Stainless steels

Llewellyn, David T.

doi:10.1016/b978-075063757-2/50004-4

Cited by 37 publications

(49 citation statements)

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“…The grain structure variation with deformation temperature observed here corresponds to the welldocumented dependences studied earlier. [28] No significant variation with TMP schedule was observed for the second phase (pearlite) content, which can be attributed to the similarity in cooling rates in the temperature range of austenite-to-ferrite transformation (between A r3 and A r1 ). However, the measured amount of second phase (4.2 to 5.3 pct) is almost 2 times lower than the value which might be expected (8 pct) from the lever rule for the carbon content in the studied steel composition.…”

Section: A Effect Of Tmp On Microstructurementioning

confidence: 98%

Strengthening Mechanisms in Thermomechanically Processed NbTi-Microalloyed Steel

Kostryzhev

Marenych

Killmore³

et al. 2015

Metall Mater Trans A

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The effect of deformation temperature on microstructure and mechanical properties was investigated for thermomechanically processed NbTi-microalloyed steel with ferrite-pearlite microstructure. With a decrease in the finish deformation temperature at 1348 K to 1098 K (1075 °C to 825 °C) temperature range, the ambient temperature yield stress did not vary significantly, work hardening rate decreased, ultimate tensile strength decreased, and elongation to failure increased. These variations in mechanical properties were correlated to the variations in microstructural parameters (such as ferrite grain size, solid solution concentrations, precipitate number density and dislocation density). Calculations based on the measured microstructural parameters suggested the grain refinement, solid solution strengthening, precipitation strengthening, and work hardening contributed up to 32 pct, up to 48 pct, up to 25 pct, and less than 3 pct to the yield stress, respectively. With a decrease in the finish deformation temperature, both the grain size strengthening and solid solution strengthening increased, the precipitation strengthening decreased, and the work hardening contribution did not vary significantly. The effect of deformation temperature on microstructure and mechanical properties was investigated for thermomechanically processed NbTi-microalloyed steel with ferrite-pearlite microstructure. With a decrease in the finish deformation temperature at 1348 K to 1098 K (1075°C to 825°C) temperature range, the ambient temperature yield stress did not vary significantly, work hardening rate decreased, ultimate tensile strength decreased, and elongation to failure increased. These variations in mechanical properties were correlated to the variations in microstructural parameters (such as ferrite grain size, solid solution concentrations, precipitate number density and dislocation density). Calculations based on the measured microstructural parameters suggested the grain refinement, solid solution strengthening, precipitation strengthening, and work hardening contributed up to 32 pct, up to 48 pct, up to 25 pct, and less than 3 pct to the yield stress, respectively. With a decrease in the finish deformation temperature, both the grain size strengthening and solid solution strengthening increased, the precipitation strengthening decreased, and the work hardening contribution did not vary significantly.

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Section: A Effect Of Tmp On Microstructurementioning

confidence: 98%

Strengthening Mechanisms in Thermomechanically Processed NbTi-Microalloyed Steel

Kostryzhev

Marenych

Killmore³

et al. 2015

Metall Mater Trans A

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“…Em paralelo, no final da década de 40, mais precisamente em 1948, foi introduzida a especificação API 5LX, contendo somente o tubo de grau X42 [29,30]. Em 1959 foi construído nos Estados Unidos o primeiro duto utilizando aço HSLA [4] e neste ano, também houve o desenvolvimento do primeiro aço X52 microligado, possuindo baixo teor de carbono e endurecido pela adição de elementos de microliga, tais como: nióbio e vanádio, na ordem de 0,10% [12].…”

Section: Desenvolvimentounclassified

“…Já o X65 e o X70 são obtidos com adição de Nb e V, apresentando microestrutura ferrita+perlita, grãos refinados e baixo teor de carbono [30,34].…”

Section: Desenvolvimentounclassified

“…Neste caso, utiliza-se uma maior quantidade de elementos de liga, tais como níquel e molibdênio nos aços ligados originalmente ao nióbio e vanádio, seguido de um refinado processo de laminação [19,30,39]. Este foi o caminho adotado pela indústria nacional, devido a limitações operacionais.…”

Section: Estágio Atualunclassified

“…A etapa fi nal de laminação é executada em temperatura abaixo da temperatura de recristalização (750 a 700 ºC [4]), na qual seja possível obter grande deformação, formando uma microestrutura de granulação fi na (em forma de grãos alongados ou "panquecas" [30]), que irá proporcionar grande resistência mecânica e tenacidade.…”

Section: Rota De Produçãounclassified

See 2 more Smart Citations

Uma breve revisão histórica do desenvolvimento da soldagem dos aços API para tubulações

Casanova¹,

Rocha²,

Brandi³

2013

Soldag. insp.

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Mechanical properties and corrosion behaviour of developed high nitrogen high manganese stainless steels

Saravanan¹,

Govindaraj

Khalkho³

et al. 2023

Materialwissenschaft Werkst

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Influence of composition, specifically manganese and nitrogen content, on the microstructure associated corrosion resistance property of newly developed stainless steel has been studied. The developed steels have been characterised for their microstructure, mechanical and electrochemical properties.The results indicate that the addition of manganese and nitrogen as a substitute for nickel favours the austenite microstructure, higher yield strength (> 350 MPa), tensile strength (> 700 MPa), elongation and superior Charpy Vnotch impact toughness properties. The results obtained from electrochemical tests such as potentiodynamic polarisation and electrochemical impedance spectroscopy of manganese stainless steel show remarkable improvement (about 4 times) in corrosion resistance exhibiting passivity behaviour like that of commercial stainless steel (316L).

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Stainless steels

Cited by 37 publications

References 1 publication

Strengthening Mechanisms in Thermomechanically Processed NbTi-Microalloyed Steel

Strengthening Mechanisms in Thermomechanically Processed NbTi-Microalloyed Steel

Uma breve revisão histórica do desenvolvimento da soldagem dos aços API para tubulações

Mechanical properties and corrosion behaviour of developed high nitrogen high manganese stainless steels

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