Objective
Three dimensional models of the plasticity of metal crystals have been developed. Microscopic and macroscopic properties were considered.
The models were compared to experimental investigations of recovery in aluminium alloys. The work proved the applicability of the simulation to a typical N-body problem; the cross slip was sufficient to simulate the logarithmic decrease in mechanical properties observed.
The models were used to investigate dynamic strain ageing associated with dynamic interaction of dislocations with mobile solutes. Good agreement with experiment was achieved. The mechanism of dislocation patterning and strain localization during plastic flow was also investigated. An instability which propagated at constant velocity was evident in the model.
To contribute data for comparison with the models, an electron microscopy study of slip band growth and fine structure in monocrystal and polycrystal copper-aluminium alloys was undertaken. The propagation of dislocations due to imposed stresses was observed.
The proposed research has two aims:(i) investigate the self-organization of dislocations in crystalline solids during plastic flow,(ii) establish a connection between this microstructural organization and mechanical properties at macroscopic scale. It is based on a 3d simulation of dislocation motion and interaction in a dicrete lattice, which is being developed. The results obtained will be synthetized and will serve as a basis for further modelization of the evolution with time and space of dislocation populations during straining and for constructing constitutive equations. Comparison with available data and with experiment will essentially deal with:(i) the length scales of the microstructure, (ii) slip propagation and localization, (iii) testing the constitutive equations through their predictive ability in the domain of polycrystalline textures.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology materials engineering crystals
- natural sciences physical sciences optics microscopy electron microscopy
- natural sciences chemical sciences inorganic chemistry post-transition metals
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
92322 CHATILLON
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.