The effect of alloying elements and microstructure on the strength and fracture resistance of pearlitic steel

Nakase, Kazuo; Bernstein, I. M.

doi:10.1007/bf02645816

Cited by 37 publications

(30 citation statements)

References 3 publications

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“…The alloying elements also affect the yield strength by solid solution strengthening. In Figure 9, published data on yield strength and interlamellar spacing of pearlitic eutectoid steels containing silicon, 0.81C-0.87Mn-0.17Si (wt pct) [8] and 0.77C-0.72Mn-0.33Si (wt pct), [9] are compared with the present work. The method used to determine the interlamellar spacing in these data and in the present work is the same.…”

Section: Mechanical Propertymentioning

confidence: 93%

“…[7][8][9][10]33] A decrease in pearlite colony size also increases the yield strength; however, the effect is relatively small. [8,9] In the present study, the addition of aluminum decreased the interlamellar spacing and colony size (Table II); thereby, the increase in yield strength with aluminum content is consistent with the literature. The alloying elements also affect the yield strength by solid solution strengthening.…”

Section: Mechanical Propertymentioning

confidence: 99%

“…interlamellar spacing, nodule size, colony size, and cementite width, decide the strength and ductility of hypereutectoid steels. [7][8][9][10][11] The alloying additions used for grain boundary cementite control may affect these features. The interlamellar spacing is reduced by alloying with silicon [12] but remains unchanged with cobalt additions.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aluminum Content on the Microstructure and Mechanical Properties of Hypereutectoid Steels

Jang

Phaniraj

Kim

et al. 2010

Metall Mater Trans A

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Hypereutectoid steels with 0, 0.69, 1.29, and 1.95 wt pct aluminum were prepared. The samples were hot rolled at 1100°C followed by cooling in air. The microstructure of the as-rolled samples was characterized using field emission-scanning electron microscopy (FE-SEM). The electron backscattered diffraction (EBSD) technique was used to identify the grain boundary phases. The steels have a pearlitic microstructure with different amounts of grain boundary cementite. A continuous grain boundary cementite network is present in the 0 wt pct Al steel. Grain boundary cementite formation is completely suppressed in the 1.29 wt pct Al steel. Phase diagram calculations show that aluminum increases the eutectoid temperature. However, the interlamellar spacing and pearlite colony size decrease with increase in aluminum content. Dilatometry measurements show that aluminum addition increases the undercooling below the eutectoid temperature. The yield strength increases with the decrease in interlamellar spacing and colony size. Very high ultimate tensile strengths (1200 to 1400 MPa) and improved elongations to failure (7 to 9 pct) are achieved in the as-rolled condition.

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Section: Mechanical Propertymentioning

confidence: 93%

Section: Mechanical Propertymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Aluminum Content on the Microstructure and Mechanical Properties of Hypereutectoid Steels

Jang

Phaniraj

Kim

et al. 2010

Metall Mater Trans A

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“…It is generally recognized in ductile materials that voids or microcracks with a size in micrometers, initiate and grow through thinning by multiple slip, and link with the main crack, resulting in a zigzag crack propagation [1–3 ]. It was found, in 310 stainless steel, that a nanocrack nucleated in the dislocation‐free zone (DFZ) ahead of the main crack tip [4 ].…”

Section: Introductionmentioning

confidence: 99%

Nucleation, Blunting or Propagation of a Nanocrack in Dislocation‐free Zones of Thin Crystals

Chen

Chu

Gao

et al. 1998

Fatigue Fract Eng Mat Struct

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Nucleation, blunting and propagation of nanocracks in dislocation‐free zones (DFZs) ahead of crack tips in ductile and brittle metals have been investigated by tensioning in situ with a TEM, and analysed using microfracture mechanics. The results show that in either ductile or brittle metals, many dislocations could be emitted from a loaded crack tip and a DFZ formed after equilibrium. The stress in the DFZ may be up to the cohesive strength of the material, and then a nanocrack is initiated in the DFZ or directly from the crack tip. In ductile metals, the nanocrack is blunted into a void or notch during constant displacement. In brittle metals, the nanocrack propagated as a cleavage microcrack rather than being blunted.

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“…Recozido (0 J/mol) VI NaCl 2g/l -0,662 1,29.10 -5 Temperado (2249 J/mol) VI NaCl 2g/l -0,403 0,96.10 -5 Temperado e revenido (6 J/mol) VI NaCl 2g/l -0,563 1,07. HONEYCOMBE, 2006;LIU et al, 2016;NAKASE;BERNSTEIN, 1988;MEI, 2010]. 628,47 ± 3,63 759,53 ± 4,20 826,44 ± 113,93 857,22 ± 80,56 628,27 ± 5,27 674,92 ± 15,60 E (GPa)…”

Section: E (Gpa)unclassified

Influência do tratamento de normalização nas propriedades mecânicas e de corrosão nos aços AISI 52100 e AISI 52100 modificado ao Si e Mn

Silva¹

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O aço SAE AISI 52100 com microestrutura martensítica revenida é utilizado para a fabricação de rolamentos como também na fabricação de outras peças e dispositivos para aplicações marinhas. A modificação deste aço com a adição de silício e manganês pode melhorar as propriedades mecânicas em média-alta temperatura. Este aço modificado ao Si e Mn apresenta grande resistência ao amolecimento durante o revenimento, o que pode ser explorado quanto ao comportamento em altas temperaturas. Para a realização deste trabalho, foi utilizado o aço AISI 52100 com composição química conforme estabelece a norma ASTM A295-2014, e um aço experimental com 1,82% de Si e 1% de Mn baseado no aço AISI 52100. Após tratamento térmico de normalização, investigou-se os fenômenos de transformação de fase por meio de estudos microestruturais, mecânicos e corrosivos em diferentes temperaturas. A adição de Si e Mn junto ao tratamento de normalização conferiram melhor dureza, tenacidade ao impacto e maior resistência à tração a 25, 300 e 400 o C, porém diminuiu a resistência à corrosão comparada à do aço AISI 52100 na condição utilizada nas indústrias. Portanto, o aço modificado normalizado se mostrou adequado para utilização em maiores temperaturas que não exijam resistência à corrosão em solução de NaCl 3,5 %p. Palavras-chave: Aço 52100 modificado ao Si e Mn. Transformações de fases. Caracterização mecânica. Caracterização microestrutural. Resistência à corrosão.

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The effect of alloying elements and microstructure on the strength and fracture resistance of pearlitic steel

Cited by 37 publications

References 3 publications

Effect of Aluminum Content on the Microstructure and Mechanical Properties of Hypereutectoid Steels

Effect of Aluminum Content on the Microstructure and Mechanical Properties of Hypereutectoid Steels

Nucleation, Blunting or Propagation of a Nanocrack in Dislocation‐free Zones of Thin Crystals

Influência do tratamento de normalização nas propriedades mecânicas e de corrosão nos aços AISI 52100 e AISI 52100 modificado ao Si e Mn

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