Download or read book Microstructure and Tensile Properties of Electrical Steel Sheets written by Eva Anne Mørtsell and published by . This book was released on 2011 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Manufacturing on Microstructure and Magnetic Properties of Non oriented Electrical Steel written by Aroba Saleem and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The development of highly efficient electrical machines may lead to the conservation of electrical energy. Besides an improved design, the better selection of material and broader knowledge of the influence of manufacturing on the resulting magnetic properties may help to reach this target. Electrical steel grades are the normal construction material for electrical motors and transformers because of their enhanced soft magnetic properties. The magnetic characteristics of electrical steels are closely related to losses. Non-oriented electrical steels (NOES) are the most economical choice of material used in electrical machines to transform electricity in movement, as in electric car motors. In electromagnetic devices, the non-oriented electrical steel is often subjected to different mechanical stresses induced due to manufacturing such as cutting, interlocking and welding. Thus, it is important to evaluate magnetic properties under conditions present in actual electrical machines and understand the relationships between the magnetic properties and mechanical stresses induced. In addition, the mechanical cutting processes induce plastic deformation near the edges, which also affects the magnetic properties. Hence, the current research is to study magnetic properties of NOES and residual stress and deformation induced due to manufacturing and present the relation between microstructure, mechanical and magnetic properties affected by cutting.Punching is a common process for manufacturing of cores of electric motors and causes shearing near the edge, resulting in degradation of magnetic properties. The deterioration of magnetic properties due to punching is commonly investigated using rectangular or toroidal samples in magnetic measurements units without focussing much on the microstructural changes near the edge. The present work has pursued this objective of analysing the microstructural changes due to punching and study the effect of punching load on microstructure near the edge. This work was accomplished by observing the cross section of the punched sample using scanning electron microscope (SEM) and analyzing the back scattered electron imaging (BSE) and electron back scattered diffraction (EBSD) micrographs. In addition, nanoindentation was performed to study the change in hardness near the edge due to punching. An attempt was made to separate the residual stress and deformation regions based on the microstructural and mechanical property correlation. Other cutting methods such as shear cutting, and laser cutting were also studied in the present work.These microstructural effects due to cutting were further related to magnetic properties. The investigation of magnetic property degradation due to shear cutting and laser cutting was done using a single sheet tester (SST). In addition, the core loss separation was employed to see the change in hysteresis and eddy current loss component separately, due to cutting. Finally, the effect of different cutting processes was compared, and a relation was established between the microstructure, mechanical properties and magnetic properties of non-oriented electrical steel." --
Download or read book Introduction to Texture Analysis written by Olaf Engler and published by CRC Press. This book was released on 2009-11-16 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of Introduction to Texture Analysis: Macrotexture, Microtexture, and Orientation Mapping broke new ground by collating seventy years worth of research in a convenient single-source format. Reflecting emerging methods and the evolution of the field, the second edition continues to provide comprehensive coverage of the concepts, pra
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1963 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relation Between Microstructure and Mechanical Properties of a Low alloyed TRIP Steel written by Kemal Davut and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstructure Evolution in Deformed and Recrystallized Electrical Steel written by Dejan Stojakovic and published by . This book was released on 2008 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: A processing route has been developed for recovering the desired lambda fiber in ironsilicon electrical steel needed for superior magnetic properties in electric-motor application. The lambda fiber texture is available in directionally solidified iron-silicon steel with the 001 columnar grains but was lost after heavy rolling and recrystallization required for motor laminations. Two steps of light rolling each followed by recrystallization were found to largely restore the desired fiber texture. This strengthening of the 001 fiber texture had been predicted on the basis of the strain induced boundary migration mechanism during recrystallization of lightly rolled steel from existing grains of near the ideal orientation, due to postulated low stored energies. Taylor and finite element models supported the idea of the low stored energy of the lambda fiber grains. A novel methodology has been developed for converting the nanoindentation loaddisplacement data into indentation stress-strain curves and extracting the elastic and postelastic behavior. Extracted variations of effective indentation modulus with orientation were in excellent agreement with previously developed model. Furthermore, an intrinsic orientation dependence of indentation yield strength was extracted in a strain-free material. Developed nanoindentation methodology was successfully used for characterization of microstructure evolution in terms of stored energy variation with orientation during plane strain compression. Variations in stored energy at the grain-scale level were extracted from an increment in indentation yield due to increase in dislocation density. It was found that nanoindentation yield strength is about 2 times the yield strength of homogeneous compression. Moreover, higher indentation yield strength was observed in regions that have rotated during deformation to non-lambda orientations with higher Taylor factors. Experimental results have supported idea of correlation between the Taylor factor and stored energy that was used in multistage processing for successful recovery of lambda texture. Hypothesis for observed much higher strain hardening in nanoindentation than in homogeneous plane strain compression is that the rate of generation of new dislocations is dependent on the dislocation density alone while the rate of annihilation of dislocation is strongly dependent on both dislocation density and the type of dislocations being generated which can be influenced by deformation mode.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Joining Processes written by Lucas F. M. da Silva and published by Elsevier. This book was released on 2020-10-31 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Joining Processes: Welding, Plastic Deformation, and Adhesion brings together a range of advanced thermal, mechanical, and chemical methods of joining, offering an up-to-date resource for those looking to understand and utilize the very latest techniques. Efficient joining techniques are critical to a range of innovative applications, with technology in constant development. The first section of the book provides in-depth information on advanced welding techniques, including friction stir, explosive, ultrasonic, laser, electron beam, and computational weld analysis and fatigue of structures. The second section highlights key developments in joining by plastic deformation, adhesive bonding, and hybrid joining. The coverage of each technique is supported by practical guidance, detailed analysis, and finite element simulations. This is an essential reference for researchers and advanced students in joining, welding, adhesion, materials processing, mechanical engineering, plastics engineering, manufacturing, civil engineering, and automotive/aerospace engineering, as well as engineers, scientists, and R&D professionals, using joining, welding, and adhesion methods, across a range of industries. Presents the latest research findings and developments across welding, joining by plastic deformation, and adhesion Includes state-of-the-art methods, such as laser, ultrasonic and electron beam welding, hybrid joining, and the use of electromagnetic pulses Offers practical guidance, detailed analysis, and finite element simulations, for all techniques covered
Download or read book ISIJ International written by and published by . This book was released on 2011-02 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PRICM7 written by Jian Feng Nie and published by Trans Tech Publications Ltd. This book was released on 2010-06-30 with total page 3000 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected, peer reviewed papers from the Seventh Pacific Rim International Conference on Advanced Materials and Processing, August 2-6, 2010, Cairns, Australia
Download or read book Electrical Steels written by Anthony Moses and published by Energy Engineering. This book was released on 2019-03 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical steels are critical components of magnetic cores used in applications ranging from large rotating machines, including energy generating equipment, and transformers to small instrument transformers and harmonic filters. Presented over two volumes, this comprehensive handbook provides full coverage of the state-of-the-art in electrical steels. Volume 1 covers the fundamentals and basic concepts of electrical steels. Topics covered include soft magnetic materials; basic magnetic concepts; magnetic domains, energy minimisation and magnetostriction; methods of observing magnetic domains in electrical steels; electromagnetic induction; fundamentals of a.c. signals; losses and eddy currents in soft magnetic materials; rotational magnetisation and losses; anisotropy of iron and its alloys; magnetic circuits; the effect of mechanical stress on loss, permeability and magnetostriction; magnetic measurements on electrical steels; background to modern electrical steels; production of electrical steels; amorphous and nano-crystalline soft magnetic materials; nickel-iron, cobalt-iron and aluminium-iron alloys; consolidated iron powder and ferrite cores; and temperature and irradiation dependence of magnetic and mechanical properties of soft magnetic materials. The companion Volume 2 describes performance and outlines applications. oduction of electrical steels; amorphous and nano-crystalline soft magnetic materials; nickel-iron, cobalt-iron and aluminium-iron alloys; consolidated iron powder and ferrite cores; and temperature and irradiation dependence of magnetic and mechanical properties of soft magnetic materials. The companion Volume 2 describes performance and outlines applications.
Download or read book Time Dependent Constitutive Behavior and Fracture Failure Processes Volume 3 written by Tom Proulx and published by Springer Science & Business Media. This book was released on 2011-05-10 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This the third volume of six from the Annual Conference of the Society for Experimental Mechanics, 2010, brings together 56 chapters on Time-Dependent Constitutive Fracture and Failure. It presents early findings from experimental and computational investigations on Time Dependent Materials including contributions on Thermal and Mechanical Characterization, Coupled Experimental and Computational Analysis of Fracture Path Selection, Procedures for Mixed Mode Fracture Testing of Bonded Beams, and Experimental Study of Voids in High Strength Aluminum Alloys.
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallography and Microstructure in Ancient and Historic Metals written by David A. Scott and published by Getty Publications. This book was released on 1992-01-02 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: David A. Scott provides a detailed introduction to the structure and morphology of ancient and historic metallic materials. Much of the scientific research on this important topic has been inaccessible, scattered throughout the international literature, or unpublished; this volume, although not exhaustive in its coverage, fills an important need by assembling much of this information in a single source. Jointly published by the GCI and the J. Paul Getty Museum, the book deals with many practical matters relating to the mounting, preparation, etching, polishing, and microscopy of metallic samples and includes an account of the way in which phase diagrams can be used to assist in structural interpretation. The text is supplemented by an extensive number of microstructural studies carried out in the laboratory on ancient and historic metals. The student beginning the study of metallic materials and the conservation scientist who wishes to carry out structural studies of metallic objects of art will find this publication quite useful.
Download or read book Steels written by Robert William Kerr Honeycombe and published by Hodder Education. This book was released on 1982 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
