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作者： Labisz, Krzysztof Taski, Tomasz Krupiska, Beata Krupiski, Mariusz Pakiela, Wojciech Division of Materials Processing Technology Management and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego Str 18A Gliwice Poland

ISBN: (纸本)9783038352556

The purpose of this paper was the investigation of laser treatment influence on the microstructure and properties of the surface layer of heat treated Al-Si-Cu cast aluminium alloys, using the high power diode laser (HPDL). The performed laser treatment involves remelting and feeding of ZrO2 ceramic powder into the aluminium surface. © (2014) Trans Tech Publications, Switzerland.

关键词： Aluminum alloys

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Influence of the HPDL surface treatment of the X40CrMoV5-1 tool steel on wear resistance

Influence of the HPDL surface treatment of the X40CrMoV5-1 t...

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作者： Jonda, Ewa Lukaszkowicz, Krzysztof Division of Materials Processing Technology Management and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego Str 18A Gliwice Poland

ISBN: (纸本)9783038352556

The paper presents the effect of alloying with WC and TaC powders on structure and mechanical properties of the X40CrMoV5-1 steel surface layer using the HPDL (High Power Diode Laser). The metallographic investigations on light microscope show that during alloying the X40CrMoV5-1 hot work tool steel with the WC and TaC powder the obtained run face is characteristic of the high roughness, multiple pores, irregularity, and flashes at the borders. The changes of the surface layers hardness formed as a result of alloying with ceramic powders containing carbides are accompanied with the increased tribological properties. The microstructure of the alloyed layers which were formed on the surface of the investigated hot work steel was examined using optical microscope. The tribological wear relationships using pin-on-disc test were specified for surface layers subject to laser treatment, determining the friction coefficient, and mass loss of the investigated surfaces. © (2014) Trans Tech Publications, Switzerland.

关键词： Semiconductor lasers

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Influence of hot-working conditions on a structure of X11MnSiAl17-1-3 steel

Influence of hot-working conditions on a structure of X11MnS...

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作者： Dobrzaski, Leszek Adam Czaja, Malgorzata Borek, Wojciech Labisz, Krzysztof Taski, Tomasz Division of Materials Processing Technology Management and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology ul. Konarskiego 18A Gliwice Poland

ISBN: (纸本)9783038352556

The investigations are focused on high-manganese austenitic steels used for reinforcing elements of car body. The purpose of this work was to examine the influence of thermo-mechanical treatment workout using Gleeble simulator and LPS module for semi-industrial hot-rolling on the structure and transformations occurring during cold deformations. Thermo-mechanical treatment consists of four passovers with a planned strain rate of about 20%. There were three variants of cooling after thermo-mechanical treatment: cooling in water, natural air-cooling and cooling in water after isothermal holding in the temperature of last deformation 850°C for 30 s. Structural observation were carried on LEICA MEF4A light microscope, analysis of the chemical composition were made with X’Pert PRO diffractometer, and the results were analyzed with OriginLab. It was found that the high-manganese austenitic X11MnSiAl7-1-3 steel after thermo-mechanical treatment on Gleeble simulator is characterized by dynamically recrystallized structure. In intervals time between each compression metadynamic and static recrystallization take place. After hot-rolling these steels has austenitic structure with dynamically recovered grains and with small metadynamically and statically recrystallized grains that are located on a border of elongated grains of austenite. © (2014) Trans Tech Publications, Switzerland.

关键词： Cooling

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Mechanical properties of high-manganese austenitic TWIP-type steel

Mechanical properties of high-manganese austenitic TWIP-type...

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8th International Conference on processing and Manufacturing of Advanced materials, THERMEC 2013

作者： Dobrzański, Leszek Adam Borek, Wojciech Mazurkiewicz, Janusz Division of Materials Processing Technology Management and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego 18A 44-100 Gliwice Poland

ISBN: (纸本)9783038350736

Taking into consideration increased quantity of accessories used in modern cars, decreasing car's weight can be achieved solely by optimization of sections of sheets used for bearing and reinforcing elements as well as for body panelling parts of a car. Application of sheets with lower thickness requires using sheets with higher mechanical properties, however keeping adequate formability. The goal of structural elements such as frontal frame side members, bumpers and the others is to take over the energy of an impact. Therefore, steels that are used for these parts should be characterized by high value of UTS and UEl, proving the ability of energy absorption. Among the wide variety of recently developed steels, high-manganese austenitic steels with low stacking faulty energy are particularly promising, especially when mechanical twinning occurs. Beneficial combination of high strength and ductile properties of these steels depends on structural processes taking place during cold plastic deformation, which are a derivative of SFE of austenite, dependent, in turn on the chemical composition of steel and deformation temperature. High-manganese austenitic steels in effect of application of proper heat treatment or thermo-mechanical treatment can be characterized by different structure assuring the advantageous connection of strength and plasticity properties. Proper determinant of these properties can be plastic deformation energy supply determined by integral over surface of cold plastic deformation curve. Obtaining of high strength properties with retaining the high plasticity has significant influence for the development of highmanganese steel groups and their significance for the development of materials engineering. © (2014) Trans Tech Publications, Switzerland.

关键词： Austenite

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High manganese austenitic X6MnSiAlNBTi26-3-3 steel - characteristic, structures and properties

High manganese austenitic X6MnSiAlNBTi26-3-3 steel - charact...

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作者： Borek, Wojciech Czaja, Malgorzata Labisz, Krzysztof Taski, Tomasz Krupiski, Mariusz Rusz, Stanislav Division of Materials Processing Technology Management and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology ul. Konarskiego 18A Gliwice Poland VŠB-Technical University of Ostrava 17.listopadu 15 Ostrava Czech Republic

ISBN: (纸本)9783038352556

The aim of this paper is to determine the high-manganese austenite propensity to twinning induced by the cold working and its effect on structure and mechanical properties, and especially the strain energy per unit volume of new-developed high-manganese Fe – Mn – (Al, Si) investigated steel with various structures after their thermo-mechanical treatments. The new-developed highmanganese steel provides an extensive potential for automotive industries through exhibiting the twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) mechanisms. TWIP steels not only show excellent strength, but also have excellent formability due to twinning, thereby leading to excellent combination of strength, ductility, and formability over conventional dual phase steels or transformation induced plasticity TRIP steels. © (2014) Trans Tech Publications, Switzerland.

关键词： Mechanisms

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Fatigue Behaviour of Sintered Duplex Stainless Steel

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Procedia Engineering 2014年 74卷 421-428页

作者： T. Tański Z. Brytan K. Labisz Division of Materials Processing Technology and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego St. 18a 44-100 Gliwice Poland Division of Biomaterials Engineering Institute of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego St. 18a 44-100 Gliwice Poland

The stainless steel despite of tradition of use over the 100 years are steel interesting in terms of metallurgical improvement and development of new products. Stainless steel products undergo intensive development, especially for duplex stainless steel grades manufacture be conventional casting method and metal forming processes, thus, influences an increase in the interest of those materials by alternative technologies of metal forming, which is powder metallurgy. The powder metallurgy and manufacturing processes of metal powders and sintered components production undergoing rapid development. This trend applies also for sintered duplex stainless steels. The paper investigates fatigue behaviours of vacuum sintered duplex stainless steel produced by mixing in appropriate proportions powders of ferritic and austenitic stainless steel and elemental alloying powders and then sinter hardening in a vacuum. The mechanical properties of studied steel were evaluated in terms of tensile strength, hardness, toughness, plasticity. Fatigue tests were carried out in symmetric plane bending at stress ratio R= – 1 with frequency of about 24 Hz. Fatigue crack propagation micromechanisms were investigated by means of a scanning electron microscope fracture surface analysis.

关键词： Powder Metallurgy Duplex stainless steel Mechanical properties

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Thermal Fatigue Influence of Laser Treated Tool Steel Surface

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Procedia Engineering 2014年 74卷 429-442页

作者： T. Tański K. Labisz Z. Brytan E. Jonda M. Sroka Division of Materials Processing Technology Management and Computer Techniques in Materials Science Institute of Engineering Materials and Biomaterials Silesian University of Technology ul. Konarskiego 18a 44-100 Gliwice Poland Division of Biomaterials Engineering Institute of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego St. 18a 44-100 Gliwice Poland

This research project presents the investigation results of laser remelting and alloying especially the laser parameters and its influence on the structure and properties of the surface of the 32CrMoV12-28 and X38CrMoV5-3 hot work steels, using the high power diode laser (HPDL). As a result of the performed research structure changes were determined concerning the grain size and reinforcement ceramic particle distribution in the steel surface layer. The reason of this work was to determine the optimal laser treatment parameters, particularly the laser power applied to achieve good layer mechanical properties for protection of this hot work tool steel from losing their work stability and to make the tool surface more resistant to action in hard working conditions. For alloying the tantalum carbide TaC, niobium carbide NbC as well as titanium carbide TiC powders were used. For investigations of the alloyed samples hardness and microhardness measurements of the different remelting areas were performed. The remelted layers which were formed in the surface of investigated hot work steel were examined metallographically and analyzed using light and scanning electron microscope as well as the investigations concerning ear resistance of the produced surface layer were carried out

关键词： Manufacturing and processing Surface treatment Heat treatment Thermal fatigue Hot work tool steel High Power Diode Laser

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Analysis of the State of the Fine-Dispersive Precipitations in the Structure of High Strength Steel Weldox 1300 by Means of Electron Diffraction

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Journal of Iron and Steel Research International 2011年第S1期18卷 135-142页

作者： Ozgowicz Wojciech Labisz Krzysztof Division of Constructional and special Materials Division of Materials Processing Technology Management and Computer Techniques in Materials ScienceInstitute of Engineering Materials and BiomaterialsSilesian University of TechnologyKonarskiego St.18A44-100 GliwicePoland

The paper deals with investigations concerning the structure and state of dispersive precipitations of the phases consolidating in the high-strength steel Weldox 1300 after its high temperature thermomechanical *** use of transmission technique of electron microscopy (TEM) mainly the microstructure and morphology of martensite was analysed,as well as the state of dispersive precipitations of carbides and nitrides resulting from microadditives of such alloys as Nb,V,Ti or B,introduced into the *** revealed both a fine lathed and twin structure of the matrix of martensite in the investigated *** means of the method of electron diffraction particles of secondary strengthening phases of the M(C,N) type of a nanocrystalline size could be identified,and also non-metallic oxide inclusions,affecting the mechanism of strengthening of the investigated steel.

关键词： weldox 1300 HSLA steel thermomechanical treatment martensitic steel structural steel

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Combined Measurement of the Higgs Boson Mass in pp Collisions at s=7 and 8 TeV with the ATLAS and CMS Experiments

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Physical Review Letters 2015年第19期114卷 191803-191803页

作者： G. Aad B. Abbott J. Abdallah O. Abdinov R. Aben M. Abolins O. S. AbouZeid H. Abramowicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye A. A. Affolder T. Agatonovic-Jovin J. A. Aguilar-Saavedra S. P. Ahlen F. Ahmadov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akimoto A. V. Akimov G. L. Alberghi J. Albert S. Albrand M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander T. Alexopoulos M. Alhroob G. Alimonti L. Alio J. Alison S. P. Alkire B. M. M. Allbrooke P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheimer B. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi B. T. Amadio K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio Bella G. Arabidze Y. Arai J. P. Araque A. T. H. Arce F. A. Arduh J-F. Arguin S. Argyropoulos M. Arik A. J. Armbruster O. Arnaez V. Arnal H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni S. Asai N. Asbah A. Ashkenazi B. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. B. Atlay B. Auerbach K. Augsten M. Aurousseau G. Avolio B. Axen M. K. Ayoub G. Azuelos M. A. Baak A. E. Baas C. Bacci H. Bachacou K. Bachas M. Backes M. Backhaus E. Badescu P. Bagiacchi P. Bagnaia Y. Bai T. Bain J. T. Baines O. K. Baker P. Balek T. Balestri F. Balli E. Banas Sw. Banerjee A. A. E. Bannoura H. S. Bansil L. Barak S. P. Baranov E. L. Barberio D. Barberis M. Barbero T. Barillari M. Barisonzi T. Barklow N. Barlow S. L. Barnes B. M. Barnett R. M. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa R. Bartoldus A. E. Barton P. Bartos A. Bassalat A. Basye R. L. Bates S. J. Batista J. R. Batley M. Battaglia M. Bauce F. Bauer H. S. Bawa J. B. Beach CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Academia Sinica Taipei Taiwan Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel CERN Geneva Switzerland Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Laboratorio de Instrumentacao e Fisica Experimental de Particulas-LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada (Spain) Portugal Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy Dipartimento di Fisica Università di Roma Tor Vergata Roma Italy Fysiska institutionen Lunds universitet Lund Sweden International Center for Elementary Particle Physics and Depart

A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4ℓ decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. The measured masses from the individual channels and the two experiments are found to be consistent among themselves. The combined measured mass of the Higgs boson is mH=125.09±0.21 (stat)±0.11 (syst) GeV.

关键词： HIGGS bosons RESEARCH COLLISIONS (Nuclear physics) ATLAS (computer program language) REST mass (Relativity) BOSONS

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Detection of B-Mode Polarization in the Cosmic Microwave Background with Data from the South Pole Telescope

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Physical Review Letters 2013年第14期111卷 141301-141301页

作者： D. Hanson S. Hoover A. Crites P. A. R. Ade K. A. Aird J. E. Austermann J. A. Beall A. N. Bender B. A. Benson L. E. Bleem J. J. Bock J. E. Carlstrom C. L. Chang H. C. Chiang H-M. Cho A. Conley T. M. Crawford T. de Haan M. A. Dobbs W. Everett J. Gallicchio J. Gao E. M. George N. W. Halverson N. Harrington J. W. Henning G. C. Hilton G. P. Holder W. L. Holzapfel J. D. Hrubes N. Huang J. Hubmayr K. D. Irwin R. Keisler L. Knox A. T. Lee E. Leitch D. Li C. Liang D. Luong-Van G. Marsden J. J. McMahon J. Mehl S. S. Meyer L. Mocanu T. E. Montroy T. Natoli J. P. Nibarger V. Novosad S. Padin C. Pryke C. L. Reichardt J. E. Ruhl B. R. Saliwanchik J. T. Sayre K. K. Schaffer B. Schulz G. Smecher A. A. Stark K. T. Story C. Tucker K. Vanderlinde J. D. Vieira M. P. Viero G. Wang V. Yefremenko O. Zahn M. Zemcov Department of Physics McGill University Montreal Quebec H3A 2T8 Canada Kavli Institute for Cosmological Physics University of Chicago Chicago Illinois 60637 USA Enrico Fermi Institute University of Chicago Chicago Illinois 60637 USA Department of Astronomy and Astrophysics University of Chicago Chicago Illinois 60637 USA School of Physics and Astronomy Cardiff University Cardiff CF24 3YB United Kingdom University of Chicago Chicago Illinois 60637 USA Department of Astrophysical and Planetary Sciences CASA University of Colorado 389 UCB Boulder Colorado 80309 USA National Institute of Standards and Technology Boulder Colorado 80305 USA Department of Physics University of Chicago Chicago Illinois 60637 USA California Institute of Technology Pasadena California 91125 USA Jet Propulsion Laboratory Pasadena California 91109 USA High Energy Physics Division Argonne National Laboratory Argonne Illinois 60439 USA School of Mathematics Statistics and Computer Science University of KwaZulu-Natal Durban 4000 South Africa Department of Physics University of California Berkeley California 94720 USA Department of Physics University of Colorado Boulder Colorado 80309 USA Department of Physics University of California Davis California 95616 USA Physics Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics and Astronomy University of British Columbia Vancouver British Columbia V6T 1Z1 Canada Department of Physics University of Michigan Ann Arbor Michigan 48109 USA Physics Department Case Western Reserve University Cleveland Ohio 44106 USA Materials Science Division Argonne National Laboratory Argonne Illinois 60439 USA Department of Physics University of Minnesota Minneapolis Minnesota 55455 USA Liberal Arts Department School of the Art Institute of Chicago Chicago Illinois 60603 USA Infrared Processing and Analysis Center California Institute of Technology JPL Pasadena California 91125 USA Ha

Gravitational lensing of the cosmic microwave background generates a curl pattern in the observed polarization. This “B-mode” signal provides a measure of the projected mass distribution over the entire observable Universe and also acts as a contaminant for the measurement of primordial gravity-wave signals. In this Letter we present the first detection of gravitational lensing B modes, using first-season data from the polarization-sensitive receiver on the South Pole Telescope (SPTpol). We construct a template for the lensing B-mode signal by combining E-mode polarization measured by SPTpol with estimates of the lensing potential from a Herschel-SPIRE map of the cosmic infrared background. We compare this template to the B modes measured directly by SPTpol, finding a nonzero correlation at 7.7σ significance. The correlation has an amplitude and scale dependence consistent with theoretical expectations, is robust with respect to analysis choices, and constitutes the first measurement of a powerful cosmological observable.

关键词： POLARIZATION (Nuclear physics) RESEARCH COSMIC background radiation GRAVITATIONAL lenses COSMOLOGY

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