Martensite Aging
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. 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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2. Influence of Microstructure on the Corrosion Resistance of AISI 317L (UNS S31703)
The AISI 317L stainless steel is an austenitic grade with at least 3%Mo. Recently, this steel has replaced AISI 316L in many applications in chemical and petrochemical industries, due to its higher pitting corrosion resistance. The microstructure of the hot rolled and annealed material studied in this work consists of austenitic grains and 4.0% of delta ferr
Mat. Res.. Publicado em: 15/05/2017
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3. Efeito das adições de tratamentos criogênicos e de alívio de tensões no ciclo térmico do aço ferramenta AISI D2. / The effect of cryogenic and stress relief treatments additions in the thermal cycle of the AISI D2 tool steel.
Foram estudados os efeitos da introdução de etapas de tratamento criogênico e do alívio de tensões no ciclo térmico do aço ferramenta para trabalho a frio AISI D2. Variaram-se as temperaturas de tratamento criogênico, sendo elas principalmente: criogênica (-196°C) e subzero (-80°C). Foram variados os tempos de permanência às temperaturas criogê
Publicado em: 2011
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4. Cinética de envelhecimento de aços dual phase de baixa resistência mecânica laminados a frio
The kinetics of static strain aging in cold rolled Dual Phase steels of the 250/450 MPa grade of mechanical strength was studied by means of tensile tests. Two Dual Phase steels, with and without a chromium addition of 0.36wt%, were studied in a pilot scale. After the continuous annealing step, carried out in a Gleeble machine model 3500, the specimens were
Publicado em: 2009
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5. Correlação entre transformações de fases e comportamento mecanico de ligas Ti-Nb-Sn e sua aplicação na concepção de implantes ortopedicos com propriedades otimizadas / Correlation between phase transformations and mechanical behavior of Ti-Nb-Sn alloys and its applications in the design of orthopedic implants with optimized characteristics
β type Ti alloys exhibit versatility in terms of mechanical properties, which can be tailored by using specific heat treatment conditions. In this work, Ti-Nb-Sn alloy samples were prepared, processed and characterized, aiming to produce femoral stems of total hip prostheses. The research included evaluations of phase transformations during heat treatme
Publicado em: 2009
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6. InfluÃncia do Resfriamento sub-zero apÃs o Envelhecimento na FormaÃÃo de Austenita Revertida em um AÃo Maraging 350 / Influence of sub-zero cooling after the formation of austenite on Aging Reversed in a maraging steel 350
Maraging steels are materials of ultra high strength mainly composed of a base quaternary Ni-Co-Mo-Ti which have excellent toughness combined with high mechanical strength being used in war industry, nuclear, aircraft components, pressure vessels up to the sports industry . One of its important applications is in use in hysteresis motors which require materi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2008
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7. Mechanical properties and corrosion resistance of the Ti-35Nb alloys applied as biomaterial / Propriedades mecanicas e de resistencia a corrosão de ligas Ti-35Nb a serem aplicadas como biomaterial
Titanium alloys form the most versatile class of metallic materials used as biomaterials. Among them, one finds the ß ?type alloy, which must soon become the standard metallic materials for orthopedic applications. The aim of this work is to prepare and characterize a type ß ?titanium alloy containing 35 wt.% Nb. Samples of such alloy were rapidly and slow
Publicado em: 2008
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8. Caracterização microestrutural e mecânica de aços resisitentes ao fogo a base de MO-Si-P
Cracking problems during continuous casting of USI SAC structural steels produced by USIMINAS has led to development of a new steel design based on the substitution of Si and P for this former alloy base (Cr and Cu). The new design reduced significantly production costs associated with slab scarfing, without altering the original mechanical and physical char
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/09/2004