Download or read book Surface Characterization of Carbon Fiber Polymer Composites and Aluminum Alloys After Laser Interference Structuring written by and published by . This book was released on 2016 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, the increasing use of Carbon Fiber-reinforced Polymer matrix Composites (CFPC) and aluminum alloys as lightweight materials in the automotive and aerospace industries demands enhanced surface preparation and control of surface morphology prior to joining. In this study, surfaces of both composite and aluminum were prepared for joining using an Nd:YAG laser in a two-beam interference setup, enabling the (a) structuring of the AL 5182 surface, (b) removal of the resin layer on top of carbon fibers, and (c) structuring of the carbon fibers. CFPC specimens of T700S carbon fiber, Prepreg - T83 epoxy, 5 ply thick, 0/90o plaques were used. The effect of laser fluence, scanning speed, and number of shots-per-spot was investigated on the removal rate of the resin without an excessive damage of the fibers. Optical micrographs, 3D imaging, and scanning electron microscope (SEM) imaging were used to study the effect of the laser processing on surface morphology.
Download or read book Characterization of Aluminum Silicon short Carbon Fiber Composites Fabricated by Novel Thixomixing Method written by Ebrahim Akbarzadeh and published by . This book was released on 2017 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The metal matrix composites (07C) are widely used in different applications and offer high strength-to-weight ratio. In this thesis, it was developed a novel method to fabricate composite material in semi-solid state of aluminum with short carbon fibers (Cs f ). The semi-solid slurry of aluminum silicon alloys represent thixotropic feature when sheared. The intensive shear stress created by high viscosity at mushy zone impacts on uniform distribution and effective dispersion of Cs f into the eutectic without serious physical or chemical damages. For this process, called thixomixing, a prototype mixer was designed to study on A356, A357 and hypereutectic 4047 alloys. The homogenous distribution ofCs f were obtained under optimum conditions: around 48% of solid fraction in slurry and 100 rpm mixing speed. The Cs f was wetted in the molten of eutectic when the primary a-phase was formed. Deposition of silicon or intermetallic compounds on the fiber surface improves wettability aluminum and provides relatively good adherence. The extruded and T6 heat treated Al composites had around 24% improvement of mechanical strength. The fractography analysis illustrated the ductile fracture with some plastic deformation as the results of dimples and some fiber pullout in the fractured surface. Ultra-micro hardness evaluation showed relatively good interfacial bonding after heat treatment. Hypereutectic aluminum alloy (4047)/Cs f composite was used to evaluate the tribological properties. This composite showed low coefficient of friction, when the Cs f acts self-lubricant material. Taguchi method was employed to design the experiments to analyze the effects of the sliding speed, applied load and the volume fraction of Cs f on the tribological properties of thixomixed Al/Cs f composite. The contribution percentage for each parameter was determined by the analysis of variance. The results were indicated that Al/Cs f composite had better tribological properties than matrix alloy due to the carbon as solid-lubricant. The interfacial adherence of matrix/Cs f was shown with no fibers pull out in the tracking area. The presence of coherent and adherent graphite-rich layer on the worn surface was detected. Electrochemical tests were conducted over three alloys, Al/Cs f composites with and without T6 heat treatment. The exposure surfaces were evaluated by SEM in order to find out the localized corrosion and the interfacial adherence. The Cs f , Si particles and iron-intermetallics play as cathode and the matrix as anode to form a galvanic couples. The corrosion current density was decreased for un-reinforced alloys in compare to the composite samples.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbon Nanotube Polymer Composites written by Dimitrios Tasis and published by Royal Society of Chemistry. This book was released on 2015-11-09 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemically-modified carbon nanotubes (CNTs) exhibit a wide range of physical and chemical properties which makes them an attractive starting material for the preparation of super-strong and highly-conductive fibres and films. Much information is available across the primary literature, making it difficult to obtain an overall picture of the state-of-the-art. This volume brings together some of the leading researchers in the field from across the globe to present the potential these materials have, not only in developing and characterising novel materials but also the devices which can be fabricated from them. Topics featured in the book include Raman characterisation, industrial polymer materials, actuators and sensors and polymer reinforcement, with chapters prepared by highly-cited authors from across the globe. A valuable handbook for any academic or industrial laboratory, this book will appeal to newcomers to the field and established researchers alike.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Japanese Science and Technology 1983 1984 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch and published by . This book was released on 1985 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1995 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1994 with total page 1584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Japanese Science and Technology written by and published by . This book was released on 1986 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference Papers Index written by and published by . This book was released on 1987 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monthly. Papers presented at recent meeting held all over the world by scientific, technical, engineering and medical groups. Sources are meeting programs and abstract publications, as well as questionnaires. Arranged under 17 subject sections, 7 of direct interest to the life scientist. Full programs of meetings listed under sections. Entry gives citation number, paper title, name, mailing address, and any ordering number assigned. Quarterly and annual indexes to subjects, authors, and programs (not available in monthly issues).
Download or read book NASA SP written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Engineering Index Annual written by and published by . This book was released on 1992 with total page 2264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Download or read book Metallurgical Transactions written by and published by . This book was released on 1991 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science Abstracts written by and published by . This book was released on 1992 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
