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https://imechanica.org/taxonomy/term/12900
enCompressive performance and crack propagation in Al alloy/Ti2AlC composites
https://imechanica.org/node/24385
<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/12634">Max phase</a></div><div class="field-item odd"><a href="/taxonomy/term/694">crack propagation</a></div><div class="field-item even"><a href="/taxonomy/term/934">Composites</a></div><div class="field-item odd"><a href="/taxonomy/term/12900">Cermet</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>Abstract</p>
<p>Composite materials comprising a porous Ti<span>2</span><span><span><span>AlC matrix and Al 6061 alloy were fabricated by a current-activated pressure assisted melt infiltration<span> process. Coarse, medium and fine meso-structures were prepared with Al alloy filled pores of differing sizes. Materials were subjected to uniaxial compressive loading up to stresses of 668 MPa, leading to the failure of specimens through crack propagation in both phases. As-fabricated and post-failure specimens were analysed by X-ray microscopy and </span></span>electron microscopy<span>. Quasi-static mechanical testing results revealed that compressive strength was the highest in the fine structured composite materials. While the coarse structured specimens exhibited a compressive strength of 80% relative to this. Reconstructed micro-scale X-ray </span></span>tomography data revealed different crack propagation mechanisms. Large planar shear cracks propagated throughout the fine structured materials while the coarser specimens exhibited networks of branching cracks propagating preferentially along Al alloy-Ti</span><span>2</span>AlC phase interfaces and through shrinkage pores in the Al alloy phase. Results suggest that control of porosity, compensation for Al alloy shrinkage and enhancement of the Al alloy-Ti<span>2</span>AlC phase interfaces are key considerations in the design of high performance metal/Ti<span>2</span>AlC phase composites.</p>
<p><a href="https://www.sciencedirect.com/science/article/abs/pii/S0921509316307419">Materials Science and Engineering A</a>, <a title="Go to table of contents for this volume/issue" href="https://www.sciencedirect.com/science/journal/09215093/672/supp/C">Volume 672</a><span>, </span><span>30 August 2016</span><span>, Pages 247-256</span></p>
<p><a class="doi" title="Persistent link using digital object identifier" href="https://doi.org/10.1016/j.msea.2016.06.073" target="_blank" rel="noopener noreferrer">https://doi.org/10.1016/j.msea.2016.06.073</a></p>
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<tr class="odd"><td><span class="file"><img class="file-icon" alt="PDF icon" title="application/pdf" src="/modules/file/icons/application-pdf.png" /> <a href="https://imechanica.org/files/Compressive%20performance%20and%20crack%20propagation%20in%20Al%20alloy%20Ti2AlC%20composites_0.pdf" type="application/pdf; length=8645906">Compressive performance and crack propagation in Al alloy Ti2AlC composites.pdf</a></span></td><td>8.25 MB</td> </tr>
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</div></div></div>Thu, 16 Jul 2020 14:19:25 +0000Dr. Hanaor - Department of Ceramic Materials - TU Berlin24385 at https://imechanica.orghttps://imechanica.org/node/24385#commentshttps://imechanica.org/crss/node/24385Error | iMechanica