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Effect of heat treatment on the microstructure and mechanical properties of a low-carbon X80 pipeline steel Cover

Effect of heat treatment on the microstructure and mechanical properties of a low-carbon X80 pipeline steel

Materials Science-Poland
Volume 39 (2021): Issue 1 (March 2021)
By: B.C. Acosta-Cinciri,  N.M. López-Granados,  J.A. Ramos-Banderas,  C.A. Hernández-Bocanegra,  P. Garnica-González and  J.A. López-Corpus  
Open Access
|Jul 2021

Figures & Tables

Fig. 1

Schematic diagram of the heat treatments performed on steel. TT, thermal treatment.
Schematic diagram of the heat treatments performed on steel. TT, thermal treatment.

Fig. 2

CCT diagram of the steel studied, calculated by means of the JMat-Pro® program. ρ = pearlite, β = bainita. CCT, continuous cooling transformation.
CCT diagram of the steel studied, calculated by means of the JMat-Pro® program. ρ = pearlite, β = bainita. CCT, continuous cooling transformation.

Fig. 3

Dilatometry curves obtained for thermal treatments made in RITA. (A) TT1, (B) TT2, (C) TT3, (D) TT4, and (E) TT5. RITA, rapid induction thermal analysis.
Dilatometry curves obtained for thermal treatments made in RITA. (A) TT1, (B) TT2, (C) TT3, (D) TT4, and (E) TT5. RITA, rapid induction thermal analysis.

Fig. 4

Photomicrographs obtained by SEM. (A) Untreated steel, (B) TT1, (C) TT2, (D) TT3, (E) TT4, and (F) TT5. F, ferrite M; martensite; MA, martensite/austenite; P, pearlite,; SEM, scanning electron microscopy; TT, thermal treatment.
Photomicrographs obtained by SEM. (A) Untreated steel, (B) TT1, (C) TT2, (D) TT3, (E) TT4, and (F) TT5. F, ferrite M; martensite; MA, martensite/austenite; P, pearlite,; SEM, scanning electron microscopy; TT, thermal treatment.

Fig. 5

IQ quality index maps (left) and distribution curves obtained by statistical separation (right) for heat-treated steel: (A) TT1, (B) TT2, (C) TT3, (D) TT4, and (E) TT5. IQ, image quality; TT, thermal treatment.
IQ quality index maps (left) and distribution curves obtained by statistical separation (right) for heat-treated steel: (A) TT1, (B) TT2, (C) TT3, (D) TT4, and (E) TT5. IQ, image quality; TT, thermal treatment.

Fig. 6

Averaged stress vs. strain curves obtained for heat-treated steel samples. TT, thermal treatment.
Averaged stress vs. strain curves obtained for heat-treated steel samples. TT, thermal treatment.

Fig. 7

Effect of heat treatment on mechanical properties and its relationship with the percentage of martensite. TT, thermal treatment; UTS, ultimate tensile strength; YS, yield strength.
Effect of heat treatment on mechanical properties and its relationship with the percentage of martensite. TT, thermal treatment; UTS, ultimate tensile strength; YS, yield strength.

Chemical composition, % wt_

CMnPSiCuCrNiMoVNbTi
0.021.6210.00970.3320.0260.290.290.0140.0360.0860.024
DOI: https://doi.org/10.2478/msp-2021-0012 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 103 - 112
Submitted on: Feb 23, 2021
Accepted on: May 8, 2021
Published on: Jul 9, 2021
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
X80 steel,
microstructure,
mechanical properties,
IQ,
EBSD
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2021 B.C. Acosta-Cinciri, N.M. López-Granados, J.A. Ramos-Banderas, C.A. Hernández-Bocanegra, P. Garnica-González, J.A. López-Corpus, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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