Texture, local misorientation, grain boundary and recrystallization fraction in pipeline steels related to hydrogen induced cracking

Mohtadi-Bonab, M.A.; Eskandari, M.; Szpunar, Jerzy A.

doi:10.1016/j.msea.2014.10.009

Cited by 188 publications

(46 citation statements)

References 19 publications

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“…However, most HABs consisted of acicular ferrite and lath bainite, which had interlocking structures to suppress cracks. Therefore, Mohtadi‐Bonab et al and Liu et al all verified that the fractions of LABs near the SSC or HIC cracking was much higher than for the regions distant from cracks and that HABs could play an important role in suppressing cracks . However, Venegas et al had different opinions when they studied the effects of microstructure, microtexture, and mesotexture on HIC cracking pathways in X46 pipeline steel by EBSD.…”

Section: Resultsmentioning

confidence: 99%

Effects of cooling processes on microstructure and susceptibility of hydrogen‐induced cracking of X80 pipeline steel

Song

Cheng

et al. 2017

Materials & Corrosion

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The effects of three different kinds of cooling processes on the properties of the microstructure for hydrogen‐induced cracking (HIC) resistance and hydrogen atom diffusion on X80 pipeline steel have been investigated in the laboratory. The results show that Steel F after furnace cooling contains coarse polygonal ferrite (PF), quasi‐polygonal ferrite (QF), and a small amount of granular bainite (GB). Steel A after air cooling contains finer QF and GB. Steel W after water cooling quenching treatment contains a large amount of GB, lath bainite (LB), and a small amount of martensite (M) and ferrite. In addition, the results of hydrogen permeation test show that hydrogen atoms diffuse the fastest in Steel W with a finer microstructure and grains, and the content of dissolved hydrogen atoms is lowest in Steel F. After soaking corrosion tests, Steel A has the best HIC resistance properties, due to the role of more high‐angle grain boundaries (HABs) and fewer grain boundaries with the <100> orientation.

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Section: Resultsmentioning

confidence: 99%

Effects of cooling processes on microstructure and susceptibility of hydrogen‐induced cracking of X80 pipeline steel

Song

Cheng

et al. 2017

Materials & Corrosion

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“…EBSD analysis of FIB polished surface (50 × 50 μm 2 areas, Fig. 3) reveals low local misorientation inside the grains (i.e., lower than 0.5° ( Mohtadi-Bonab et al, 2015) except in the vicinity of a subgrain boundary) irrespective of the phase considered.…”

Section: Microstructure Of the As-received Materialsmentioning

confidence: 98%

Influence of temperature cycles on strength and microstructure of spray-deposited Si–Al CE9F alloy

Mauduit

Dusserre

Cutard

2019

Mechanics of Materials

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A B S T R A C T This paper investigates the effects of temperature cycles between −55°C and 125°C (the temperature range for intended space application) on the strength and microstructure of spray deposited Si-Al CE9F alloy. After 500 cycles, the strength is significantly improved of 9% (i.e., 26 MPa). Moreover the Weibull modulus also undergoes a significant increase. Microstructure characterizations by XRD, SEM, EBSD and DSC evidence recovery and recrystallization processes in the Al phase, and subgrain development at grain boundaries in the Si phase, leading to lower crystallite size. A Hall-Petch dependence of mean strength to average crystallite size in Si is proposed as strengthening mechanism.

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“…It can be attributed to the high stored strain energy and different texture formed in both regions: on the surface and in the mid-thickness of tested sheets. The stored strain energy was higher on mid-thickness region than surface so that it provided higher driving force and resulted in a full recrystallization [14]. In the recovery process, the deformed grains reduce their stored energy.…”

Section: Microtexture Studymentioning

confidence: 99%

“…These recrystallized grains have a higher resistance to plastic deformation and crack formation. Moreover, dynamic recrystallization commonly forms {110} and {111}//ND texture component during hot-rolling and it is known that a dominant {111}//ND texture increases crack formation resistance in pipeline steel [13,14]. The volume fraction of grains with <111> orientation increased with the recrystallized grain fractions.…”

Section: Microtexture Studymentioning

confidence: 99%

Textural Analysis Through Thickness of Api X70 Steel After Hot Rolling and Post Heat Treatment

Masoumi¹,

Abreu²

2017

Anais Do Seminário De Laminação E Conformação

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In the present study, API 5L X70 pipeline steel samples were deformed by hot-rolling cooled in air or quenched in water and subsequently tempered at different temperatures. X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) technique were used to analyze the texture evolution from the initiate state to rolling and tempering state at mid-thickness and near surface plane of all samples. The results showed that the mid-thickness region is richer in {100}//ND oriented grains known as more susceptible to crack formation and growth through. Hot deformed specimen showed dynamic recrystallization grains while quench tempered sample at 700°C evidenced recovery and grain growth.

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Texture, local misorientation, grain boundary and recrystallization fraction in pipeline steels related to hydrogen induced cracking

Cited by 188 publications

References 19 publications

Effects of cooling processes on microstructure and susceptibility of hydrogen‐induced cracking of X80 pipeline steel

Effects of cooling processes on microstructure and susceptibility of hydrogen‐induced cracking of X80 pipeline steel

Influence of temperature cycles on strength and microstructure of spray-deposited Si–Al CE9F alloy

Textural Analysis Through Thickness of Api X70 Steel After Hot Rolling and Post Heat Treatment

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