2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 5. Meyers Intl. Symp. / Composite
| Editors: | F. Kongoli, P. Assis, H.A.C. Lopera, S. Diaz, S.N. Monteiro, V.S. Candido |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2025 |
| Pages: | 316 pages |
| ISBN: | 978-1-998384-46-4 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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MECHANISMS OF HARDENING IN INTERSTITIAL AND SUBSTITUTIONAL SOLID SOLUTIONS MATHEMATICAL DERIVATION
Sarah de Melo1; Pedro Henrique Poubel Mendonça da Silveira1; Ary Machado de Azevedo1; Sergio Monteiro1; Lucio Fabio Cassiano Nascimento1;1MILITARY INSTITUTE OF ENGINEERING, Rio de Janeiro, Brazil;
Type of Paper: Regular
Id Paper: 57
Topic: 18
Abstract:
Solid solution strengthening is an essential process for increasing the strength of metals. It occurs when solute atoms are introduced into a crystalline matrix [1,4]. The interaction between dislocations and solute atoms — which may occupy interstitial sites or substitute lattice positions — generates distortions that hinder dislocation motion, thus enhancing mechanical resistance [2,5]. Substitutional solutes cause spherical distortions in the lattice, creating compressive or tensile stress fields, while interstitial solutes, due to their smaller size, produce more significant distortions and interact more effectively with dislocations [1,6]. The elastic misfit energy resulting from these distortions is a fundamental component of the strengthening mechanism [4,7]. The mathematical modeling of these interactions allows for the estimation of interaction energy based on elastic theory, taking into account parameters such as solute concentration, atomic radius mismatch, and modulus difference [3,8]. Recent studies emphasize the importance of optimizing the concentration and type of solute atoms, as well as processing conditions such as temperature and strain rate, to maximize the strengthening effect in advanced metallic alloys [5–7].