2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
| Exploring the Paradox of Strength and Ductility Terence G. Langdon1; Roberto B. Figueiredo2; Praveen Kumar3; Megumi Kawasaki4; 1UNIVERSITY OF SOUTHAMPTON, Southampton, United Kingdom; 2FEDERAL UNIVERSITY OF MINAS GERAIS, Belo Horizonte, Brazil; 3INDIAN INSTITUTE OF SCIENCE, Bangalore, India; 4OREGON STATE UNIVERSITY, Corvallis, United States; PAPER: 233/SISAM/Invited (Oral) SCHEDULED: 11:45/Mon./Copacabana A (150/1st) ABSTRACT: Processing through the application of severe plastic deformation (SPD) produces exceptional grain refinement to the submicrometer or even the nanometer level. The paradox of strength and ductility was suggested several years ago [1] and has become a major topic in all studies of SPD metals. This paradox relates to the fact that metals may be strong or ductile, but generally they fail to exhibit both high strength and high ductility. Since SPD metals have very small grain sizes, it follows that the strength is usually high but the ductility is limited. This presentation examines the significance of this paradox and discusses possible procedures for at least partially alleviating the low ductility, which tends to be an inherent feature of these SPD nanomaterials. References: [1] R.Z.Valiev, I.V. Alexandrov, Y.T. Zhu, T.C. Lowe, "Paradox of strength and ductility in metals processed by severe plastic deformation," J. Mater. Res. Vol. 17, p. 5 (2002). |
