Fracture Of Metals
Mostrando 1-12 de 15 artigos, teses e dissertações.
-
1. Avaliação da resistência de união de uma cerâmica de óxido de zircônia submetida a tratamentos de superfície por abrasão
Resumo Introdução A cimentação adesiva, com cerâmicas puras, é um passo relevante no estabelecimento da longevidade de trabalhos protéticos, sendo estes os melhores materiais utilizados para a reposição de dentes perdidos, de forma a reabilitar o sorriso. O sistema cerâmico de zircônia não se beneficia do tratamento com ácidos e necessita de di
Rev. odontol. UNESP. Publicado em: 12/09/2019
-
2. Effect of Welding Heat Input on the Microstructure and Mechanical Properties of Dissimilar Friction Stir-Welded Copper/Brass Lap Joint
Dissimilar lap welded joints of copper and brass metals were fabricated by friction stir welding (FSW) method at various welding heat inputs. The effect of welding heat inputs on the microstructure and mechanical properties of overlap welded joints at at two different join configurations (i.e. Advancing side and Retreating side joint configurations) was inve
Mat. Res.. Publicado em: 26/08/2019
-
3. Influences of Growth Velocity and Fe Content on Microstructure, Microhardness and Tensile Properties of Directionally Solidified Al-1.9Mn-xFe Ternary Alloys
In this study, influences of growth velocity and composition (Fe content) on the microstructure (rod spacing) and mechanical properties (microhardness, ultimate tensile strength and fracture surface) of Al-Mn-Fe ternary alloys have been investigated. Al-1.9 Mn-xFe (x=0.5, 1.5 and 5 wt. %) were prepared using metals of 99.99% high purity in the vacuum atmosph
Mat. Res.. Publicado em: 11/05/2017
-
4. Fragilização por hidrogênio de parafusos cementados / Hydrogen embrittlement of carburized bolts
The main aim of this work is to investigate the effects on hydrogen embrittlement of bolts due to acid pickling, baking, and strip processes performed during zinc plating. Carburized bolts type "hexagon flange head tapping screws", with 6 mm of diameter and 16 mm of thread length were organized into 39 different groups. Acid pickling was evaluated using volu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2011
-
5. Desenvolvimento de união de multimateriais através de rebitagem por injeção (Injection Clinching Joining) / Development of multimaterial joints through injection clinching joining
Multimaterial structures are currently a technologically attractive field of research. The growing use of polymer composites replacing metals in structures aiming for weight and emission reduction is part of the motivation of this study. The currently used techniques adhesive bonding and mechanical fastening are limited in certain aspects, opening a path for
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2011
-
6. Instrumented Charpy : analysis of the instrumentation and the effect of different metallurgical conditions of an ultra-high strength steel on the dynamic fracture toughness / Charpy instrumentado : analise da instrumentação e da influencia de condições metalurgicas de um aço de ultra-alta resistencia mecanica na tenacidade a fratura dinamica
The classical Charpy test is used since 1900 and it is possible to determine from it the global energy for deformation and fracturing the specimen and this energy is named toughness which is important for selection steels considering ductile-brittle transition temperature. The Instrumented Charpy test is very important because it produces more material param
Publicado em: 2009
-
7. Analise numerica e experimental do cravamento de componentes mecanicos tubulares em haste com ponta esferica / Numerical and experimental analysis of tubular metallic parts indented with spherical punchs
Crimping is a cold metal forming process that presents low costs for use in holding tubular components. The type of crimping analyzed is used in projects of components that transmit rotating motion, such as joining systems of brake pedals. If the joining clearance, in this case, is less than 0,02mm the brake movement will be restrained and may not close the
Publicado em: 2007
-
8. AnÃlise de fadiga em juntas soldadas pelo processo MIG/LASER utilizando o mÃtodo dos elementos finitos / Fatigue Analysis of MIG/Laser Welded Joints with the Finite Element Method
The objective of this work is to deal with the analysis of MIG/Laser welded joints. The analysis method chosen is the Master S-N Curve Method, which is based on fracture mechanics principles and uses finite element results as inputs. This method was chosen due to the fact that it has been adopted by American Society of Mechanical Engineers (ASME) for develop
Publicado em: 2006
-
9. Development, microstructural and mechanical caracterization of SiC ceramics with alumina and rare earth oxides additions / Desenvolvimento, caracterização microestrutural e mecânica de cerâmicas de SiC aditivadas com alumina e óxidos de terras raras
In this work, the mechanical properties are determined at room temperature (hardness and fracture toughness) and high temperatures (compressive creep) of SiC ceramic samples with alumina (Al2O3) and rare earth oxides (REO) additions. The REO is obtained by REC (rare earth concentrate - Nuclemon) calcinations, which contains 76 wt % of yttria (Al2O3). Three c
Publicado em: 2006
-
10. Proposta de um novo ensaio para avaliar a susceptibilidade de metais de solda ao fenomeno de trincas induzidas pelo hidrogenio em diferentes ambientes / Proposal of a new test to evaluate the susceptibility of wel metals to the hydrogen induced
Este trabalho tem como objetivo principal propor um novo ensaio para avaliar a susceptibilidade de metais de solda ao fenômeno de trincas induzidas pelo hidrogênio em diferentes ambientes. O novo ensaio é composto de duas propostas: a primeira consiste em viabilizar a aplicação do teste G-BOP (Gapped Bead-On-Plate) em chapas finas: a espessura do corpo
Publicado em: 2005
-
11. Variaveis de influencia do teste G-BOP / Variables of influence of the G-BOP test
Trinca induzida por hidrogênio é um dos defeitos mais graves que ocorrem em juntas soldadas de diversos aços. Esta falha mecânica ocorre com bastante freqüência na zona afetada pelo calor (ZAC) destes materiais. Com o desenvolvimento de novos aços, o risco da ocorrência de trincamento na ZAC tem se reduzido cada vez mais e passado a ocorrer com mais
Publicado em: 2005
-
12. Construção e testes de máquina de ensaio de torção plástica para levantamento do comportamento plástico de metais
A computerized prototype machine for cold torsion testing has been developed, constructed and tested in the Laboratory of Metal Forming at UDESC (University the State the Santa Catarina) - Joinville. The equipment consists of a horizontal torsion machine, employing an electric motor, a wheel, a horizontal axle and a control and acquisition data system. The g
Publicado em: 2004