Microstructure and mechanical properties after annealing of equal-channel angular pressed interstitial-free steel

被引：78

作者：

Hazra, Sujoy S. ^{[1
]}

Pereloma, Elena V. ^{[1
]}

Gazder, Azdiar A. ^{[1
]}

机构：

[1] Univ Wollongong, Sch Mech Mat & Mech Engn, Wollongong, NSW 2522, Australia

来源：

ACTA MATERIALIA | 2011年 / 59卷 / 10期

关键词：

Equal-channel angular pressing (ECAP); Equal-channel angular extrusion (ECAE); Electron back-scattering diffraction (EBSD); Recrystallization; Steels; ULTRAFINE-GRAINED ALUMINUM; SEVERE PLASTIC-DEFORMATION; SHEAR PUNCH TESTS; CONTINUOUS RECRYSTALLIZATION; TENSILE DEFORMATION; THERMAL-STABILITY; TEXTURE EVOLUTION; PROCESSING ROUTE; PURE ALUMINUM; IF STEEL;

D O I：

10.1016/j.actamat.2011.03.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of microstructure, microtexture and mechanical properties during isothermal annealing of an ultrafine-grained interstitial-free steel after eight passes of route B(C) room temperature equal-channel angular pressing (ECAP) was studied. The microstructure and microtexture were characterized by electron back-scattering diffraction, and mechanical properties were assessed by shear punch and uniaxial tensile testing. Homogeneous coarsening via continuous recrystallization of the ECAP microstructure is accompanied by minor changes in the similar to 63% high-angle boundary population and a sharpening of the original ECAP texture. This is followed by abnormal growth during the final stages of softening due to local growth advantages. Linear correlations between shear and tensile data were established for yield, ultimate strength and total elongation. After yield, the changes in uniaxial tensile behaviour from geometrical softening after ECAP to load drop, Luders banding and continuous yielding after annealing is attributable to a coarsening of the microstructure. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4015 / 4029

页数：15

共 52 条

[1] Evaluating high-temperature mechanical behavior of cast Mg-4Zn-xSb magnesium alloys by shear punch testing [J].

Alizadeh, R. ;

Mahmudi, R. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (16-17) :3975-3983

[2]

BECK PA, 1948, T AM I MIN MET ENG, V175, P372

[3] Continuous recrystallization in austenitic stainless steel after large strain deformation [J].

Belyakov, A ;

Sakai, T ;

Miura, H ;

Kaibyshev, R ;

Tsuzaki, K .

ACTA MATERIALIA, 2002, 50 (06) :1547-1557

[4] Critical grain size for dislocation storage and consequences for strain hardening of nanocrystalline materials [J].

Bouaziz, O. ;

Estrin, Y. ;

Brechet, Y. ;

Embury, J. D. .

SCRIPTA MATERIALIA, 2010, 63 (05) :477-479

[5] RECRYSTALLIZATION AND GRAIN GROWTH [J].

BURKE, JE ;

TURNBULL, D .

PROGRESS IN METAL PHYSICS, 1952, 3 :220-292

[6] Annealing Behavior of Nanostructured Aluminum Produced by Cold Rolling to Ultrahigh Strains [J].

Cao, W. Q. ;

Godfrey, A. ;

Hansen, N. ;

Liu, Q. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (01) :204-214

[7] EBSP study of the annealing behavior of aluminum deformed by equal channel angular processing [J].

Cao, WQ ;

Godfrey, A ;

Liu, W ;

Liu, Q .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 360 (1-2) :420-425

[8] Strength and tension/compression asymmetry in nanostructured and ultrafine-grain metals [J].

Cheng, S ;

Spencer, JA ;

Milligan, WW .

ACTA MATERIALIA, 2003, 51 (15) :4505-4518

[9] Precipitation and recrystallization behavior in extra low carbon steels [J].

Choi, JY ;

Seong, BS ;

Baik, SC ;

Lee, HC .

ISIJ INTERNATIONAL, 2002, 42 (08) :889-893

[10] Structural evolution of IF steel during annealing after ECAP [J].

De Messemaeker, J ;

Verlinden, B ;

Van Humbeeck, J .

RECRYSTALLIZATION AND GRAIN GROWTH, PTS 1 AND 2, 2004, 467-470 :1295-1300

← 1 2 3 4 5 6 →