iMechanica - dislocation nucleation; nanograin; nanophenomena
https://imechanica.org/taxonomy/term/438
enNanostructured Metals Reveal Their Secret Strengthening Mechanisms
https://imechanica.org/node/578
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/438">dislocation nucleation; nanograin; nanophenomena</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><span>It is well known that metals are hardened by deformation and soften by annealing. How about nanostructured metals? Can we reply on conventional metal-working lore? In a paper in Science (Huang et al., <a href="http://www.sciencemag.org/cgi/content/abstract/312/5771/249">Science, 312 (2006) 249</a>), Xiaoxu Huang and colleagues at the Riso National Laboratory, Denmark and Osaka University, Japan have found that nanostructured aluminum behaves in contrast to the conventional theories; annealing makes it stronger and tougher whereas deformation (cold working) gains ductility with a trade-off of lowering the strength. The structural scale affects fundamental mechanisms of dislocation-dislocation and dislocation-interface reactions. This finding may stimulate the applied mechanics community to study the fundamental strengthening mechanisms of nanostructured materials from both experimental and theoretical approaches.</span></p>
</div></div></div>Sat, 16 Dec 2006 18:06:43 +0000Xiaodong Li578 at https://imechanica.orghttps://imechanica.org/node/578#commentshttps://imechanica.org/crss/node/578Error | iMechanica