scholarly journals High-temperature oxidation performance and its mechanism of TiC/Inconel 625 composites prepared by laser metal deposition additive manufacturing

2015 ◽  
Vol 27 (S1) ◽  
pp. S17005 ◽  
Author(s):  
Chen Hong ◽  
Dongdong Gu ◽  
Donghua Dai ◽  
Sainan Cao ◽  
Moritz Alkhayat ◽  
...  
Keyword(s):  
High Temperature ◽  
Additive Manufacturing ◽  
High Temperature Oxidation ◽  
Metal Deposition ◽  
Inconel 625 ◽  
Laser Metal Deposition ◽  
Temperature Oxidation ◽  
Oxidation Performance

scholarly journals High Temperature Oxidation Performance of an Additively Manufactured Mo–9Si–8B Alloy

2021 ◽  
Author(s):  
Julia Becker ◽  
Sven Schmigalla ◽  
Sabine Schultze ◽  
Silja-Katharina Rittinghaus ◽  
Andreas Weisheit ◽  
...  
Keyword(s):  
High Temperature ◽  
Additive Manufacturing ◽  
High Temperature Oxidation ◽  
Cyclic Oxidation ◽  
Energy Deposition ◽  
Technical Feasibility ◽  
Temperature Oxidation ◽  
Oxidation Performance ◽  
Directed Energy ◽  
Oxidation Mechanisms

AbstractAs reported in previous studies, the processing of Mo–Si–B alloys using additive manufacturing (AM) techniques, like directed energy deposition (DED) shows a high technical feasibility. The present work investigates the cyclic oxidation performance of an AM DED Mo–9Si–8B alloy. Depending on the temperature (800 °C, 1100 °C, 1300 °C), the oxidation mechanisms vary, which is due to different reactions at the surface of the alloys accompanied with mass changes of samples. These mass changes can be explained on the basis of microstructural investigations. However, compared to a powder metallurgically processed Mo–9Si–8B alloy, the AM-DED alloy shows competitive oxidation performance at potential application temperatures of 1100 °C and 1300 °C, while a catastrophic materials degradation occurs at 800 °C as also observed in other Mo-rich Mo–Si–B alloys.

Influence of the Third Element on the High Temperature Oxidation Behavior of γ'-Ni3Al Alloys

2006 ◽  
Vol 522-523 ◽  
pp. 617-624 ◽  
Author(s):  
Shinya Mikuni ◽  
Shigenari Hayashi ◽  
Toshio Narita
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Al Alloys ◽  
Temperature Oxidation ◽  
The Third ◽  
Alloy Oxidation ◽  
Oxidation Performance ◽  
Fe Alloys ◽  
High Temperature Oxidation Behavior

The effects of the third element on the high temperature oxidation of γ'-Ni3Al with 5at%X (X=Ti, Ta, Nb, Cu, Co and Fe) alloys were investigated at 1173K in air, and oxidation behavior could be classified into three groups. The first group, comprised of alloys with Cu and Co, showed good oxidation performance with Al2O3 formation. A second group contains Ti, Ta, and Nb as alloying elements, and showed poor oxidation performance. With Fe or Mn addition the alloy oxidation performance was intermediate between the first and second group. The effects of these elements are discussed associate with partitioning factors for each element in the γ'-phase.

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

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.

Laser Metal Deposition Additive Manufacturing of TiC Reinforced Inconel 625 Composites: Influence of the Additive TiC Particle and Its Starting Size

2016 ◽  
Vol 139 (4) ◽  
Author(s):  
Dongdong Gu ◽  
Sainan Cao ◽  
Kaijie Lin
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Central Zone ◽  
Metal Deposition ◽  
Inconel 625 ◽  
Wear Property ◽  
Laser Metal Deposition ◽  
Inconel 625 Alloy ◽  
Tic Particle ◽  
Original Size

In this study, laser metal deposition (LMD) additive manufacturing was used to deposit the pure Inconel 625 alloy and the TiC/Inconel 625 composites with different starting sizes of TiC particles, respectively. The influence of the additive TiC particle and its original size on the constitutional phases, microstructural features, and mechanical properties of the LMD-processed parts was studied. The incorporation of TiC particles significantly changed the prominent texture of Ni–Cr matrix phase from (200) to (100). The bottom and side parts of each deposited track showed mostly the columnar dendrites, while the cellular dendrites were prevailing in the microstructure of the central zone of the deposited track. As the nano-TiC particles were added, more columnar dendrites were observed in the solidified molten pool. The incorporation of nano-TiC particles induced the formation of the significantly refined columnar dendrites with the secondary dendrite arms developed considerably well. With the micro-TiC particles added, the columnar dendrites were relatively coarsened and highly degenerated, with the secondary dendrite growth being entirely suppressed. The cellular dendrites were obviously refined by the additive TiC particles. When the nano-TiC particles were added to reinforce the Inconel 625, the significantly improved microhardness, tensile property, and wear property were obtained without sacrificing the ductility of the composites.

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