EVALUATION OF THROUGH THICKNESS RESIDUAL STRESS IN WC-CO COATINGS USING ELECTRO DISCHARGE HOLE DRILLING METHOD

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JALALI AZIZPOUR M.; NOUROUZI S.; SALIMIJAZI H.R.; MOHARAMI R.

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Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2012 | Volume:- | Issue:16 Page(s): 45-53

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Title

EVALUATION OF THROUGH THICKNESS RESIDUAL STRESS IN WC-CO COATINGS USING ELECTRO DISCHARGE HOLE DRILLING METHOD

Author(s)

JALALI AZIZPOUR M. | NOUROUZI S. | SALIMIJAZI H.R. | MOHARAMI R. | Issue Writer Certificate

Keywords

RESIDUAL STRESSQ2

THERMAL SPRAYQ2

WC-CO COATINGQ3

EDMQ3

ROSETTE STRAIN GAGEQ3

Abstract

Thermally sprayed coatings are inherently associated with RESIDUAL STRESSes in the coatings. These stresses vary in nature and magnitude, and have a pronounced effect on the mechanical behavior of the system. This study develops the EDM drilling process to measure the RESIDUAL STRESS in WC-Co thermally sprayed coatings, the stress state of which is difficult to obtain by a widely used method called high-speed hole-drilling method (ASTM Standard E837). The experimental results reveal that the stress curves are not uniform throughout the coating thickness. It has been found that the mean residual von Mises stress is of approximately 126MPa. Obtained results were confirmed by the value of the RESIDUAL STRESS measured by postmortem curvature method in this study (-164MPa). This technique confirms the feasibility of RESIDUAL STRESS measurement on HVOF thermally sprayed WC-CO COATINGs using ED-hole drilling method. Morphological and crystallographical studies were conducted using optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction, respectively, to evaluate the powder and coating characteristics.

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APA: Copy

JALALI AZIZPOUR, M., NOUROUZI, S., SALIMIJAZI, H.R., & MOHARAMI, R.. (2012). EVALUATION OF THROUGH THICKNESS RESIDUAL STRESS IN WC-CO COATINGS USING ELECTRO DISCHARGE HOLE DRILLING METHOD. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, -(16), 45-53. SID. https://sid.ir/paper/120967/en

Vancouver: Copy

JALALI AZIZPOUR M., NOUROUZI S., SALIMIJAZI H.R., MOHARAMI R.. EVALUATION OF THROUGH THICKNESS RESIDUAL STRESS IN WC-CO COATINGS USING ELECTRO DISCHARGE HOLE DRILLING METHOD. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2012;-(16):45-53. Available from: https://sid.ir/paper/120967/en

IEEE: Copy

M. JALALI AZIZPOUR, S. NOUROUZI, H.R. SALIMIJAZI, and R. MOHARAMI, “EVALUATION OF THROUGH THICKNESS RESIDUAL STRESS IN WC-CO COATINGS USING ELECTRO DISCHARGE HOLE DRILLING METHOD,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. -, no. 16, pp. 45–53, 2012, [Online]. Available: https://sid.ir/paper/120967/en

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