Now showing items 1-10 of 98
Fatigue apparatus for geometrically complex non-standardized specimens
(Recent Patents on Mechanical Engineering, 2009-01-01) [Artigo]
Standard Test Methods (e.g. ASTM, DIN) for materials characterization in general, and for fatigue in particular, do not contemplate specimens with complex geometries, as well as the combination of axial and in-plane bending ...
Qualitative and quantitative characterization of aluminium alloys after corrosion testing
(Praktische Metallographie = Practical Metallography, 2001-06-01) [Artigo]
The 2024 and 7050 aluminium alloys used as aircraft components were subjected to laboratory corrosion tests in sodium chloride solution, Light-microscope examinations make it possible to characterise morphological aspects ...
A metallurgical study of aluminium alloys used as aircraft components
(Praktische Metallographie = Practical Metallography, 2001-02-01) [Artigo]
The effects of heat treatment on morphologies and microstructures of Al 2024 and Al 7050 alloys, used as aircraft components, were studied by metallographic techniques. Light microscopy (LM) and quantitative image analysis ...
Residual stress influence on fatigue lifetimes of electroplated AISI 4340 high strength steel
(Fatigue & Fracture of Engineering Materials & Structures, 2007-11-01) [Artigo]
Residual stresses play an important role in the fatigue lives of structural engineering components. In the case of near surface tensile residual stresses, the initiation and propagation phases of fatigue process are ...
Digital Light Microscopy of Macroporous Ceramics Processed by Consolidation Casting with Mixtures of Native Starches
(Praktische Metallographie = Practical Metallography, 2008-12-01) [Artigo]
Porosity in starch consolidation casting technique is rightly related to original size and morphology of starch granules, leaving a pore structure after burning out. This work reports the results for the addition of different ...
Determination of the volume fraction of retained austenite in a 300m steel by heat tinting technique
(SAE Technical Papers, 2007-12-01) [Trabalho apresentado em evento]
Applying the Heat Tinting Technique the microestrutural characterization of a 300M steel (medium carbon steel) was accomplished. The steel was austenitized for 20 min to 900°C, followed by holding at 400°C (in the bainitic ...
The significance and determination by image analysis of microcrack density in hard chromium plating
(Plating and Surface Finishing, 2008-04-01) [Artigo]
It is well known that the microcrack density is a fundamental parameter in hard chromium electroplating. The chemical and mechanical properties of this coating are widely dependent on its microcrack density. In this paper ...
Projetos e práticas de formação de professores: relatos
(Coleção PROGRAD (UNESP), 2007) [Trabalho apresentado em evento]
(Congresso de Extensão Universitária, 2001) [Resumo]
Promover Orientação Profissional é refletir sobre a tarefa ideológica de formar sujeitos com identidade e não modelados pela adaptação a um sistema já pré-determinado. Proporcionar orientação profissional na adolescência, ...
Fractal analysis along stretch zone for an aluminum alloy
(Materials Letters, 2005-03-01) [Artigo]
The topography of fracture surface along stretch zone front for Al7050 is analyzed about its fractal behavior and compared against local distributions of microstructural parameters and stretch zone height, considered here ...