Effect of Grain Refinement on Jerky Flow in an Al-Mg-Sc Alloy

被引：79

作者：

Mogucheva, Anna ^{[1
]}

Yuzbekova, Diana ^{[1
]}

Kaibyshev, Rustam ^{[1
]}

Lebedkina, Tatiana ^{[2
]}

Lebyodkin, Mikhail ^{[2
]}

机构：

[1] Belgorod State Univ, Lab Mech Properties Nanostruct Mat & Superalloys, Pobeda 85, Belgorod 308015, Russia

[2] Univ Lorraine, CNRS UMR 7239, Lab Etude Microstruct & Mecan Mat LEM3, F-57045 Metz, France

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2016年 / 47A卷 / 05期

关键词：

STRAIN-RATE; TENSILE DEFORMATION; SURFACE-ROUGHNESS; SERRATED FLOW; PORTEVIN; BEHAVIOR; EVOLUTION; EMISSION; YIELD; BANDS;

D O I：

10.1007/s11661-016-3381-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of microstructure on the manifestations of the Portevin-Le Chatelier (PLC) effect was studied in an Al-Mg-Sc alloy with unrecrystallized, partially recrystallized, and fully recrystallized grain structures. It was found that the extensive grain refinement promotes plastic instability: the temperature-strain rate domain of the PLC effect becomes wider and the critical strain for the onset of serrations decreases. Besides, the amplitude of regular stress serrations observed at room temperature and an intermediate strain rate increases several times, indicating a strong increase of the contribution of solute solution hardening to the overall strength. Moreover, the grain refinement affects the usual sequence of the characteristic types of stress serrations, which characterize the dynamical mechanisms governing a highly heterogeneous unstable plastic flow. Finally, it reduces the strain localization and surface roughness and diminishes the difference between the surface markings detected in the necked area and in the region of uniform elongation. (C) The Minerals, Metals & Materials Society and ASM International 2016

引用

页码：2093 / 2106

页数：14

共 58 条

[41]

Polmear IJ., 2006, Light Metals: From Traditional Alloys to Nanocrystals, V4, P421

[42]

Portevin A., 1924, T AM SOC STEEL TREAT, V5, S., P457

[43]

Portevin A., 1923, CR HEBD ACAD SCI, P507

[44] CREEP-BEHAVIOR OF COPPER AT INTERMEDIATE TEMPERATURES .2. SURFACE MICROSTRUCTURAL OBSERVATIONS [J].

RAJ, SV ;

LANGDON, TG .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (08) :1817-1822

[45]

ROBINSON JM, 1994, INT MATER REV, V39, P113, DOI 10.1179/095066094790326149

[46] Scandium in aluminium alloys [J].

Royset, J ;

Ryum, N .

INTERNATIONAL MATERIALS REVIEWS, 2005, 50 (01) :19-44

[47] Investigation of Portevin-Le Chatelier Effect in Al-2.5 pct Mg Alloy with Different Microstructure [J].

Sarkar, Apu ;

Barat, P. ;

Mukherjee, P. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2013, 44A (06) :2604-2612

[48] On the nature of the yield point phenomenon [J].

Schwab, Rainer ;

Ruff, Volker .

ACTA MATERIALIA, 2013, 61 (05) :1798-1808

[49] Multiscale study of acoustic emission during smooth and jerky flow in an AlMg alloy [J].

Shashkov, I. V. ;

Lebyodkin, M. A. ;

Lebedkina, T. A. .

ACTA MATERIALIA, 2012, 60 (19) :6842-6850

[50] A Study of the Fundamental Relationships between Deformation-Induced Surface Roughness and Strain Localization in AA5754 [J].

Stoudt, M. R. ;

Hubbard, J. B. ;

Iadicola, M. A. ;

Banovic, S. W. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (07) :1611-1622

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