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4 results on '"Asthana, R."'

1. Nomograms for rapid assessment of particle sedimentation behaviour in liquid phase processing of particle reinforced metal composites.

Author

Sobczak, J J, Drenchev, L, and Asthana, R

Subjects
NOMOGRAPHY (Mathematics), SEDIMENTATION & deposition, LIQUID phase epitaxy, METALLIC composites, FLOTATION, MATHEMATICAL models, METAL castings
Abstract

A procedure is developed for practical assessment of the sedimentation and flotation behaviours of particulate reinforcement in remelting and shape casting of particulate reinforced metal matrix composites. The procedure allows for rapid determination of combinations of particle size and particle volume fraction that yield identical sedimentation behaviours in different composite melts. The application of the procedure is demonstrated using composites of practical importance such as A359/SiCP, A359/Al2O3, A359/GrP and C90300/GrP composites. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
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2. Effect of pressure on solidification of metallic materials.

Author

Sobczak, J J, Drenchev, L, and Asthana, R

Subjects
RAPID solidification processing of metals, PRESSURE, METAL castings, GIBBS' free energy, MICROSTRUCTURE, NUCLEATION
Abstract

The effect of pressure on solidification structure formation in metal castings has been reviewed and explicitly expressed by thermodynamic relationships. In particular, pressure effects on phase diagrams, nucleation and growth, interfacial energy and diffusion coefficient are considered and analysed. Well known formulae and some new explicit relations are presented and discussed. Practical manifestations of the effect of pressure in casting structure formation are discussed. [ABSTRACT FROM AUTHOR] </p></dd> <dt class="blacklight-eds_authors col-md-3">Published</dt> <dd class="col-md-9 blacklight-eds_authors">2012</dd> <dt class="blacklight-eds_authors col-md-3"><span class="tags-custom">Full Text</span></dt> <dd class="col-md-9 blacklight-eds_authors"><a class="pdf-blue-icon" target="_blank" href="https://doi.org/10.1179/1743133611Y.0000000016">View/download PDF</a></dd> </dl> </article><article data-document-id="edb__52536343" data-document-counter="3" itemscope="itemscope" itemtype="http://schema.org/Thing" class="blacklight-academic-journal document document-position-3"> <header class="documentHeader row"> <h3 class="index_title document-title-heading col-sm-9 col-lg-10"> <span class="document-counter"> 3. </span> <a data-context-href="/articles/edb__52536343/track?counter=3&document_id=edb__52536343&search_id=14268186" href="/articles/edb__52536343">Reinforced cast metals: Part II Evolution of the interface.</a> </h3> <div class="index-document-functions col-sm-3 col-lg-2"> <form class="bookmark-toggle" data-doc-id="edb__52536343" data-present="In Bookmarks" data-absent="Bookmark" data-inprogress="Saving..." action="/bookmarks/edb__52536343" accept-charset="UTF-8" method="post"><input type="hidden" name="_method" value="put" /><input type="hidden" name="authenticity_token" value="nfVbY7hhoCchrzXSCuaRG8kUD9W18Oe4I2R30x7ArB8Qcjvymho0RM9Ytv+HG51XTNzvPjD/ywKHuFMbBIBgnw==" /> <input type="hidden" name="catalog_type" id="catalog_type" value="articles" /> <input type="submit" name="commit" value="Bookmark" id="bookmark_toggle_edb__52536343" class="bookmark-add btn btn-outline-secondary" data-disable-with="Bookmark" /> </form> </div> </header> <dl class="document-metadata dl-invert row"> <dt class="blacklight-eds_authors col-md-3">Author</dt> <dd class="col-md-9 blacklight-eds_authors mb-0"> <p class="truncate-text"> Asthana, R.</p></dd> <dt class="blacklight-eds_authors col-md-3">Subjects</dt> <dd class="col-md-9 blacklight-eds_authors"><searchLink fieldCode="DE" term="%22METAL+castings%22">METAL castings</searchLink>, <searchLink fieldCode="DE" term="%22COMPOSITE+materials%22">COMPOSITE materials</searchLink>, <searchLink fieldCode="DE" term="%22THERMODYNAMICS%22">THERMODYNAMICS</searchLink>, <searchLink fieldCode="DE" term="%22SOLIDIFICATION%22">SOLIDIFICATION</searchLink>, <searchLink fieldCode="DE" term="%22MICROSTRUCTURE%22">MICROSTRUCTURE</searchLink></dd> <dt class="blacklight-eds_languages col-md-3">Abstract</dt> <dd class="col-md-9 blacklight-eds_languages"><p class="truncate-text"> Interface evolution in metal-matrix composites is a thermodynamic necessity and interface design a kinetics challenge. The synergistic interaction between processing science and surface engineering has led to considerable progress in understanding, modelling and tailoring the fibre–matrix interface at the microstructural, crystallographic and atomic levels. The chemical, morphological, crystallographic and thermoelastic compatibilities between the fibre and the matrix influence the interfacial adhesion strength. This article examines the role of material properties and fabrication conditions in chemical interactions between the fibre and the matrix in metal-matrix composites synthesized using the solidification and casting techniques. © 1998 Chapman & Hall [ABSTRACT FROM AUTHOR] </p></dd> <dt class="blacklight-eds_authors col-md-3">Published</dt> <dd class="col-md-9 blacklight-eds_authors">1998</dd> <dt class="blacklight-eds_authors col-md-3"><span class="tags-custom">Full Text</span></dt> <dd class="col-md-9 blacklight-eds_authors"><a class="pdf-blue-icon" target="_blank" href="https://doi.org/10.1023/A:1004334228105">View/download PDF</a></dd> </dl> </article><article data-document-id="edb__52536305" data-document-counter="4" itemscope="itemscope" itemtype="http://schema.org/Thing" class="blacklight-academic-journal document document-position-4"> <header class="documentHeader row"> <h3 class="index_title document-title-heading col-sm-9 col-lg-10"> <span class="document-counter"> 4. </span> <a data-context-href="/articles/edb__52536305/track?counter=4&document_id=edb__52536305&search_id=14268186" href="/articles/edb__52536305">Reinforced cast metals: Part I Solidification microstructure.</a> </h3> <div class="index-document-functions col-sm-3 col-lg-2"> <form class="bookmark-toggle" data-doc-id="edb__52536305" data-present="In Bookmarks" data-absent="Bookmark" data-inprogress="Saving..." action="/bookmarks/edb__52536305" accept-charset="UTF-8" method="post"><input type="hidden" name="_method" value="put" /><input type="hidden" name="authenticity_token" value="+aCZ2p101iSH+Lw1rkgZ5H81TPhLU7yPjde0mGc2yNR/ZG8IqqEZeLyqykRwv9Xx8pF3z3hmNUEHhOsUB9wa+g==" /> <input type="hidden" name="catalog_type" id="catalog_type" value="articles" /> <input type="submit" name="commit" value="Bookmark" id="bookmark_toggle_edb__52536305" class="bookmark-add btn btn-outline-secondary" data-disable-with="Bookmark" /> </form> </div> </header> <dl class="document-metadata dl-invert row"> <dt class="blacklight-eds_authors col-md-3">Author</dt> <dd class="col-md-9 blacklight-eds_authors mb-0"> <p class="truncate-text"> Asthana, R.</p></dd> <dt class="blacklight-eds_authors col-md-3">Subjects</dt> <dd class="col-md-9 blacklight-eds_authors"><searchLink fieldCode="DE" term="%22METAL+castings%22">METAL castings</searchLink>, <searchLink fieldCode="DE" term="%22SOLIDIFICATION%22">SOLIDIFICATION</searchLink>, <searchLink fieldCode="DE" term="%22MICROSTRUCTURE%22">MICROSTRUCTURE</searchLink>, <searchLink fieldCode="DE" term="%22THERMAL+shielding%22">THERMAL shielding</searchLink>, <searchLink fieldCode="DE" term="%22METALLIC+composites%22">METALLIC composites</searchLink></dd> <dt class="blacklight-eds_languages col-md-3">Abstract</dt> <dd class="col-md-9 blacklight-eds_languages"><p class="truncate-text"> The solidification process in fibre- and particle-reinforced metals is modified due to solute screening, thermal shielding, heterogeneous nucleation, fluid damping, particle pushing and morphological instabilities at the liquid–solid–fibre boundary. These factors lead to considerable variations in grain size, grain morphology, microsegregation and macro-segregation, and reinforcement distribution in the matrix. This article examines the roles of the above factors in the evolution of solidification microstructure in composites under controlled growth as well as under normal casting conditions. © 1998 Chapman & Hall [ABSTRACT FROM AUTHOR] </p></dd> <dt class="blacklight-eds_authors col-md-3">Published</dt> <dd class="col-md-9 blacklight-eds_authors">1998</dd> <dt class="blacklight-eds_authors col-md-3"><span class="tags-custom">Full Text</span></dt> <dd class="col-md-9 blacklight-eds_authors"><a class="pdf-blue-icon" target="_blank" href="https://doi.org/10.1023/A:1004308027679">View/download PDF</a></dd> </dl> </article> </div> </div> </div> <div class='alternate-catalog' data-alternate-catalog="/catalog?q=%22Asthana%2C+R.%22"> <button type='button' class='alternate-catalog-close close' aria-label="Close"> <i class='fa fa-times-circle'></i> </button> <h3 class='alternate-catalog-title'></h3> <div class='alternate-catalog-body'> <div class='row'> <div class='col-md-6'> <h4 class="alternate-catalog-name"> Catalog </h4> <div class='alternate-catalog-desc'> Books, media, physical & digital resources </div> </div> <div class='col-md-6'> <a class="btn btn-primary" href="/catalog?q=%22Asthana%2C+R.%22"> See <span class="alternate-catalog-count"%></span> catalog results </a> </div> </div> <div class='row alternate-catalog-facet-section'> <div class='col-md-12'> <ul class="alternate-catalog-facets list-inline"> </ul> </div> </div> </div> </div> <div class="modal fade" id="loginModal" tabindex="-1" role="dialog"> <button type="button" id="loginclose" class="close" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">×</span> </button> <div class="modal-dialog" role="document"> <h5>Discovery Service for Jio Institute Digital Library</h5> <br /> <p>For full access to our library's resources, please sign in.</p> </div> <div class="login-modal-button-wrapper"> <button class="login-modal-sign-in"> <a rel="nofollow" data-method="post" href="/users/auth/saml">Sign In</a> </button> </div> </div> </section> </div> </main> <footer class="navbar navbar-inverse site-footer" style="position: static;"> <div class="container footer-container"> <div class="row"> <div class="col-xs-12 col-md-3 py-4 align-self-center site-footer-links-column"> <div class="footer-logo center-block"> <a href="https://library.jioinstitute.edu.in"> <img class="logo-img" src="/assets/Jio-DLLogo-b5a8a0808ea64b7ff5d156e304a4a034eee76224caf66c04cead90a411971fad.png" /> </a> </div> </div> <div class="col-xs-12 col-md-8 py-3 pb-5 pb-md-3 site-footer-links-column align-self-center"> <div class="row text-center footer-links-row"> <div class="col-4 col-sm-2"> <div class="navlink"><a href="https://library.jioinstitute.edu.in/contact">Contact</a></div> </div> <div class="col-4 col-sm-3"> <div class="navlink"><a href="https://library.jioinstitute.edu.in/access/covid-19-advisory">Covid-19 Advisory</a></div> </div> <div class="col-4 col-sm-2"> <div class="navlink"><a href="https://library.jioinstitute.edu.in/access/policies">Policies</a></div> </div> </div> </div> </div> </div> <div class="row text-center secondary-footer"> <div class="container"> <div class="col-xs-12 col-md-2 px-0"> <div class="footer-logo"> <a href="https://jioinstitute.edu.in/"> <img class="logo-img" src="/assets/JioLogoWhite-3a250c43ad67a5117225db9885c1ac0b116f92a0df0839e850e68dfbbce66ae7.png" /> </a> </div> </div> <div class="col-md-1 col-4 py-1 py-md-3"> <div class="navlink footer-navlink"><a href="https://jioinstitute.edu.in/about">About Us</a></div> </div> <div class="col-md-1 col-4 py-1 py-md-3"> <div class="navlink footer-navlink"><a href="https://jioinstitute.edu.in/academics">Academics</a></div> </div> <div class="col-md-1 col-4 py-1 py-md-3"> <div class="navlink footer-navlink"><a href="https://jioinstitute.edu.in/research-overview">Research</a></div> </div> <div class="col-md-1 col-4 py-1 py-md-3 pl-0 pr-0"> <div class="navlink footer-navlink"><a href="https://jioinstitute.edu.in/campus-life"> Campus Life</a></div> </div> <div class="col-md-1 col-4 py-1 py-md-3"> <div class="navlink footer-navlink"><a href="https://jioinstitute.edu.in/contacts"> Contact</a></div> </div> <div class="col-md-4 col-4 py-1 py-md-3"> <div class="navlink footer-navlink float-right"><a href="https://jioinstitute.edu.in/terms-conditions">T&C</a></div> </div> <div class="col-md-1 col py-1 py-md-3 pl-0"> <div class="navlink footer-navlink float-right"><a href="https://jioinstitute.edu.in/privacy-policy"> Privacy Policy</a></div> </div> </div> </div> <!-- Global site tag (gtag.js) - Google Analytics --> <script async src=https://www.googletagmanager.com/gtag/js?id=G-R4B0KJQ5EY></script> <script> window.dataLayer = window.dataLayer || []; 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