THE EFFECT OF HEAT TREATMENT ON FRACTURE TOUGHNESS OF WC-CO HVOF COATINGS

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KHAMENEHASL SH.; HEYDARZADEH SOHI M.; HOKAMOTO K.; KHODAMI A.M.

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Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2005 | Volume:1 | Issue:1 Page(s): 2-7

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Title

THE EFFECT OF HEAT TREATMENT ON FRACTURE TOUGHNESS OF WC-CO HVOF COATINGS

Author(s)

KHAMENEHASL SH. | HEYDARZADEH SOHI M. | HOKAMOTO K. | KHODAMI A.M. | Issue Writer Certificate

Keywords

HVOFQ4

WC-J7COQ2

HET TREATMENTQ2

FRACTURE TOUGHNESSQ2

INDENTATIONQ2

Abstract

WC-17Co coatings were deposited onto mild steel substrate using HVOF spray technique. The coated specimens were then heat-treated at different temperatures in a vacuum chamber. The coatings were studied in the as sprayed and heat treated conditions. Metallographic examination by Optical scanning, electron microscopes and XRD analysis indicated that some brittle eta phases were produced at high temperature heat-treatment. Generation of these phases increased the hardness of the coatings. The INDENTATION FRACTURE TOUGHNESS of the coatings has also been studied. This method showed that these coatings exhibited anisotropic crack propagation parallel to the coating / substrate interface. The cracks propagate at the regions of low FRACTURE TOUGHNESS appeared to be at the boundary of the fully-melted region of the split and its inner partially melted core. The high amount of brittle eta phases decreases the FRACTURE TOUGHNESS of heat-treated coatings at high temperatures.

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APA: Copy

KHAMENEHASL, SH., HEYDARZADEH SOHI, M., HOKAMOTO, K., & KHODAMI, A.M.. (2005). THE EFFECT OF HEAT TREATMENT ON FRACTURE TOUGHNESS OF WC-CO HVOF COATINGS. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, 1(1), 2-7. SID. https://sid.ir/paper/120941/en

Vancouver: Copy

KHAMENEHASL SH., HEYDARZADEH SOHI M., HOKAMOTO K., KHODAMI A.M.. THE EFFECT OF HEAT TREATMENT ON FRACTURE TOUGHNESS OF WC-CO HVOF COATINGS. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2005;1(1):2-7. Available from: https://sid.ir/paper/120941/en

IEEE: Copy

SH. KHAMENEHASL, M. HEYDARZADEH SOHI, K. HOKAMOTO, and A.M. KHODAMI, “THE EFFECT OF HEAT TREATMENT ON FRACTURE TOUGHNESS OF WC-CO HVOF COATINGS,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. 1, no. 1, pp. 2–7, 2005, [Online]. Available: https://sid.ir/paper/120941/en

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