Effect of thermo-mechanical treatment on microstructure and mechanical properties of P92 heat resistant steel

Li, Shengzhi; Eliniyaz, Zumrat; Sun, Feng; Shen, Yinzhong; Zhang, Lanting; Shan, Aidang

doi:10.1016/j.msea.2012.09.040

Cited by 50 publications

(15 citation statements)

References 29 publications

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“…After the specimens are normalized at 980 and 1050 °C, most precipitates are rod‐like carbides distributed along martensite laths and spheroidal carbides distributed inside the grains. Both are confirmed to be Cr‐rich M 23 C 6 carbides by SAED method (as shown in Figure e) and EDS analysis (Figure f), which is in agreement with the previous studies . It is confirmed to be [012] crystal zone axis of FCC structure.…”

Section: Resultssupporting

confidence: 90%

Effect of Normalizing Temperature on Microstructure and Mechanical Properties of 11Cr–3Co–2.3W Steel

Cui

Gao

Cheng-lin

et al. 2019

steel research int.

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Mechanical properties of 11Cr–3Co–2.3W steel are affected by various parameters, and normalizing temperature is an important parameter. OM, FESEM, EBSD, and TEM are carried out to study the microstructure evolution of 11Cr–3Co–2.3W steel normalized at different temperature ranging from 900 °C to 1150 °C and tempered at 780 °C. The tensile and impact properties are evaluated from the tempered specimens. The results show that an obvious grain coarsening occurs and the tempered strength of 11Cr–3Co–2.3W steel increases with increasing normalizing temperature. The specific strengthening mechanisms are discussed. The fracture morphology shows mainly dimples and cleavage facets, implying mixed‐mode of fracture mechanism when the normalizing temperature is up to 1050 °C. Normalizing at 1150 °C, the mixed‐mode of fracture mechanism is transformed to brittle fracture.

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Section: Resultssupporting

confidence: 90%

Effect of Normalizing Temperature on Microstructure and Mechanical Properties of 11Cr–3Co–2.3W Steel

Cui

Gao

Cheng-lin

et al. 2019

steel research int.

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“…However, the subgrain structure formation increased with increase in tempering temperature up to 1033 K; further increase in tempering temperature did not make any significant increase in the subgrains formation. This is due to the recovery taking place which resulted in decreased dislocation density [16] to its maximum up to 1033 K.…”

Section: Microstructurementioning

confidence: 99%

Effect of normalizing and tempering temperatures on microstructure and mechanical properties of P92 steel

Barbadikar

Deshmukh

Maddi

et al. 2015

International Journal of Pressure Vessels and Piping

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“…[22][23][24][25] The TMT process has not been extensively investigated in 9Cr steels, and most of the work has only described the enhancement of fine MX precipitation and does not compare martensitic microstructures. [15,16,26,27] Figure 3 shows the EBSD patterns of the as-processed (a through c) and the as-tempered (d through f) microstructures. The images confirm typical martensitic microstructures as seen the optical micrographs above.…”

Section: B Martensitic Microstructure After Tmt and Pre-weld Temperingmentioning

confidence: 99%

Toward Improving the Type IV Cracking Resistance in Cr-Mo Steel Weld Through Thermo-Mechanical Processing

Shassere

Yamamoto

Babu

2016

Metall Mater Trans A

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Detailed microstructure characterization of Grade 91 (Modified 9Cr-1Mo, ASTM A387) steel subjected to a thermo-mechanical treatment process was performed to rationalize the cross-weld creep properties. A series of thermo-mechanical processing in the austenite phase region, followed by isothermal aging at temperatures at 973 K to 1173 K (700°C to 900°C), was applied to the Grade 91 steel to promote precipitation kinetics of MX (M: Nb and V, X: C and N) in the austenite matrix. Detailed characterization of the base metals after standard tempering confirmed the presence of fine MX dispersion within the tempered martensitic microstructure in steels processed at/and above 1073 K (800°C). Relatively low volume fraction of M 23 C 6 precipitates was observed after processing at 1073 K (800°C). The cross-weld creep strength after processing was increased with respect to the increase of MX dispersion, indicating that these MX precipitates maintained during weld thermal cycles in the fine-grained heat-affected zone region and thereby contribute to improved creep resistant of welds in comparison to the welds made with the standard ''normalization and tempering'' processes. The steels processed in this specific processing condition showed improved cross-weld creep resistance and sufficient room temperature toughness. The above data are also analyzed based on existing theories of creep deformation based on dislocation climb mechanism.

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Effect of thermo-mechanical treatment on microstructure and mechanical properties of P92 heat resistant steel

Cited by 50 publications

References 29 publications

Effect of Normalizing Temperature on Microstructure and Mechanical Properties of 11Cr–3Co–2.3W Steel

Effect of Normalizing Temperature on Microstructure and Mechanical Properties of 11Cr–3Co–2.3W Steel

Effect of normalizing and tempering temperatures on microstructure and mechanical properties of P92 steel

Toward Improving the Type IV Cracking Resistance in Cr-Mo Steel Weld Through Thermo-Mechanical Processing

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