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Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale
K. Lu; L. Lu; S. Suresh
2009
发表期刊Science
ISSN0036-8075
卷号324期号:5925页码:349-352
摘要Strengthening 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.
部门归属[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
关键词Strain-rate Sensitivity Stacking-fault Energy Nano-scale Twins Cu-al Alloys Nanocrystalline Metals Mechanical-properties Activation Volume Copper Deformation Behavior
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文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/32151
专题中国科学院金属研究所
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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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