Slip dislocation and twin nucleation mechanisms in hcp metals
Source abstract
Abstract
A new nucleation mechanism is proposed for {101¯1} deformation twin in hcp materials. The mechanism is based on the results of atomistic computer simulations. It was found that under high shear stress applied on {101¯1} plane (the stress level is about 7 % of shear modulus), the core of a slip dislocation can transform to a twin embryo. The transformation and subsequent twin growth are accompanied by nucleation and migration of interfacial defects including disconnections and stacking faults. The paper provides the analysis of the nature of these defects and describes the reactions between them.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · Aluminum Alloys Composites Properties · Aluminum Alloy Microstructure Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Christian JW, Mahajan S (1995) Deformation twinning. Prog Mater Sci 39:1–15710.1016/0079-6425(94)00007-7 ↗
2. Komninou P, Kehagias T, Karakostas T, Antonopoulos JG, Braisaz T, Nouet G, Serra A (2000) Electron microscopy of defects in hexagonal materials. In: Lepinoux J et al (eds) Multiscale phenomena in plasticity. Kluwer, Boston, pp 215–226
3. Paton NE, Backofen WA (1970) Plastic deformation of titanium at elevated temperatures. Metall Trans 1:2839–284710.1007/BF03037822 ↗
4. Meng L, Yang P, Xie Q, Mao W (2008) Analyses on compression twins in magnesium. Mater Trans 49:710–71410.2320/matertrans.MRA2007242 ↗
5. Serra A, Pond RC, Bacon DJ (1991) Computer simulation of the structure and mobility of twinning dislocations in H.C.P. metals. Acta Metall Mater 39:1469–148010.1016/0956-7151(91)90232-P ↗
6. Kasukabe Y, Yamada Y, Peng JL, Bursill LA (1993) Structure analysis of twins $$ \{ 1\bar{1}01\} $$ { 1 1 ¯ 01 } in evaporated titanium thin films. Philos Mag A 68:587–59810.1080/01418619308213983 ↗
7. Kasukabe Y, Yamada Y, Peng JL, Bursill LA (1993) Characterization of twin $$ \{ 1\bar{1}01\} $$ { 1 1 ¯ 01 } dislocation structures in evaporated titanium thin films by high-resolution transmission electron microscopy. Philos Mag Lett 67:361–36810.1080/09500839308240944 ↗
8. Pond RC, Bacon DJ, Serra A (1995) Interfacial structure of twins $$ \{ 10\bar{1}1\} $$ { 10 1 ¯ 1 } and twinning dislocations in titanium. Philos Mag Lett 71:275–28410.1080/09500839508240521 ↗
9. Serra A, Bacon DJ, Pond RC (1988) The crystallography and core structure of twinning dislocations in hcp metals. Acta Metall 36:3183–320310.1016/0001-6160(88)90054-5 ↗
10. Bursill LA, Peng JL, Fan XD, Kasukabe Y, Yamada Y (1995) $$ \{ 10\bar{1}1\} $$ { 10 1 ¯ 1 } twin dislocation structures in evaporated titanium thin films. Philos Mag Lett 71:269–27310.1080/09500839508240520 ↗
11. Morris JR, Ye YY, Ho M, Chan CT, Yoo MH (1995) Structures and energies of compression twin boundaries in hcp Ti and Zr. Philos Mag A 72:751–75310.1080/01418619508243798 ↗
12. Wang YC, Ping DH, Li DX, Ye HQ (1996) A high-resolution transmission electron microscopy study of the $$ \{ 10\bar{1}1\} $$ { 10 1 ¯ 1 } twin-boundary structure in alpha-Ti. Philos Mag Lett 74:367-37310.1080/095008396180100 ↗
13. Braisaz T, Ruterana P, Nouet G, Komninou P, Kehaigas T, Karakostas T, Poulopoulos P, Aggelakeris M, Flevaris N, Serra A (1998) Nanocrystalline thin titanium films grown on potassium bromide single crystals. Thin Solid Films 19:140–14310.1016/S0040-6090(97)01109-7 ↗
14. Serra A, Bacon DJ (1995) Computer simulation of screw dislocation interactions with twin boundaries in H.C.P. metals. Acta metall mater 43:4465–448110.1016/0956-7151(95)00128-I ↗
15. Wang J, Beyerlein IJ, Hirth JP (2012) Nucleation of elementary $$ \{ 10\bar{1}1\} $$ { 10 1 ¯ 1 } and $$ \{ \bar{1}013\} $$ { 1 ¯ 013 } twinning dislocations at a twin boundary in hexagonal close-packed crystals. Model Sim Mater Sci Eng 20:02400110.1088/0965-0393/20/2/024001 ↗
16. Barrett CD, El Kadiri H (2014) Impact of deformation faceting on $$ \{ 10\bar{1}2\} $$ { 10 1 ¯ 2 } , $$ \{ 10\bar{1}1\} $$ { 10 1 ¯ 1 } and $$ \{ 10\bar{1}3\} $$ { 10 1 ¯ 3 } embryonic twin nucleation in hexagonal close-packed metals. Acta Mater 70:137-16110.1016/j.actamat.2014.02.018 ↗
17. Mendelson S (1969) Zonal dislocations and twin lamellae in h.c.p Metals. Mater Sci Eng 4:231–24210.1016/0025-5416(69)90067-6 ↗
18. Capolungo L, Beyerlein IJ (2008) Nucleation and stability of twins in hcp metals. Phys Rev B 78:02411710.1103/PhysRevB.78.024117 ↗
19. Sun DY, Mendelev MI, Becker CA, Kudin K, Haxhimali T, Asta M (2006) Crystal-melt interfacial free energies in hcp metals: a molecular dynamics study of Mg. Phys Rev B 73:02411610.1103/PhysRevB.73.024116 ↗
20. Plimpton S (1995) Fast parallel algorithms for short-range molecular dynamics. J Comp Phys 117:1–1910.1006/jcph.1995.1039 ↗
21. Stukowski A (2010) Visualization and analysis of atomistic simulation data with OVITO–the open visualization tool. Modell Simul Mater Sci Eng 18:01501210.1088/0965-0393/18/1/015012 ↗
22. Hirth JP, Lothe J (1968) Theory of dislocations. McGraw-Hill, New York
23. Vitek V (1992) Structure of dislocation cores in metallic materials and its impact on their plastic behavior. Progr Mater Sci 36:1–2710.1016/0079-6425(92)90003-P ↗
24. Yasi JA, Nogaret T, Trinkle DR, Qi Y, Hector LG Jr, Curtin WA (2009) Basal and prism dislocation cores in magnesium: comparison of first-principles and embedded-atom-potential methods predictions. Modell Simul Mater Sci Eng 17:05501210.1088/0965-0393/17/5/055012 ↗
25. Barrett CD, El Kadiri H (2014) Fundamentals of mobile tilt grain boundary faceting. Scripta Mater 84–85:15–1810.1016/j.scriptamat.2014.03.022 ↗
26. Pinsook U, Ackland GJ (1998) Simulation of martensitic microstructural evolution in zirconium. Phys Rev B 58:11252–1125710.1103/PhysRevB.58.11252 ↗
27. Pinsook U, Ackland GJ (2000) Atomistic simulation of shear in a martensitic twinned microstructure. Phys Rev B 62:5427–543410.1103/PhysRevB.62.5427 ↗
28. Ackland GJ (2005) Simulations of martensitic microstructure. J Mater Sci 40:3205–3208. doi: 10.1007/s10853-005-2685-110.1007/s10853-005-2685-1 ↗
29. Wang J, Beyerlein IJ, Hirth JP, Tome CN (2011) Twinning dislocations on $$ \{ 10\bar{1}1\} $$ { 10 1 ¯ 1 } and $$ \{ 10\bar{1}3\} $$ { 10 1 ¯ 3 } planes in hexagonal close-packed crystals. Acta Mater 59:3990–400110.1016/j.actamat.2011.03.024 ↗