Heat And Strength Resistance
Mostrando 1-12 de 67 artigos, teses e dissertações.
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1. Stabilized mortar with air incorporator agent and plasticizer set retarder: performance measurement
Resumo Este estudo tem como objetivo desenvolver três argamassas estabilizadas para alvenaria com aditivo incorporador de ar e plastificante retardador de pega para comparar com uma argamassa convencional com cal. Foi analisado o índice de consistência, a massa específica, o teor de ar incorporado, a retenção da água, o tempo de pega através do calor
Rev. IBRACON Estrut. Mater.. Publicado em: 13/12/2019
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2. Phase Separation and Development of the Microstructure for Stainless Steel to Copper Alloy Weld Joints Using a Fiber Laser
ABSTRACT Stainless steel and copper alloys joints are often applied in aerospace, marine and power industries where both high thermal and electrical conductivity (Cu) and corrosion resistance (steel) are required. In the aerospace industry, in particular for the combustion chamber of rocket engines, copper and steel combinations offer perfect materials selec
J. Aerosp. Technol. Manag.. Publicado em: 10/10/2019
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3. The influence of Cu content on high temperature corrosion behavior of heat - resistant molten salt steel
ABSTRACT This work studies the high temperature corrosion behavior of new heat-resistant steel with salt coating method of 75%Na2SO4+25%NaCl coating on the steel surface at 700ºC. The chemical composition of corrosion products and surface morphology of the corrosion layer were analyzed using X-ray diffractometer (XRD), scanning electron microscopy (SEM), en
Matéria (Rio J.). Publicado em: 16/09/2019
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4. Efeito do metal de adição na resistência ao desgaste por deslizamento de um aço estrutural soldado por GMAW
RESUMO O objetivo do presente trabalho foi avaliar o efeito do metal de adição na soldagem, e das microestruturas resultantes, na resistência ao desgaste de juntas soldadas de um aço estrutural ASTM A242, que possui resistência à corrosão atmosférica e é utilizado na fabricação de vagões destinados ao transporte de minério. As amostras foram sol
Matéria (Rio J.). Publicado em: 16/09/2019
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5. Influência do uso de cinza volante na elevação adiabática de temperatura e resistência à compressão de concretos
RESUMO A construção de grandes edifícios tem requerido a execução de blocos de fundação de grandes dimensões, com volumes que chegam a milhares de m3 de concreto. Em geral, estas estruturas são executadas em concretos autoadensáveis e/ou de altas resistências, resultando em elevados consumos de aglomerante. Nesses casos, o emprego de cinza volante
Matéria (Rio J.). Publicado em: 10/06/2019
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6. Efeito da Taxa de Resfriamento na Liga Ni80Cu20 via Dinâmica Molecular
RESUMO A simulação em Dinâmica Molecular (MD) é uma poderosa ferramenta para estudo de ligas amorfas nanométricas. Neste artigo, a MD foi empregada para o estudo da liga Ni80Cu20. As simulações foram realizadas com o código livre LAMMPS, em um sistema contendo 2.000 átomos com interação atômica dada pelo potencial de Finnis-Sinclair (EAM-FS). O a
Matéria (Rio J.). Publicado em: 20/05/2019
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7. Influence of Processing Variables on Clay-Based Ceramic Formulations
The properties of ceramic materials and microstructural changes are dependent on the raw materials from which they are made and on the manner in which they are processed, from the composition to the established thermal treatment, heating rate, and firing temperature. In this study, the influence of some processing parameters (formulation, maturation time, an
Mat. Res.. Publicado em: 11/03/2019
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8. Intercritical Heat Treatment Temperature Dependence of Mechanical Properties and Corrosion Resistance of Dual Phase Steel
Abstract This study investigated the effect of intercritical heat treatment temperature on the tensile properties, work hardening and corrosion resistance of dual phase steel. Ferrite-martensite dual phase steel with different martensite volume fractions were obtained after heat treatment at different intercritical temperatures. Microstructure, mechanical pr
Mat. Res.. Publicado em: 17/01/2019
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9. Development of metakaolin and geopolymer proppants with nanocarbon materials
Abstract From the first hydraulic fracturing in the 40’s until nowadays, the techniques of each process step have evolved significantly. This study presents a new approach on the development of metakaolin (MK) and geopolymer based proppant with and without nanocarbon materials such as multi-walled carbon nanotubes and graphene oxide. For manufacturing the
Cerâmica. Publicado em: 2019-01
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10. Effect of Aging Heat Treatment H950 and H1000 on Mechanical and Pitting Corrosion Properties of UNS S46500 Stainless Steel
The effect of aging temperature on mechanical and pitting corrosion properties of UNS S46500 was investigated. Tensile and Hardness tests were carried out and the microstructure was analyzed by optical microscopy, scanning electron microscopy and X-ray diffraction; Thermo-Calc simulations helped in the phase identification. Pitting corrosion properties were
Mat. Res.. Publicado em: 08/11/2018
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11. Influence of High Current-Density Impulses on the Stress-Strain Response and Microstructural Evolution of the Single Crystal Superalloy CMSX-4
Owing to the low formability of single-crystal nickel-based materials, single-crystal components are typically cast. Subsequently, a multi-stage heat treatment is carried out in order to partially compensate the dendrite segregation and to stabilize the precipitated γ’-phase. Such components possess a high resistance to creep at elevated temperatures. Sin
Mat. Res.. Publicado em: 22/10/2018
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12. Efecto del tratamiento térmico sobre la resistencia mecánica, corrosión intergranular y exfoliación de la aleación de aluminio 7075
ABSTRACT In this study, the effects of heat treatments in the peak aged (T6), overaged (T73) and retrogression and reaging (RRA, retrogression at 200 °C for 10 min) on the microstructure, mechanical strength, exfoliation corrosion and intergranular corrosion of aluminum alloy 7075, has been investigated by optical microscope, scanning electron microscopy, t
Matéria (Rio J.). Publicado em: 19/07/2018