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fatigue crack growth rate

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Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1291-1295, May 8–11, 2000,
... Abstract In situ values of Young's modulus and Poisson's ratio for thermal spray coatings are needed to evaluate properties and characteristics of thermal spray coatings such as residual stresses, in-service stresses, bond strength, fracture toughness, and fatigue crack growth rates...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 115-121, May 24–28, 2021,
... of the plasma spray deposits are comparable with those of the SQ-PM reference material, but inferior to those of the FA-PM reference. The results of various property tests are presented and analyzed in the paper. bending tensile strength chemical composition ductility fatigue crack growth rate...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 131-138, May 24–28, 2021,
... was determined from The fatigue crack growth rates were measured using a weight and dimensions of the samples. The upper face of each resonance technique based on ASTM E647 standard [10] at a sample was mirror polished to enable scanning by laser stress ratio R ~ -1. The specimens are loaded in pure bending...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1297-1301, May 8–11, 2000,
... segments leads to considerable local of cycles to failure N for the coated and uncoated differences in the fatigue crack growth rate and to a aluminum specimens. The results indicate that HFPD considerable increase in the total crack front length; sprayed WC-Co coating slightly improves the fatigue thereby...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 635-641, May 8–11, 2000,
...; thus interface strength must be interface toughness to that of the substrate is an important represented by the properties for fatigue crack growth behavior. parameter which determines the crack propagation behavior One exception was found in the aged/mirror specimens at room near the interface, where...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 66-74, May 24–28, 2021,
... yttrium, zirconium, hafnium, cerium and silicon reduced growth rate oxide scale by inhibiting outward diffusion of Thermal barrier coating (TBC) is deposited to hot sections of aluminum [11-12], improved the adhesion between TGO and both aero engines and industrial gas turbines to reduce surface bond coat...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 386-395, May 24–28, 2021,
...., erosion and fatigue). formation of shear bands in the Al matrix locally as well as cracking in the ceramic particles. Introduction From a computational respective, the majority of previous Al-based metal matrix composites (Al-MMCs) have been studies on Al-MMCs have been allocated to axial tensile widely...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 9-17, May 24–28, 2021,
... strongly affect the TGO formation, terms of fatigue, creep, or hot corrosion. crack propagation and failure mechanisms of the TBC systems [12]. The parameters to further improve the high temperature The majority of currently used TBC systems is composed of oxidation behavior of these coatings include...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 553-560, May 24–28, 2021,
... on its resistance to plastic deformation, i.e. material hardness [2, 17]. (II) Since material removal usually occurs via Oxygen Content crack growth, in addition also the fatigue strength must be Global oxygen contents were quantitatively determined on considered [7, 18]. A higher fatigue strength...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1337-1342, May 25–29, 1998,
.... It was also found that coating quality could be further improved by adding a diffusive Cr-Al layer prior to laser remelting. This added step reduces pore volume and layer thickness and increases adhesion without cracks, chips, or spalls. The examination also showed that, depending on cooling rate...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 750-757, May 24–28, 2021,
... Introduction improved the coated AISI 4340 steel substrate's fatigue behavior due to the delay in cracks' formation and growth. Modification of functional surfaces is an economical way to Nevertheless, the impact in SP is an uncontrolled process that improve the heat, corrosion, or wear resistance...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1607-1611, May 25–29, 1998,
... of the samples. 13-Nov-1996 11:02:86 Elapsed" Vert- 5008 counts fll Ta 10 um 1 IL0 Figure 8. SEM micrograph of NiCoCrAlYTa coating - Wr ri after thermal cyclic test CrFe Co Nl Figure 8 shows the appearance of cracks at the interface. A precise analysis of the rate of porosity has been B ' 1 7 * IB ' 1 9...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1241-1248, May 8–11, 2000,
.... With an increase in The performance of plasma sprayed coatings during the content of NiCoCrAlY in different layers, the increase rate thermal cycling is related directly to the generation of thermal of CTE increases with temperature. fatigue cracks caused by the high residual stress in coatings. Finite element...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 177-188, May 24–28, 2021,
... microstructure and accumulation of residual stresses which may induce micro- inter-particular fracture characteristics of sprayed coatings is crack initiation and growth and, ultimately, the opening of essential to improve their properties. To do so, post-spraying coating-coating or substrate-coating interfaces...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1325-1330, May 8–11, 2000,
... of the TBC Bond coating oxidation and build up of cumulative samples. Oxide growth was showed to follow a typical parabolic stresses in the TBC systems were identified as the main events rate, from which a critical oxide layer thickness could be that lead to coating spallation. The higher young's modulus...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 993-998, May 25–29, 1998,
... to determine, for each strain rate, from similar bars of AM3 single crystal Ni-base alloy. Its the variation of the strain to cracking as a function of composition is reported in Table I. Three types of test temperature. DBTT was then defined as the temperature of specimens were machined: the large increase...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 561-568, May 24–28, 2021,
... of the particles kinetic energy could be consumed by crack growth at the impact leading to particle fragmentation. 564 Figure 6: Hardness evolution according Figure 8: Wear amounts for several coatings and to the coating alumina content. corresponding counterbodies in C1 testing conditions. Tribological tests SEM...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 431-439, May 24–28, 2021,
... erosion rate, 20.26 mg·h 1, highest porosity, 0.16%, and lowest oxide content, 4.85%. Figure 7 presents the indentation mark on the 45 m FeMnCrSi coating with small crack growth in its left corner, which an example of a valid crack to measure the fracture toughness value in MPa·m1/2. The higher KIC...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1133-1138, May 25–29, 1998,
... of HAp retrieved implants are discussed in relation to the general facilitates more bone contact by directing bone growth coating features in plasma sprayed HAp coatings. towards the implant [2] and allowing gaps of several millimetres to be closed between the osseous cavity and the PROSTHESIS...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 625-633, May 8–11, 2000,
... by into the implant. Therefore, it is widely used to improve the plasma spraying often show low load bearing capacity and the fixation of prosthetic appliances to the human bone structure. tendency to cracking and fracture. Therefore, to bridge the gap HA coatings can be plasma sprayed on titanium substrates...