| METALS AND METAL MATRIX COMPOSITES |
|
|
|
|
|
| A Statistical Analysis on Twin Nucleation and Growth Related to Microstructure of AZ31 Mg Alloy |
| CHEN Yuan1,2, LAN Yongting3, ZHANG Keshi1,CAI Ganwei2, HU Guijuan1
|
1 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004;
2 School of Mechanical Engineering, Guangxi University, Nanning 530004;
3 School of Vocational and Technical Education, Guangxi University of Science and Technology, Liuzhou 545006; |
|
|
|
|
Abstract The present work aimed to extract the relationships between twin nucleation and growth and material microstructure in magnesium, and conducted a statistical analysis on EBSD-obtained numerous crystallographic test data such as grain size, crystal orientation, grain boundary misorientation and twin number, twin thick generated by electron backscattering diffraction (EBSD) technique. The statistical analysis of microstructure at a strain of 4.9% indicates that the distribution characteristics of grain size, grain boundary misorientation follow basically a Weibull distribution, and that large grains, high Schmid factors and low-angle grain boundaries are conducive to twin nucleation, but twin growth shows relatively low sensitiveness towards the above microstructure. But not all twin variants with high twin Schmid factors can nucleate and grow. The analyses of twin nucleation and growth at varying true strains also indicate that the intensities of twin variants nucleation at different position are inconsistent in the same grain due to other factors, such as defects, and dislocation, etc., that deeply influence twin nucleation. And on the other side, the twin growth rate strongly depends simultaneously on the number of twin nucleation and the number of twin variants. This work will provide a test basis for the exploration of mathematical relations between microstructure and twin nucleation & growth for Mg alloys.
|
|
Published: 22 November 2018
|
|
|
|
|
1 Zhang J X, Yu Q, Jiang Y Y, et al. An experimental study of cyclic deformation of extruded AZ61A magnesium alloy[J]. International Journal of Plasticity,2011,27(5):768.
2 Yu Q, Zhang J X, Jiang Y Y, et al. An experimental study on cyclic deformation and fatigue of extruded ZK60 magnesium alloy[J]. International Journal of Fatigue,2012,36(1):47.
3 Guo X Q, Chapuis A, Wu P D, et al. Experimental and numerical investigation of anisotropic and twinning behavior in Mg alloy under uniaxial tension[J]. Materials and Design,2016,98:333.
4 Beyerlein I J, Tome′ C N. A dislocation-based constitutive law for pure Zr including temperature effects[J]. International Journal of Plasticity,2008,24(5):867.
5 Brown D W, Sisneros T A, Clausen B, et al. Development of inter-granular thermal residual stresses in beryllium during cooling from processing temperatures[J]. Acta Materialia,2009,57(4):972.
6 Capolungo L, Beyerlein I J, Tome′ C N. Slip-assisted twin growth in hexagonal close-packed metals[J]. Scripta Materrialia,2009,60(1):32.
7 Godet S, Jiang L, Luoc A A, et al. Use of Schmid factors to select extension twin variants in extruded magnesium alloy tubes[J]. Scripta Materialia,2006,55(11):1055.
8 Zhan M Y, Li C M, Shang J L. Investigation of the plastic deformation mechanism and twinning of magnesium alloys[J]. Materials Review A: Review Papers,2011,25(2):1(in Chinese).
詹美燕,李春明,尚俊玲.镁合金的塑性变形机制和孪生变形研究[J].材料导报:综述篇,2011,25(2):1.
9 Hazeli K, Askari H, Cuadra J, et al. Microstructure-sensitive investigation of magnesium alloy fatigue[J]. International Journal of Plasticity,2015,68:55.
10 Vaidya S, Mahajan S. Accommodation and formation of {1121} twins in Co single crystals[J]. Acta Metallurgica,1980,28(8):1123.
11 Beyerlein I J, Capolungo L, Marshall P E, et al. Statistical analyses of deformation twinning in magnesium[J]. Philosophical Magazine,2010,90(16):2161.
12 Beyerlein I J, McCabe R J, Tome C N. Effect of microstructure on the nucleation of deformation twins in polycrystalline high-purity magnesium: A multi-scale modeling study[J]. Journal of the Mechanics and Physics of Solids,2011,59(5):988.
13 Juan P A, Pradalier C, Berbenni S, et al. A statistical analysis of the influence of microstructure and twin-twin junctions on twin nucleation and twin growth in Zr[J]. Acta Materialia,2015,95:399.
14 Serra A, Bacon D J, Pond R C. The crystallography and core structure of twinning dislocations in hcp metals[J]. Acta Metallurgica,1988,36 (12):3183.
15 Christian J W, Mahajan S. Deformation twinning[J]. Progress in Materials Science,1995,39(1):1.
16 Wang J, Beyerlein I J, Tome′ C N. An atomic and probabilistic perspective on twin nucleation in Mg[J]. Scripta Materialia,2010,63(7):741.
17 Wang J, Beyerlein I J, Hirth J P, et al. Twinning dislocations on {1011} and {1013} planes in hexagonal close-packed crystals[J]. Acta Materialia,2011,59(10):3990.
18 Lv X Z, Zhang J X, Harada H. Twin-dislocation and twin-twin interactions during cyclic deformation of a nickel-base single crystal TMS-82 superalloy[J]. International Journal of Fatigue,2014,66(18):246.
19 Capolungo L, Marshall P, McCabe R J, et al. Nucleation and growth of twins in Zr: A statistical study[J]. Acta Materialia,2009,57(20):6047.
20 Barnett M R. A rationale for the strong dependence of mechanical twinning on grain size[J]. Scripta Materialia,2008,59(7):696.
21 Jain A, Duygulu O, Brown D W, et al. Grain size effects on the tensile properties and deformation mechanisms of a magnesium alloy AZ31B sheet[J]. Materials Science and Engineering A,2008,486(1):545.
22 Fan H D, Aubry S, Arsenlis A, et al. Grain size effects on dislocation and twinning mediated plasticity in magnesium[J]. Scripta Materialia,2016,112:50.23 Capolungo L, Marshall P E, McCabe R J, et al. Nucleation and growth of twins in Zr: A statistical study[J]. Acta Materialia,2009,57(20):6047.
24 Beyerlein I J, Capolungo L, Marshall P E, et al. Statistical analyses of deformation twinning in magnesium[J]. Philosophical Magazine,2010,90(16):2161.
25 Xin Y C, Wang M Y, Zeng Z, et al. Strengthening and toughening of magnesium alloy by {1012} extension twins[J]. Scripta Materialia,2012; 66(1):25.
26 Wu L, Agnew S R, Ren Y, et al. The effects of texture and extension twinning on the low-cycle fatigue behavior of a rolled magne-sium alloy AZ31B[J]. Materials Science and Engineering,2010,527(26):7057.
27 Mokdad F, Chen D L, Li D Y. Single and double twin nucleation, growth, and interaction in an extruded magnesium alloy[J]. Mate-rials and Design,2017,119:376.
28 Mokdad F, Chen D L. Cyclic deformation and anelastic behavior of ZEK100 magnesium alloy: Effect of strain ratio[J]. Materials Science and Engineering A,2015,640:243.
29 Kwon H, Nakano H, Mabuchi M, et al. Twinning behaviour of AZ31 Mg alloy alternately compressed in two orthogonal directions[J]. Philosophical Magazine,2014,94(34):3960.
30 Kadiri H E, Kapil J, Oppedal A L, et al. The effect of twin-twin interactions on the nucleation and propagation of {1012} twinning in magnesium[J]. Acta Materialia,2013,61(10):3549. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2018, Vol. 32 
