Critical sizes for coherent to semicoherent transition in precipitates
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Arun Kumar
Abstract
A coherent precipitate, on growth beyond a critical size, can become semicoherent through the formation of interfacial misfit dislocations. This investigation pertains to the finite element simulation of the state of stress of a coherent precipitate, its growth and the change in state of stress on the formation of an interfacial misfit dislocation loop. Critical radii are determined from the simulations based on: (i) global energy minimum (r*) and (ii) local force balance along the radial direction (rc). The concept of local force balance as existing in literature is extended to the circumferential direction, to calculate a new critical size (rt). Local force balance gives radii at which the interface is the stable position for the dislocation loop. Off-interface stability of the dislocation loops is also investigated. The Cu–γFe system is used as an example to illustrate the new methodology developed and validate the results of the simulation. The power of the methodology is shown by considering a configuration (precipitation in a thin disc), where standard theoretical formulations are inadequate.
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© 2013, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Critical sizes for coherent to semicoherent transition in precipitates
- Thixoformability evaluation of AA2011 and AA2014 alloys
- Joint strength of friction stir welded AISI 304 austenitic stainless steels
- Optimization of process parameters in explosive cladding of titanium/stainless steel 304L plates
- Optimization of the hot rolling parameters for evaluation of the formability of Nb-microalloyed steel sheet by using the Taguchi method
- XPS measurements of LDX 2101 duplex steel surface after magnetoelectropolishing
- Phase equilibria of the Al-Cr-Pr ternary system at 773 K
- Processing and mechanical characterisation of monolithic silicon carbide ceramic consolidated by spark plasma sintering (SPS)
- Effect of Mn doping on the microstructure and dielectric properties of BaHf0.1Ti0.9O3 ceramics
- Nano hydroxyapatite–polysulfone coating on Ti-6Al-4V substrate by electrospinning
- Photocatalytic and self-cleaning properties of SiO2/TiO2/SiO2 nanostructured thin film
- Formation mechanism of manganese vanadate microtubes and their electrochemical sensing properties
- Modification of the luminescent properties of ZnS nanoparticles by the adsorbed species
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Critical sizes for coherent to semicoherent transition in precipitates
- Thixoformability evaluation of AA2011 and AA2014 alloys
- Joint strength of friction stir welded AISI 304 austenitic stainless steels
- Optimization of process parameters in explosive cladding of titanium/stainless steel 304L plates
- Optimization of the hot rolling parameters for evaluation of the formability of Nb-microalloyed steel sheet by using the Taguchi method
- XPS measurements of LDX 2101 duplex steel surface after magnetoelectropolishing
- Phase equilibria of the Al-Cr-Pr ternary system at 773 K
- Processing and mechanical characterisation of monolithic silicon carbide ceramic consolidated by spark plasma sintering (SPS)
- Effect of Mn doping on the microstructure and dielectric properties of BaHf0.1Ti0.9O3 ceramics
- Nano hydroxyapatite–polysulfone coating on Ti-6Al-4V substrate by electrospinning
- Photocatalytic and self-cleaning properties of SiO2/TiO2/SiO2 nanostructured thin film
- Formation mechanism of manganese vanadate microtubes and their electrochemical sensing properties
- Modification of the luminescent properties of ZnS nanoparticles by the adsorbed species
- DGM News
- DGM News
