Corrosion behavior of the resistance sintered TiAl based intermetallics induced by two different molten salt mixture

Garip, Y.; Özdemir, Ö.

doi:10.1016/j.corsci.2020.108819

Cited by 31 publications

(9 citation statements)

References 48 publications

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“…Then, these volatile chlorides (such as AlClx, CrClx, FeClx) will volatilize through the same route to the outer surface, where the oxygen activity is higher. Here, the volatile chlorides will oxidize because their corresponding oxides are thermodynamically more stable according to the following reaction [16]: MClx(g) + O2 = MOy + Cl2(g)…”

Section: Fig 2 Xrd Patterns Of the Hot Corroded Cocrfenial Hea Inmentioning

confidence: 99%

“…Moreover, another advantage of this method is that it can prevent chemical heterogeneity, provide microstructural control and offer a highly dense microstructure with refined grains. Development of these achieves at fast heating rates and in short sintering durations, without compromising mechanical properties [12][13][14][15][16][17]. Considering the above considerations, the RS method provides a more innovative and convenient way to produce HEAs compared to other conventional processes.…”

Section: Introductionmentioning

confidence: 99%

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Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

Garip¹

2022

Politeknik Dergisi

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Section: Fig 2 Xrd Patterns Of the Hot Corroded Cocrfenial Hea Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

Garip¹

2022

Politeknik Dergisi

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“…Such environmental elements during fuel combustion promote damage to the protective oxide film by forming contaminants such as V 2 O 5 and Na 2 SO 4 [79]. This degradation form was initially identified in the early 1950s on combustion engines and boilers [80] and has been explored in numerous research works [50,[81][82][83][84][85][86][87].…”

Section: Hot Corrosion 41 Definitionmentioning

confidence: 99%

“…Nb is one element used in many research works [86][87][88][89][90] to improve the oxidation resistance of TiAl alloys. Al activities are promoted by Nb additions and accelerate protective Al 2 O 3 oxide film formation, limiting oxygen diffusion into the alloy [166].…”

Section: Effect Of Alloy Modifications On the Oxidation Resistance Of Tialmentioning

confidence: 99%

Hot Corrosion and Oxidation Behaviour of TiAl Alloys during Fabrication by Laser Powder Bed Additive Manufacturing Process

Mogale¹,

Matizamhuka²,

Cobbinah³

2022

Corrosion - Fundamentals and Protection Mechanisms

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This research paper summarises the practical relevance of additive manufacturing with particular attention to the latest laser powder bed fusion (L-PBF) technology. L-PBF is a promising processing technique, integrating intelligent and advanced manufacturing systems for aerospace gas turbine components. Some of the added benefits of implementing such technologies compared to traditional processing methods include the freedom to customise high complexity components and rapid prototyping. Titanium aluminide (TiAl) alloys used in harsh environmental settings of turbomachinery, such as low-pressure turbine blades, have gained much interest. TiAl alloys are deemed by researchers as replacement candidates for the heavier Ni-based superalloys due to attractive properties like high strength, creep resistance, excellent resistance to corrosion and wear at elevated temperatures. Several conventional processing technologies such as ingot metallurgy, casting, and solid-state powder sintering can also be utilised to manufacture TiAl alloys employed in high-temperature applications. This chapter focuses on compositional variations, microstructure, and processing of TiAl alloys via L-PBF. Afterward, the hot corrosion aspects of TiAl alloys, including classification, characteristics, mechanisms and preventative measures, are discussed. Oxidation behaviour, kinetics and prevention control measures such as surface and alloy modifications of TiAl alloys at high temperature are assessed. Development trends for improving the hot corrosion and oxidation resistance of TiAl alloys possibly affecting future use of TiAl alloys are identified.

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“…Molten salts are used in various industries due to their high electrical conductivity, high-density processing, and fluid properties. Recently, they have been attracting increasing attention for applications in jet engines [1][2][3][4][5], fuel cells [6][7][8], energy storage [9][10][11], and metal purifications [12][13][14]. However, molten salts corrode container materials and various components of electrolysis equipment.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Corrosion Behavior of Al-Coated Ni-Base Alloys in Lithium Molten Salt for Electroreduction

et al. 2021

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The electrolytic reduction of a spent oxide fuel involves the liberation of oxygen in a molten salt LiCl–Li2O electrolyte, which creates a corrosive environment for typical structural materials. In this study, the corrosion behaviors of Al–Y-coated specimens in a Li molten salt kept under an oxidizing atmosphere at 650 °C for 72 and 168 h were investigated. The weight loss fraction of the coated specimen to bare specimen was approximately 60% for 3% Li2O and 54% for 8% Li2O at 72 h, and approximately 38% for 3% Li2O and 30% for 8% Li2O at 168 h. Corrosion was induced in the LiCl–Li2O molten salt by the basic oxide ion O2− via the basic flux mechanism, and the corrosion product was found to be dependent on the activity of the O2− ion. The increase in weight loss may have been caused by the increase in the O2− concentration due to the increase in the Li2O concentration rather than being because of the increased reaction time. The Al–Y coating was found to be beneficial for hot corrosion resistance, which can be useful for handling high-temperature lithium molten salt under an oxidizing atmosphere.

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Corrosion behavior of the resistance sintered TiAl based intermetallics induced by two different molten salt mixture

Cited by 31 publications

References 48 publications

Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

Hot Corrosion and Oxidation Behaviour of TiAl Alloys during Fabrication by Laser Powder Bed Additive Manufacturing Process

High-Temperature Corrosion Behavior of Al-Coated Ni-Base Alloys in Lithium Molten Salt for Electroreduction

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