Publication Date:
2006-05-13
Description:
During plastic deformation of metals and alloys, dislocations arrange in ordered patterns. How and when these self-organization processes take place have remained elusive, because in situ observations have not been feasible. We present an x-ray diffraction method that provided data on the dynamics of individual, deeply embedded dislocation structures. During tensile deformation of pure copper, dislocation-free regions were identified. They showed an unexpected intermittent dynamics, for example, appearing and disappearing with proceeding deformation and even displaying transient splitting behavior. Insight into these processes is relevant for an understanding of the strength and work-hardening of deformed materials.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jakobsen, Bo -- Poulsen, Henning F -- Lienert, Ulrich -- Almer, Jonathan -- Shastri, Sarvjit D -- Sorensen, Henning O -- Gundlach, Carsten -- Pantleon, Wolfgang -- New York, N.Y. -- Science. 2006 May 12;312(5775):889-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Fundamental Research: Metal Structures in Four Dimensions, Materials Research Department, Riso National Laboratory, DK-4000 Roskilde, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16690859" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
,
Medicine
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Natural Sciences in General
,
Physics
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