Abstract
On the basis of reiterating the concept of grain boundary engineering (GBE), the recent progress in the theoretical models and mechanisms of twin-related GBE optimization and its effect on the mechanical properties is systematically summarized in this review. First, several important GBE-quantifying parameters are introduced, e.g., the fraction of special grain boundaries (GBs), the distribution of triple-junctions, and the ratio of twin-related domain size to grain size. Subsequently, some theoretical models for the GBE optimization in face-centered cubic (FCC) metals are sketched, with a focus on the model of “twin cluster growth” by summarizing the in-situ and quasi-in-situ observations on the evolution of grain boundary character distribution during the thermal-mechanical process. Finally, some case studies are presented on the applications of twin-related GBE in improving the various mechanical properties of FCC metals, involving room-temperature tensile ductility, high-temperature strength-ductility match, creep resistance, and fatigue properties. It has been well recognized that the mechanical properties of FCC materials could be obviously improved by a GBE treatment, especially at high temperatures or under high cyclic loads; under these circumstances, the materials are prone to intergranular cracking. In short, GBE has tremendous potential for improving the mechanical properties of FCC metallic materials, and it is a feasible method for designing high-performance metallic materials.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
General Materials Science,Metals and Alloys
Reference87 articles.
1. Hondros, E.D. (1996). The Donald McLean Symposium on Structural Materials: Engineering Application through Scientific Insight, Institute of Materials Cambridge University Press.
2. An approach to grain boundary design for strong and ductile polycrystals;Watanabe;Res. Mech.,1984
3. Grain Boundary Engineering;Aust;Can. Metall. Quart.,1994
4. Grain boundary engineering: Historical perspective and future prospects;Watanabe;J. Mater. Sci.,2011
5. Grain boundary engineering: An overview after 25 years;Randle;Mater. Sci. Technol.,2013
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