Deformation twinning in cp-Ti and its effect on fatigue cracking

被引：44
作者：
Bosh, N. [1 ,2 ]
Mueller, C. [1 ]
Mozaffari-Jovein, H. [2 ]
机构：
[1] Univ Freiburg, Dept Microsyst Engn IMTEK, Freiburg, Germany
[2] Hsch Campus Tuttlingen, IWAT, Tuttlingen, Germany
来源：
MATERIALS CHARACTERIZATION | 2019年 / 155卷
关键词：
cp-Ti; Hcp metal; Twinning deformation; Fatigue cracking; EBSD analysis; MECHANISMS; TEXTURE; MICROSTRUCTURE; PLASTICITY; EVOLUTION; TITANIUM;
D O I：
10.1016/j.matchar.2019.109810
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fatigue strength of polycrystalline cp-Ti depends on a variety of different factors especially its plastic deformation mechanism. Deformation twinning is activated as a major deformation mechanism in cp-Ti during cyclic deformation. The fatigue-induced twin transformation developing on the surface of the cp-Ti specimens is accompanied with the microstructure irregularities, which affect the cohesive properties of grain boundaries and thus its fatigue cracking. The twinned grains serve as preferential sites for the localized shear and act as preferred path for crack propagation. The texture evolution was observed during cyclic deformation in cp-Ti which can be explained by the high twinning activity. The residual stress relaxation takes place significantly by imposing a mechanical loading.
引用
收藏
页数：11
相关论文
共 24 条
[1]  
[Anonymous], 1983, THEORY DISLOCATIONS
[2]   Evolution of stress in individual grains and twins in a magnesium alloy aggregate [J].
Aydiner, C. C. ;
Bernier, J. V. ;
Clausen, B. ;
Lienert, U. ;
Tome, C. N. ;
Brown, D. W. .
PHYSICAL REVIEW B, 2009, 80 (02)
[3]   On the mechanistic basis of deformation at the microscale in hexagonal close-packed metals [J].
Britton, T. B. ;
Dunne, F. P. E. ;
Wilkinson, A. J. .
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2015, 471 (2178)
[4]   Crystal plasticity from dislocation dynamics [J].
Bulatov, V. V. .
MATERIALS ISSUES FOR GENERATION IV SYSTEMS: STATUS, OPEN QUESTIONS AND CHALLENGES, 2008, :275-284
[5]   The high-strain-rate response of alpha-titanium: Experiments, deformation mechanisms and modeling [J].
Chichili, DR ;
Ramesh, KT ;
Hemker, KJ .
ACTA MATERIALIA, 1998, 46 (03) :1025-1043
[6]   Fatigue deformation mechanism of the annealed zircaloy-4 with texture [J].
Choi, HI ;
Lee, DH ;
Kwun, SI .
SCRIPTA MATERIALIA, 1998, 38 (04) :565-571
[7]   Effect of deformation twinning on microstructure and texture evolution during cold rolling of CP-titanium [J].
Chun, YB ;
Yu, SH ;
Semiatin, SL ;
Hwang, SK .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 398 (1-2) :209-219
[8]   Importance of twinning in static and dynamic compression of a Ti-6Al-4V titanium alloy with an equiaxed microstructure [J].
Coghe, F. ;
Tirry, W. ;
Rabet, L. ;
Schryvers, D. ;
Van Houtte, P. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 537 :1-10
[9]   Interface structures and twinning mechanisms of {(1)over-bar012} twins in hexagonal metals [J].
Gong, Mingyu ;
Hirth, John P. ;
Liu, Yue ;
Shen, Yao ;
Wang, Jian .
MATERIALS RESEARCH LETTERS, 2017, 5 (07) :449-464
[10]  
Graff S., 2007, THESIS
123