Gradient and lamellar heterostructures for superior mechanical properties
Open Access
- 8 March 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in MRS Bulletin
- Vol. 46 (3), 244-249
- https://doi.org/10.1557/s43577-021-00056-w
Abstract
Heterostructured (HS) materials are a novel class of materials with mechanical properties that are superior over their conventional homogeneous counterparts. They are composed of HS zones with a dramatic difference in mechanical behaviors, which produces a synergistic effect on mechanical properties that are above the prediction by the rule-of-mixtures. Among all heterostructures, the two most studied are grain-size gradient structure and heterolamellar structure. These two heterostructures produce typical heterogeneous deformation during tensile deformation, producing long-range back stress in the soft zones and forward stress in the hard zones, which collectively produces hetero deformation-induced (HDI) stress to enhance the yield strength before yielding, and HDI hardening after yielding to retain ductility. In this article, we will focus on these two types of heterostructures. The issues, concerns, and progress are reviewed with the emphasis on the synergistic effect of mechanical properties, the fundamentals of several special plastic behaviors (e.g., strain gradient, HDI hardening and strain hardening), the plastic deformation mechanism, and the relationship between the microstructure and properties.Keywords
This publication has 55 references indexed in Scilit:
- Making strong nanomaterials ductile with gradientsScience, 2014
- Synergetic Strengthening by Gradient StructureMaterials Research Letters, 2014
- Extraordinary strain hardening by gradient structureProceedings of the National Academy of Sciences of the United States of America, 2014
- Evading the strength–ductility trade-off dilemma in steel through gradient hierarchical nanotwinsNature Communications, 2014
- Revealing Extraordinary Intrinsic Tensile Plasticity in Gradient Nano-Grained CopperScience, 2011
- Bauschinger and size effects in thin-film plasticityActa Materialia, 2006
- Geometrically necessary dislocation and size-dependent plasticityScripta Materialia, 2003
- On the role of strain gradients and long-range internal stresses in the composite model of crystal plasticityMaterials Science and Engineering: A, 2001
- Mechanism-based strain gradient plasticity— I. TheoryJournal of the Mechanics and Physics of Solids, 1999
- The deformation of plastically non-homogeneous materialsPhilosophical Magazine, 1970