Kinetics and Microstructural Investigation of High-Temperature Oxidation of IN-738LC Super Alloy

Hamidi, Samer; Rahimipour, Mohammad Reza; Eshraghi, Mohamad Javad; Hadavi, S.M.M.; Esfahani, Hamid

doi:10.1007/s11665-016-2487-4

“…6 e depicts the high-resolution O 1 s scan and confirms the presence of significant amounts of hydroxide at the surface. These results agree with those in the literature 19 , 20 as some researchers have reported that the oxides present at the surface of IN 738 alloys at high-temperature are NiO, Cr 2 O 3 , TiO 2 , and Al 2 O 3 . Note that Ni(OH) 2 was also observed depending on handling and storage conditions 21 .…”

Section: Resultssupporting

confidence: 93%

“…Unfortunately, after extensive research, no literature is available on XPS analysis of IN 738 at room temperature, preventing reliable comparisons. However, some studies at high temperature (> 900 °C) showed the presence of Ti and Al at the surface of samples 19 , 20 . Consequently, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

Galindo,

Espiritu,

Gutierrez

et al. 2024

Sci Rep

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A new method to assess the quality of additive manufacturing (AM) metal powders using the triboelectric charging concept is demonstrated using CpTi, Ti6Al4V, AlSi10Mg, IN 738, and SS 316L powders. For each powder tested, the surface chemical composition was first analyzed using X-ray photoelectron spectroscopy (XPS) to determine the composition of the passivation layer. Some modifications to the current GranuCharge™ setup, developed by GranuTools™, were then performed by incorporating a flow rate measuring tool to assess how tribocharging is affected as a function of flow rate. Variations in the tribocharging response have been found with the flow rate of CpTi, AlSi10Mg and SS 316L powders. Moreover, results suggest that the tribocharging behavior might not be the same even with powders fabricated with the same passivation process. Finally, the compressed exponential model of Trachenko and Zaccone was used to reproduce the tribocharging behavior of the powders. The models were found to work best when the stretch constant β = 1.5, which is identical to the value found in other systems such as structural glasses, colloidal gels, entangled polymers, and supercooled liquids, which experience jamming when motion of individual particles become restricted, causing their motion to slow down.

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“…Also, Fig.5edepicts the high-resolution O 1s scan and con rms the presence of signi cant amounts of hydroxide at the surface. These results agree with those in the literature[19,20] as some researchers have reported that the oxides present at the surface of IN 738 alloys at high-temperature are NiO, Cr 2 O 3 , TiO 2 , and Al 2 O 3 .…”

supporting

confidence: 93%

“…To determine the type of species at the surface, Al 2p, and O 1s high-resolution scans were acquired. Figure 4a shows the high-resolution scan of showed the presence of Ti and Al at the surface of samples [19,20]. Consequently, as shown in Fig.…”

Section: Alsi10mg Powdermentioning

confidence: 96%

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

Galindo,

Espiritu,

Gutierrez

et al. 2024

Preprint

0

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A new method to assess the quality of additive manufacturing (AM) metal powders using the triboelectric charging concept is demonstrated using CpTi, Ti6Al4V, AlSi10Mg, IN 738, and SS 316L powders. For each powder tested, the surface chemical composition was first analyzed using X-ray photoelectron spectroscopy (XPS) to determine the composition of the passivation layer. Some modifications to the current GranuCharge™ setup, developed by GranuTools™, were then performed by incorporating a flow rate measuring tool to assess how tribocharging is affected as a function of flow rate. Variations in the tribocharging response have been found with the flow rate of CpTi, AlSi10Mg and SS 316L powders. Moreover, results suggest that the tribocharging behavior might not be the same even with powders fabricated with the same passivation process. Finally, the compressed exponential model of Trachenko and Zaccone was used to reproduce the tribocharging behavior of the powders. The models were found to work best when the stretch constant β = 1.5, which is identical to the value found in other systems such as structural glasses, colloidal gels, entangled polymers, and supercooled liquids, which experience jamming when motion of individual particles become restricted, causing their motion to slow down.

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“…Elemento 1 (% Peso) 2 (% Peso) 3 (% Peso) 4 (% Peso) 5 (% Peso) 6 (% Peso) 7 (% Peso) C 1,02 0,99 1,31 O teor de alumínio na liga VAT46® é menor que 1,5%, porém este elemento está contido na formação das fases γ' [29], [48], o que pode favorecer a formação de uma camada de óxido rico neste elemento, como indica o ponto 3.…”

Section: Microestruturaunclassified

Efeito Da Fase Delta E Da Presença De Vapor D Água No Estágio Inicial Da Oxidação Da Liga Vat46

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Kinetics and Microstructural Investigation of High-Temperature Oxidation of IN-738LC Super Alloy

Cited by 8 publications

References 45 publications

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

Efeito Da Fase Delta E Da Presença De Vapor D Água No Estágio Inicial Da Oxidação Da Liga Vat46

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