The Effect of Additive Manufacturing on the Initial High Temperature Oxidation Properties of RE-containing FeCrAl alloys

Purpose This paper aims to investigate the thermal oxidation characteristics of the unsaturated bonds (C=C) of trimethylolpropane trioleate (TMPTO) and to reveal the high temperature oxidation decay mechanism of unsaturated esters and the nature of the anti-oxidation properties of the additives. Design/methodology/approach Using a DXR laser microscopic Raman spectrometer and Linkam FTIR600 temperature control platform, the isothermal oxidation experiments of TMPTO with or without 1.0 wt. % of different antioxidants were performed. Findings The results indicated that the Raman peaks of =C-H, C=C and -CH2- weaken gradually with prolonged oxidation time, and the corresponding Raman intensities drop rapidly at higher temperatures. The aromatic amine antioxidant can decrease the attenuation of peak intensity, as it significantly reduces the rate constant of C=C thermal oxidation. The hindered phenolic antioxidant has a protective effect during the early stages of oxidation (induction period), but it may accelerate the oxidation of C=C afterwards. Originality/value Research on the structure changes of synthetic esters during oxidation by Raman spectroscopy will be of great importance in promoting the use of Raman spectroscopy to analyze the oxidation of lubricants.

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Manufacturing And High Temperature Oxidation Properties Of Electro-Sprayed Fe-24.5% Cr-5%Al Powder Porous Metal

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0091 ◽

2015 ◽

Vol 60 (2) ◽

pp. 1169-1173

Author(s):

Kee-Ahn Lee ◽

Jae-Sung Oh ◽

Young-Min Kong ◽

Byoung-Kee Kim

Keyword(s):

High Temperature ◽

High Temperature Oxidation ◽

Porous Metal ◽

Porous Metals ◽

Temperature Oxidation ◽

Spray Process ◽

Surface Areas ◽

Thermal Gravimetry ◽

Oxidation Properties ◽

Al Powder

Abstract Fe-Cr-Al based Powder porous metals were manufactured using a new electro-spray process, and the microstructures and high-temperature oxidation properties were examined. The porous materials were obtained at different sintering temperatures (1350°C, 1400°C, 1450°C, and 1500°)C and with different pore sizes (500 μm, 450 μm, and 200 μm). High-temperature oxidation experiments (TGA, Thermal Gravimetry Analysis) were conducted for 24 hours at 1000°C in a 79% N2+ 21% O2, 100 mL/min. atmosphere. The Fe-Cr-Al powder porous metals manufactured through the electro-spray process showed more-excellent oxidation resistance as sintering temperature and pore size increased. In addition, the fact that the densities and surface areas of the abovementioned powder porous metals had the largest effects on the metal’s oxidation properties could be identified.

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Fe-Cr-B Metal/Ceramic Composite Manufacturing with Metal Injection Molding and Its Microstructure, High Temperature Tensile and High Temperature Oxidation Properties

Contributed Papers from MS&T17 ◽

10.7449/2017mst/2017/mst_2017_1158_1160 ◽

2017 ◽

Author(s):

Y. Joo ◽

Y. Kim ◽

T. Yoon ◽

K. Lee

Keyword(s):

High Temperature ◽

Injection Molding ◽

High Temperature Oxidation ◽

Ceramic Composite ◽

Metal Injection Molding ◽

Temperature Oxidation ◽

Composite Manufacturing ◽

Metal Ceramic ◽

Oxidation Properties ◽

High Temperature Tensile

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High Temperature Oxidation Behavior of NiAl and Ni3Al Argon Arc Claddings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.441 ◽

2011 ◽

Vol 189-193 ◽

pp. 441-446

Author(s):

Xiao Xia Tan ◽

Zong De Liu

Keyword(s):

High Temperature ◽

High Temperature Oxidation ◽

Steel Substrate ◽

Temperature Oxidation ◽

Metallurgical Bonding ◽

The Matrix ◽

Oxidation Properties ◽

High Temperature Oxidation Behavior ◽

16Mn Steel

NiAl and Ni3Al intermetallic compound claddings are prepared by argon arc cladding technology on the 16Mn steel substrate. These claddings were oxidized for 100 hours at 850 and the oxide quality of each sample was recorded every 10 hours. The results show that the NiAl and Ni3Al claddings have homogeneous structure and few defects, and form excellent metallurgical bonding with the matrix. The oxidation kinetics results show that, the oxidation weight gain rate of NiAl was more stable than Ni3Al and tended to zero earlier. Oxide layer spallation of Ni3Al cladding was more serious than that of NiAl cladding. Thus, NiAl argon arc cladding has the more excellent high temperature oxidation properties than Ni3Al argon arc cladding.

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Designing high-temperature oxidation-resistant titanium matrix composites via directed energy deposition-based additive manufacturing

Materials & Design ◽

10.1016/j.matdes.2021.110205 ◽

2021 ◽

pp. 110205

Author(s):

Kellen D. Traxel ◽

Amit Bandyopadhyay

Keyword(s):

High Temperature ◽

Additive Manufacturing ◽

High Temperature Oxidation ◽

Energy Deposition ◽

Matrix Composites ◽

Titanium Matrix ◽

Titanium Matrix Composites ◽

Temperature Oxidation ◽

Oxidation Resistant ◽

Directed Energy

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HIGH TEMPERATURE OXIDATION OF TI-6AL-4V ALLOY FABRICATED BY ADDITIVE MANUFACTURING. INFLUENCE ON MECHANICAL PROPERTIES

MATEC Web of Conferences ◽

10.1051/matecconf/202032103006 ◽

2020 ◽

Vol 321 ◽

pp. 03006

Author(s):

Antoine CASADEBAIGT ◽

Daniel MONCEAU ◽

Jonathan HUGUES

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Additive Manufacturing ◽

Titanium Alloys ◽

Oxidation Kinetics ◽

High Temperature Oxidation ◽

Effect Of Temperature ◽

Premature Failure ◽

Temperature Oxidation

Titanium alloys, such as Ti-6Al-4V alloy, fabricated by additive manufacturing processes is a winning combination in the aeronautic field. Indeed, the high specific mechanical properties of titanium alloys with the optimized design of parts allowed by additive manufacturing should allow aircraft weight reduction. But, the long term use of Ti-6Al-4V alloy is limited to 315 °C due to high oxidation kinetics above this temperature [1]. The formation of an oxygen diffusion zone in the metal and an oxide layer above it may reduce the durability of titanium parts leading to premature failure [2, 3]. In this study, Ti-6Al-4V alloy was fabricated by Electron Beam Melting (EBM). As built microstructure evolutions after Hot Isostatic Pressure (HIP) treatment at 920 °C and 1000 bar for 2h were investigated. As built microstructure of Ti-6Al-4V fabricated by EBM was composed of Ti-α laths in a Ti-β matrix. High temperature oxidation of Ti-6Al-4V alloy at 600 °C of as-built and HIP-ed microstructures was studied. This temperature was chosen to increase oxidation kinetics and to study the influence of oxidation on tensile mechanical properties. In parallel, two other oxidation temperatures, i.e. 500 °C and 550°C allowed to access to the effect of temperature on long-term oxidation.

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