Title

TEXTURAL ANALYSIS THROUGH THICKNESS OF API X70 STEEL AFTER HOT ROLLING AND POST HEAT TREATMENT

Authorship

Masoumi, Mohammad; Abreu, Hamilton Ferreira Gomes de

Masoumi, Mohammad

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Abreu, Hamilton Ferreira Gomes de

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DOI

10.5151/1983-4764-26267

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Abstract

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.

Keywords

API-X70 steel, Hot rolling, EBSD

API-X70 steel, Hot rolling, EBSD