Microstructural Design for Improved Mechanical Behaviour of Advanced Materials
J. Phys. IV France 10 (2000) Pr6-41-Pr6-46
Grain boundary engineering for high performance structural and functional materialsT. Watanabe
Laboratory of Materials Design and Interface Engineering, Department of Machine Intelligence and Systems Engineering, Graduate School of Engineering, Tohoku University, 980-8579, Japan
Recent progress in grain boundary engineering is discussed focussing on several key issues associated with development of high performance structural and functional materials. The control of intergranular brittleness has been found to be generally applicable by the introduction of a higher fraction of fracture-resistant special boundaries like low-∑ boundaries and by the reduction of the fraction of weak random boundaries. The most recent achievement of the control of oxidation-induced intergranular brittleness in a Ni-40at.%Fe alloy and of the development of a high performance ferromagnetic shape-memory Fe-30at.%Pd alloy by grain boundary engineering, has been introduced.
© EDP Sciences 2000