Experimental study of asymmetrical tilt boundaries in WC-Co alloys
Source abstract
Abstract
Abstract The rotation angle distribution of grain boundaries with [2 -1 -1 0] misorientation axis in WC-Co alloys was investigated by electron backscatter diffraction for a range of cobalt contents. The effect of carbon content and sintering time was also studied. Preferred misorientations correspond to low-index boundary habit planes involving the basal or prismatic plane for at least one grain. The 26.2° [2 -1 -1 0] boundary was imaged by high resolution transmission electron microscopy. The joining of the mismatched planes at the boundary is accommodated by dislocations which are interpreted with reference to the 29.4° [2 -1 -1 0] boundary. The dislocation spacing and direction found experimentally are in agreement with calculated values obtained by the 02-lattice approach taking into account the misorientation and parametric misfit. The periodicity and characteristics of the dislocations indicate an optimization of the grain boundary structure and energy.
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Research context
OpenAlex topics: Advanced materials and composites · Microstructure and mechanical properties · Metallurgical Processes and Thermodynamics
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References (42)
Show source-provided references
1. A review of cemented carbides for rock drilling: an old but still tough challenge in geo-engineering10.1016/j.ijrmhm.2013.01.003 ↗
2. Trends in the P/M hard metal industry10.1016/j.ijrmhm.2014.07.007 ↗
3. The dependence of the contiguity of WC on Co content and its independence from WC grain size in WC-Co alloys10.1016/j.ijrmhm.2005.04.012 ↗
4. Effect of binder composition on WC grain growth in cemented carbides10.1111/jace.13748 ↗
5. Aspects of the metrology of contiguity measurements in WC based hard materials10.1016/j.ijrmhm.2016.05.011 ↗
6. Geometric and crystallographic characterization of WC surfaces and grain boundaries in WC-Co composites10.1023/B:INTS.0000012291.81411.dc ↗
7. Interface character distributions in WC-Co composites10.1111/j.1551-2916.2007.02226.x ↗
8. Pellan · 2015
9. EBSD study to analyse mechanisms of phase boundary and grain boundary development in WC-Co cemented carbides10.1080/00325899.2017.1290369 ↗
10. Grain boundary analysis in TEM. IV. Coincidence and the associated defect structure in tungsten carbide10.1002/pssa.2210620110 ↗
11. A new insight into the Σ=2 grain boundary characteristics in WC powder and in WC-Co sintered materials10.1016/j.actamat.2018.06.022 ↗
12. Co-phase penetration of WC(1 0 -1 0)/WC(1 0 -1 0) grain boundaries from first principles10.1103/PhysRevB.67.115415 ↗
13. Effects of cobalt intergranular segregation on interface energetics in WC-Co10.1016/j.actamat.2004.01.013 ↗
14. A computational study of interfaces in WC–Co cemented carbides10.1088/0965-0393/23/4/045001 ↗
15. Nature of the boundary planes in tungsten carbide-cobalt composites
16. Akesson · 1982
17. Evolution of the WC grain shape in WC-Co alloys during sintering: cumulated effect of the Cr addition and of the C content10.1016/j.ijrmhm.2008.07.010 ↗
18. Review Grain and subgrain characterisation by electron backscatter diffraction10.1023/A:1017973432592 ↗
19. Misorientation-angle distribution of randomly oriented symmetric objects10.1107/S0021889894011088 ↗
20. Atomic structures of symmetrical and asymmetrical facets in a near Σ=9{221} tilt grain boundary in copper10.1016/j.actamat.2006.10.041 ↗
21. Structure transition in a ZnO grain boundary10.1080/095008398178507 ↗
22. On the structure of tilt grain boundaries in cubic metals I. Symmetrical tilt boundaries10.1098/rsta.1983.0020 ↗
23. On the structure of tilt grain boundaries in cubic metals II. Asymmetrical tilt boundaries10.1098/rsta.1983.0021 ↗
24. On the structure of tilt grain boundaries in cubic metals. III. Generalizations of the structural study and implications for the properties of grain boundaries10.1098/rsta.1983.0022 ↗
25. Accommodation of coherency strain by interfacial disconnections at a 90°<110> grain boundary in gold10.1080/0950083031000091461 ↗
26. A study of the accommodation of coherency strain by interfacial defects at a grain boundary in gold10.1080/14786430600698864 ↗
27. Bollmann · 1982
28. Priester · 2011
29. Defects at surfaces and interfaces10.1016/S0081-1947(08)60641-4 ↗
30. HRPACK: a software describing the elastic fields near dislocations and interfaces at atomic scale10.1016/S0304-3991(97)00048-X ↗
31. Periodic displacement and stress fields near a phase boundary in the isotropic elasticity theory10.1080/01418618108236150 ↗
32. Hirth · 1968
33. Bollmann · 1970
34. The effects on grain-boundary processes of the steps in the boundary plane associated with the cores of grain-boundary dislocations10.1107/S0567739480000782 ↗
35. Steps, dislocations and disconnections as interface defects relating to structure and phase transformations10.1016/S1359-6454(96)00132-2 ↗
36. Dislocations, steps and disconnections at interfaces10.1016/0022-3697(94)90118-X ↗
37. On the absorption of dislocations by grain boundaries10.1080/14786437708244939 ↗
38. Periodic displacement and stress fields near a phase boundary in the isotropic elasticity theory10.1080/01418618108236150 ↗
39. Grain boundary faceting of <1 0 -1 0> tilt boundaries in zinc10.1016/0001-6160(71)90159-3 ↗
40. Σ = 99 and Σ = 41 Grain boundaries10.1016/0001-6160(88)90121-6 ↗
41. Strength and reinforcement of interfaces in cemented carbides10.1016/j.ijrmhm.2005.05.010 ↗
42. Characteristics and origin of clusters in submicron WC-Co cermets10.1080/1478643031000136094 ↗