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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.

Fig. 2

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.

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.

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.

Fig. 6

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.

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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