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Volume 13
Issue 4
10.3390/met13040763
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Article

Creep of High-Strength Steel Coated with Plasma Sprayed Self-Fluxing Alloy

by
Denison A. Moraes
1,
Gisele F. C. Almeida
1,
Antonio A. Couto
1,
Marcos Massi
1,
Felipe R. Caliari
2 and
Carlos R. C. Lima
1,*
1
School of Engineering, Mackenzie Presbyterian University, São Paulo 01302-907, Brazil
2
Center for Thermal Spray Research, Stony Brook University, 100 Nicolls Rd, Stony Brook, NY 11794, USA
*
Author to whom correspondence should be addressed.
Metals 2023, 13(4), 763; https://doi.org/10.3390/met13040763
Submission received: 4 March 2023 / Revised: 8 April 2023 / Accepted: 10 April 2023 / Published: 14 April 2023
(This article belongs to the Special Issue Studies on Fatigue Behavior of Engineering Material and Structures)
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Abstract

This article compares the creep testing behavior of AISI 4340 high-strength steel in the as-received and coated conditions. The coating material used was a NiCrBSi self-fluxing alloy. The microstructural characterization was carried out using optical and scanning electron microscopy. The creep tests were conducted at a temperature of 550 °C and with loads of 200, 250, and 300 MPa. The microstructure analysis of the deposited layer revealed some inclusions, very low porosity, and good adhesion to the substrate. The results of the creep tests indicated a decrease in the time to rupture under loads of 250 and 300 MPa for the coated steel. At a load of 200 MPa, the coated steel presented longer times to rupture and higher yield strength, demonstrating an improvement over the uncoated steel under these test condition. The fracture surface inspection showed a failure by a ductile fracture in both samples, with and without coating.
Keywords: AISI 4340 steel; plasma spray; creep; self-fluxing alloy AISI 4340 steel; plasma spray; creep; self-fluxing alloy

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MDPI and ACS Style

Moraes, D.A.; Almeida, G.F.C.; Couto, A.A.; Massi, M.; Caliari, F.R.; Lima, C.R.C. Creep of High-Strength Steel Coated with Plasma Sprayed Self-Fluxing Alloy. Metals 2023, 13, 763. https://doi.org/10.3390/met13040763

AMA Style

Moraes DA, Almeida GFC, Couto AA, Massi M, Caliari FR, Lima CRC. Creep of High-Strength Steel Coated with Plasma Sprayed Self-Fluxing Alloy. Metals. 2023; 13(4):763. https://doi.org/10.3390/met13040763

Chicago/Turabian Style

Moraes, Denison A., Gisele F. C. Almeida, Antonio A. Couto, Marcos Massi, Felipe R. Caliari, and Carlos R. C. Lima. 2023. "Creep of High-Strength Steel Coated with Plasma Sprayed Self-Fluxing Alloy" Metals 13, no. 4: 763. https://doi.org/10.3390/met13040763

APA Style

Moraes, D. A., Almeida, G. F. C., Couto, A. A., Massi, M., Caliari, F. R., & Lima, C. R. C. (2023). Creep of High-Strength Steel Coated with Plasma Sprayed Self-Fluxing Alloy. Metals, 13(4), 763. https://doi.org/10.3390/met13040763

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