Precipitation Hardening
Mostrando 13-18 de 18 artigos, teses e dissertações.
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13. Influência da cal hidratada nas idades iniciais da hidratação do cimento Portland - estudo em pasta. / Influence of hydrated lime on initial stages of hydration of Portland cement - paste study.
In the last decades, scientific and technological progress has shown a significant advance in the process of obtaining lime; however, there is gap knowledge with relation to its action when employed together with Portland cement. The use of lime in finishing mix mortars has only been positively associated to the fresh state plasticity and ability to deformat
Publicado em: 2008
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14. Age-hardening of Ti-35Nb-7Zr-5Ta alloy for orthopaedic implants
Bone injuries and failures often require the inception of implant biomaterial. Research in this field has received increasing attention recently. In particular, porous metals are attractive due to its unique physical, mechanical, and new bone tissue ingrowth properties. The aim of this work is to investigate age hardening behavior of Ti-35Nb-7Zr-5Ta alloy pr
Materials Research. Publicado em: 2007-09
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15. Analise do processamento termomecanico de placas finas de aço microligado V-Nb com enfase na precipitação de carbonitretos
The seeking for new technologies that aim costs reduction and quality and productivity improvement has pushed the steelmakers to develop the near-net shape casting processes. In this work it will be showed the results of the thin slabs solidification, one of these technologies, using the Thin Slabs Casting Simulator (TSCS) of the Materiais Engineering Depart
Publicado em: 2004
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16. Microstructure and mechanical properties of a microalloyed steel after thermal treatments
The properties of a microalloyed steel, with Nb and V in its composition, were studied, after different intercritical thermal treatments and at different austenitizing and tempering temperatures. The mechanical properties of the specimens were measured in a Vickers hardness tester, and their microstructures were analyzed by optical microscopy, with the aid o
Materials Research. Publicado em: 2003-06
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17. MICROESTRUCTURAL STABILITY OF AL - 2.4 LI - 1.2 CU - 0.6 MG - 1.12 ZR ALLOY (8090) SUBJECTED TO REGRESSION AND REAGING TREATMENTS / ESTABILIDADE MICROESTRUTURAL DA LIGA AL - 2,4 LI - 1,2 CU - 0,6 MG - 0,12 ZR (8090) SUBMETIDA A TRATAMENTOS DE RETROGRESSÃO E REENVELHECIMENTO
O objetivo deste trabalho é avaliar a estabilidade microestrutural da liga 8090 (Al-Li-Cu-Mg-Zr) submetida a tratamentos térmicos de retrogressão e reenvelhecimento em diferentes condições de tempo e temperatura. Caracterização da morfologia e da estabilidade das fases endurecedoras foi realizada por microscopia eletrônica de varredura (MEV), utiliza
Publicado em: 2003
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18. Recristalização das ligas supercondutoras do sistema Nb-Ti
Multifilamentary cables of Nb-Ti alloys have been used mainly in superconducting engines and devices. These alloys have high ductility and their final most important superconducting properties can be established by suitable metallurgical procedures. In this work the influence of the microstructural characteristics on the superconducting properties and of the
Publicado em: 1986