Investigation of oxide scale adhesion on hot-rolled steel using the tensile test and acoustic emission

Authors

  • Seksan SINGTHANU Faculty of Engineering, Pathumwan Institute of Technology, 833 Rama1 Road, Wang Mai, Pathumwan, Bangkok, 10330, Thailand
  • Prayoon SURIN Faculty of Engineering, Pathumwan Institute of Technology, 833 Rama1 Road, Wang Mai, Pathumwan, Bangkok, 10330, Thailand
  • Manop PIPATHATTAKUL Faculty of Engineering, Pathumwan Institute of Technology, 833 Rama1 Road, Wang Mai, Pathumwan, Bangkok, 10330, Thailand
  • Thanasak NILSONTHI High Temperature Corrosion Research Centre and Department of Materials and Production Technology Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, 1518, Pracharat 1 Road, Wongsawang, Bangsue, Bangkok, 10800, Thailand

DOI:

https://doi.org/10.55713/jmmm.v33i2.1579

Keywords:

tensile test, acoustic emission, oxide scale, adhesion, hot-rolled steel coil

Abstract

This article addresses applying a tensile test with a CCD camera to assess scale adhesion on hot-rolled steel as a function of hot-rolled coil position. The scale adhesion in this study was shown in the value of the strain initiating the first scale spallation. The result of strain initiating the first scale spallation was confirmed with an acoustic emission (AE) method. The as-received hot-rolled coil was studied at the head, middle, and tail positions. A scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to examine the scale morphology and phase identification respectively. The results show that the oxide scale comprises hematite and magnetite layers. It was found that the higher strain initiating the first scale spallation was revealed on the scale formed on the hot-rolled coil at the head and middle positions. This indicates that the oxide scale was more difficult to remove than at the tail position of the coil. The scale growth and cooling affects the stresses on the oxide layer and the steel substrate. A thin oxide layer on tail position of the hot-rolled coil will easily first crack and then buckle and followed by spallation, while a thick scale on head and middle positions of the hot-rolled coil was harder than that thin scale.

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Published

2023-06-27

How to Cite

[1]
S. . SINGTHANU, P. . SURIN, M. . PIPATHATTAKUL, and T. . NILSONTHI, “Investigation of oxide scale adhesion on hot-rolled steel using the tensile test and acoustic emission”, J Met Mater Miner, vol. 33, no. 2, pp. 23–28, Jun. 2023.

Issue

Vol. 33 No. 2 (2023): June

Section

Original Research Articles

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