TY - JOUR
T1 - Two Uncoating Techniques for Measuring Cold-Formed Steel Residual Stress Using Cos-α X-ray Diffraction Method
AU - Swastika, Tri Widya
AU - Purnomo, Heru
AU - Ashadi, Henki Wibowo
AU - Muslih, Muhammad Refai
AU - Apriansyah, Rifky
AU - Sani, Mohd Syahrul Hisyam bin Mohd
N1 - Publisher Copyright:
© (2024), (Insight Society). All rights reserved.
PY - 2024
Y1 - 2024
N2 - The cold-bending effect during the roll-forming process may affect the material's mechanical properties and induce residual stress in the cold-formed steel sections. Cos-α X-ray Diffraction is an appropriate method for measuring residual stress in cold-formed steel due to the materials’ thinness. This method also offers excellent precision and simplicity. However, the limited penetrating ability of X-rays, which extend only a few microns, significantly hinders the measurement of residual stresses in cold-formed steel when coatings are present. Therefore, this study will implement two uncoating or de-coating techniques for measuring residual stress using the cos-α X-ray Diffraction method on the surface of cold-formed steel with a 50 μm layer of aluminum-zinc coating. These techniques include water sanding and chemical solutions. Two procedures are performed for the chemical solution: the first procedure combines a 25% hydrochloric acid (HCl) solution with a 25% ammonium hydroxide (NH4OH) solution, while the second procedure uses only a 25% hydrochloric acid (HCl) solution. This study demonstrates that the second procedure effectively removes the surface coating from cold-formed steel and provides a good classification of cos-α X-ray Diffraction intensity data related to the Debye-Scherrer ring. A combination of 25% hydrochloric acid (HCl) and 25% ammonium hydroxide (NH4OH) solution results in a mediocre classification. On the other hand, the water sanding technique produced poor classifications. Furthermore, the key to the success of the cos-α X-ray Diffraction method is removing the coating from the cold-formed steel.
AB - The cold-bending effect during the roll-forming process may affect the material's mechanical properties and induce residual stress in the cold-formed steel sections. Cos-α X-ray Diffraction is an appropriate method for measuring residual stress in cold-formed steel due to the materials’ thinness. This method also offers excellent precision and simplicity. However, the limited penetrating ability of X-rays, which extend only a few microns, significantly hinders the measurement of residual stresses in cold-formed steel when coatings are present. Therefore, this study will implement two uncoating or de-coating techniques for measuring residual stress using the cos-α X-ray Diffraction method on the surface of cold-formed steel with a 50 μm layer of aluminum-zinc coating. These techniques include water sanding and chemical solutions. Two procedures are performed for the chemical solution: the first procedure combines a 25% hydrochloric acid (HCl) solution with a 25% ammonium hydroxide (NH4OH) solution, while the second procedure uses only a 25% hydrochloric acid (HCl) solution. This study demonstrates that the second procedure effectively removes the surface coating from cold-formed steel and provides a good classification of cos-α X-ray Diffraction intensity data related to the Debye-Scherrer ring. A combination of 25% hydrochloric acid (HCl) and 25% ammonium hydroxide (NH4OH) solution results in a mediocre classification. On the other hand, the water sanding technique produced poor classifications. Furthermore, the key to the success of the cos-α X-ray Diffraction method is removing the coating from the cold-formed steel.
KW - cold-formed steel
KW - Cos-α X-ray diffraction method
KW - residual stress
KW - Uncoating techniques
UR - http://www.scopus.com/inward/record.url?scp=85214317534&partnerID=8YFLogxK
U2 - 10.18517/ijaseit.14.6.20549
DO - 10.18517/ijaseit.14.6.20549
M3 - Article
AN - SCOPUS:85214317534
SN - 2088-5334
VL - 14
SP - 2008
EP - 2017
JO - International Journal on Advanced Science, Engineering and Information Technology
JF - International Journal on Advanced Science, Engineering and Information Technology
IS - 6
ER -