Study on the mechanism of heat input on the grain boundary distribution and impact toughness in CGHAZ of X100 pipeline steel from the aspect of variant

Qi, Xiaonan; Huan, Pengcheng; Wang, Xiaonan; Di, Hongshuang; Shen, Xinjun; Sun, Qianqian; Liu, Zhenguang; He, Jingrui

doi:10.1016/j.matchar.2021.111344

Cited by 20 publications

(5 citation statements)

References 30 publications

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“…Many metrics such as the inverse polar figure (IPF), GB map, band contrast (BC) map, and kernel average misorientation (KAM) have been widely used to display the microstructure characteristics. [ 43–45 ] The IPF map shows the texture characteristics, while the GB map shows the distribution of high‐angle grain boundaries (HAGB, >15°) and low‐angle grain boundaries (LAGB, 2°–15°). The BC map indicates the local internal stress.…”

Section: Resultsmentioning

confidence: 99%

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H₂S‐Saturated Solution

Liu

Zhou

Pan

et al. 2022

steel research int.

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The corrosion behavior of low‐alloy steel exposed to saturated H2S solution is systematically studied using electron backscattered diffraction, scanning electron microscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, and electron probe microanalysis. The experimental results suggest that the corrosion rate decreases with prolonged immersion time because more corrosion products are formed on the steel surface. The corrosion products consist of mackinawite, greigite, and molybdenite regardless of the corrosion time. The structure of the corrosion products transforms from a single layer into two layers with increasing corrosion time. The Cr content in the corrosion products is similar to that in the steel substrate. The corrosion products are rich in molybdenum owing to the formation of molybdenite.

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Section: Resultsmentioning

confidence: 99%

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H₂S‐Saturated Solution

Liu

Zhou

Pan

et al. 2022

steel research int.

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“…During the second thermal cycle of CR2 and CR3, there was no phase transition in the matrix, and the corresponding lattice structure remained constant [ 24 ]. Previous research has shown that the two intervals of grain boundary distribution of CGHAZ were concentrated at 1–20° and 45–60° because of the K-S relationship [ 25 ]. The grain boundary distributed in 20–45° is correlated with the inter-critically reheated product.…”

Section: Discussionmentioning

confidence: 99%

Inter-Critically Reheated CGHAZ of Ultra-High-Strength Martensitic Steel with Different Cooling Rates

Liu

Zhou

et al. 2023

Materials

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The mechanical properties of steel’s inter-critically reheated coarse-grained heat-affected zone (ICR CGHAZ) directly affects the service life of machinery equipment. The hardness and toughness of ICR CGHAZ can be optimized simultaneously through tailoring microstructure where cooling rate plays a key role. In this work, the samples with different cooling rates was prepared using thermal simulation. The granite bainite (GB), bainite ferrite (BF) and MA were formed at a 1 °C/s (CR1) cooling rate, while BF and MA were formed at 10 °C/s (CR2) and 30 °C/s (CR3) cooling rates. With the increase of cooling rate, the effective grain size decreased and the number of hard phases increased, resulting in monotonic increase of hardness(260HV3, 298HV3 and 323HV3). CR1 had sparsely distributed coarse slender MA and CR3 possessed tail-head connected MA along PAGBs, which was detrimental to toughness. Therefore, CR2 possessed the best toughness(25J). The microstructural evolution mechanism of ICR CGHAZ with different cooling rates is investigated, corresponding hardening and toughening mechanisms are discussed.

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“…The HKL Channel 5 software was utilized for the data processing and statistical analysis, and prior austenite grains were reconstructed by means of ARPGE software. [ 28,29 ]…”

Section: Methodsmentioning

confidence: 99%

“…The HKL Channel 5 software was utilized for the data processing and statistical analysis, and prior austenite grains were reconstructed by means of ARPGE software. [28,29] 2.4. Hardness and Impact Toughness Test Vickers hardness measurements were performed according to ASTM E92-82 standard.…”

Section: Metallography Analysismentioning

confidence: 99%

Simulated Coarse Grain Heat‐Affected Zone Transformation Behavior of Newly Developed Zr–Ti–RE Deoxidized High‐Strength Low‐Alloy Steels with Extremely High Impact Toughness

Yin

Cheng

et al. 2023

steel research int.

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Study on the mechanism of heat input on the grain boundary distribution and impact toughness in CGHAZ of X100 pipeline steel from the aspect of variant

Cited by 20 publications

References 30 publications

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H₂S‐Saturated Solution

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H₂S‐Saturated Solution

Inter-Critically Reheated CGHAZ of Ultra-High-Strength Martensitic Steel with Different Cooling Rates

Simulated Coarse Grain Heat‐Affected Zone Transformation Behavior of Newly Developed Zr–Ti–RE Deoxidized High‐Strength Low‐Alloy Steels with Extremely High Impact Toughness

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Study on the mechanism of heat input on the grain boundary distribution and impact toughness in CGHAZ of X100 pipeline steel from the aspect of variant

Cited by 20 publications

References 30 publications

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H2S‐Saturated Solution

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H2S‐Saturated Solution

Inter-Critically Reheated CGHAZ of Ultra-High-Strength Martensitic Steel with Different Cooling Rates

Simulated Coarse Grain Heat‐Affected Zone Transformation Behavior of Newly Developed Zr–Ti–RE Deoxidized High‐Strength Low‐Alloy Steels with Extremely High Impact Toughness

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Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H₂S‐Saturated Solution

Microstructure Characteristics and Corrosion Behavior of Low‐Alloy High‐Strength Steel used for Armor Layer under Exposure to H₂S‐Saturated Solution