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Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale
K. Lu; L. Lu; S. Suresh
2009
Source PublicationScience
ISSN0036-8075
Volume324Issue:5925Pages:349-352
AbstractStrengthening materials traditionally involves the controlled creation of internal defects and boundaries so as to obstruct dislocation motion. Such strategies invariably compromise ductility, the ability of the material to deform, stretch, or change shape permanently without breaking. Here, we outline an approach to optimize strength and ductility by identifying three essential structural characteristics for boundaries: coherency with surrounding matrix, thermal and mechanical stability, and smallest feature size finer than 100 nanometers. We assess current understanding of strengthening and propose a methodology for engineering coherent, nanoscale internal boundaries, specifically those involving nanoscale twin boundaries. Additionally, we discuss perspectives on strengthening and preserving ductility, along with potential applications for improving failure tolerance, electrical conductivity, and resistance to electromigration.
description.department[lu, k.; lu, l.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [lu, l.; suresh, s.] mit, sch engn, cambridge, ma 02139 usa.;lu, k (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;lu@imr.ac.cn ssuresh@mit.edu
KeywordStrain-rate Sensitivity Stacking-fault Energy Nano-scale Twins Cu-al Alloys Nanocrystalline Metals Mechanical-properties Activation Volume Copper Deformation Behavior
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/32151
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
K. Lu,L. Lu,S. Suresh. Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale[J]. Science,2009,324(5925):349-352.
APA K. Lu,L. Lu,&S. Suresh.(2009).Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale.Science,324(5925),349-352.
MLA K. Lu,et al."Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale".Science 324.5925(2009):349-352.
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