I：

10.1134/S0031918X15040080

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The structural and phase transformations have been studied in aging commercial aluminum-lithium alloy Al-1.2 Li-3.2 Cu-0.09 Zr-0.11 Sc-0.4 Ag-0.3 Mg in the as-delivered state and after severe plastic deformation by torsion for 1, 5 and 10 revolutions under a high pressure of 4 GPa. Deformation-induced nanofragmentation and dynamic recrystallization have been found to occur in the alloy. The degree of recrystallization increases with deformation. Nanofragmentation and recrystallization processes are accompanied by the deformation-induced decomposition of solid solution and changes in both the nucleation mechanism of precipitation and the phase composition of the alloy. The influence of a nanostructured nanophase state of the alloy on its mechanical properties (microhardness, plasticity, elastic modulus, and stiffness) is discussed.

引用

页码：346 / 355

页数：10

共 14 条

[1] SIZE EFFECTS IN MICROMECHANICS OF NANOCRYSTALS [J].

GRYAZNOV, VG ;

TRUSOV, LI .

PROGRESS IN MATERIALS SCIENCE, 1993, 37 (04) :289-401

[2] STRUCTURE AND DEFORMATION-BEHAVIOR OF T1 PRECIPITATE PLATES IN AN AL-2LI-1CU ALLOY [J].

HOWE, JM ;

LEE, J ;

VASUDEVAN, AK .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1988, 19 (12) :2911-2920

[3]

HUANG JC, 1987, MATER SCI TECH SER, V3, P176, DOI 10.1179/026708387790122918

[4] Effect of storage on the stability of the grained structure and phase transformations in the nanocrystalline alloy 1450 doped with Sc and Mg [J].

Kaigorodova, L. I. ;

Rasposienko, D. Yu ;

Pilyugin, V. P. ;

Pushin, V. G. .

PHYSICS OF METALS AND METALLOGRAPHY, 2012, 113 (09) :867-877

[5] Effect of Severe Plastic Deformation on the Formation of the Nanocrystalline Structure and the Aging of the Multicomponent Aluminum-Lithium Alloy with Small Additions of Sc and Mg [J].

Kaigorodova, L. I. ;

Pushin, V. G. ;

Rasposienko, D. Yu. ;

Pilyugin, V. P. .

PHYSICS OF METALS AND METALLOGRAPHY, 2011, 111 (01) :72-79

[6]

Kaigorodova L. I., 2013, DEFORM RAZRUSH, P21

[7]

KAYGORODOVA LI, 1989, FIZ MET METALLOVED+, V67, P786

[8]

LAVERNIA EJ, 1990, J MATER SCI, V25, P1137

[9] Plasticity characteristic obtained by indentation [J].

Milman, Yu V. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2008, 41 (07)

[10] Nucleation of Ω phase in an Al-Cu-Mg-Mn-Ag alloy aged at temperatures below 200°C [J].

Mukhopadhyay, AK ;

Eggeler, G ;

Skrotzki, B .

SCRIPTA MATERIALIA, 2001, 44 (04) :545-551

← 1 2 →