Intergranular stress corrosion crack propagation in hot-rolled AZ31 Mg alloy sheet

被引：26

作者：

Casajus, Paula ^{[1
]}

Winzer, Nicholas ^{[1
]}

机构：

[1] Fraunhofer Inst Mech Mat IWM, D-79108 Freiburg, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 602卷

关键词：

EBSD; Magnesium alloys; Sheet forming; Hydrogen embrittlement; HIGH-TEMPERATURE DEFORMATION; AZ91 MAGNESIUM ALLOY; DYNAMIC RECRYSTALLIZATION; HYDROGEN DIFFUSION; GRAIN-SIZE; PLASTIC-DEFORMATION; TEXTURE EVOLUTION; BEHAVIOR; CAST; EMBRITTLEMENT;

D O I：

10.1016/j.msea.2014.02.077

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The susceptibility to stress corrosion cracking (SCC) of hot-rolled AZ31 Mg alloy sheets with different levels of deformation were evaluated by constant extension rate tensile (CERT) testing in distilled water. The normalised macroscopic SCC susceptibilities of the materials, characterised in terms of the normalised UTS and elongation-to-failure, were relatively consistent; however, the predominant mode of SCC propagation was strongly dependent on the microstructure. For all materials, cracks were initiated by localised film rupture and dissolution. Crack propagation through fine-grained, recrystallised regions was intergranular, whereas crack propagation through the larger, original grains was transgranular and tended to follow {10(1)over bar2} twin boundaries. In both cases, the crack propagation mechanism was a form of hydrogen embrittlement. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：58 / 67

页数：10

共 62 条

[1] Study of slip mechanisms in a magnesium alloy by neutron diffraction and modeling [J].

Agnew, SR ;

Tomé, CN ;

Brown, DW ;

Holden, TM ;

Vogel, SC .

SCRIPTA MATERIALIA, 2003, 48 (08) :1003-1008

[2] Influence of strain path change on the rolling behavior of twin roll cast magnesium alloy [J].

Al-Samman, T. ;

Gottstein, G. .

SCRIPTA MATERIALIA, 2008, 59 (07) :760-763

[3] Dynamic recrystallization during high temperature deformation of magnesium [J].

Al-Samman, T. ;

Gottstein, G. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 490 (1-2) :411-420

[4] Orientation dependent slip and twinning during compression and tension of strongly textured magnesium AZ31 alloy [J].

Al-Samman, T. ;

Li, X. ;

Chowdhury, S. Ghosh .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (15) :3450-3463

[5] HYDROGEN DIFFUSION AND PERMEATION IN MICROCRYSTALLINE AND NANOCRYSTALLINE NICKEL [J].

ARANTES, DR ;

HUANG, XY ;

MARTE, C ;

KIRCHHEIM, R .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (11) :3215-3222

[6]

Atrens A, 2011, STRESS CORROSION CRACKING: THEORY AND PRACTICE, P341

[7]

Atrens A, 2011, WOODHEAD PUBL MATER, P299

[8] Stress corrosion cracking and hydrogen diffusion in magnesium [J].

Atrens, Andrej ;

Winzer, Nicholas ;

Song, Guangling ;

Dietzel, Wolfgang ;

Blawert, Carsten .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (08) :749-751

[9] Influence of grain size on the compressive deformation of wrought Mg-3Al-1Zn [J].

Barnett, MR ;

Keshavarz, Z ;

Beer, AG ;

Atwell, D .

ACTA MATERIALIA, 2004, 52 (17) :5093-5103

[10] Grain-boundary engineering markedly reduces susceptibility to intergranular hydrogen embrittlement in metallic materials [J].

Bechtle, S. ;

Kumar, M. ;

Somerday, B. P. ;

Launey, M. E. ;

Ritchie, R. O. .

ACTA MATERIALIA, 2009, 57 (14) :4148-4157

← 1 2 3 4 5 6 7 →