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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Elements Alloys X: Alloy Development and Properties
Presentation Title Ultrafast Multilayer Combustion Synthesis of B2 Single Phase AlCoCrFeNi High Entropy Alloy Films Using Reactive Al/Ni Multilayer as Heat Source
Author(s) Anni Wang, Isabella Gallino, Sascha Sebastian Riegler, Yi-Ting Lin, Nishchay Angel Isaac, Yesenia Haydee Sauni Camposano, Sebastian Matthes, Dominik Flock, Heiko O Jacobs, Hung-Wei Yen, Peter Schaaf
On-Site Speaker (Planned) Isabella Gallino
Abstract Scope We present here a new method to produce ultrafine single B2 phase high-entropy alloy films (HEAF) with equiatomic AlCoCrFeNi composition [1]. The method consists of stacking three multilayer thin films together, i.e., two Al/Ni films (Ni/Al units) between a CrNi/Al/CoFe (HEAF units) film. A fast scanning calorimetry (FSC) study revealed that when this triple stack Al/Ni–HEAF–Ni/Al composite is heated using flash rates in the order of 10,000 K/s a thermal explosion occurs at 700 K, forming an homogeneous single B2 phase. This reaction resembles the thermal explosion that is typically observed in electrical sparks ignited films, where the multistep phase sequence that is observed during slow annealing is kinetically suppressed altogether. A detailed kinetic analysis provided values for the activation energies of the exothermic reaction evolution. [1] A. Wang et al., Materials & Design 206 (2021)109790.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Thin Films and Interfaces,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Gradient Cell Structured High-entropy Alloy with Superior Mechanical Behavior
Heterogeneous Ultrafine Grain Formation by Severe Plastic Deformation in CrMnFeCoNi HEAs
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Hydrogen Storage Characteristics of Multi-principal Element Alloys and Composites
Improved Properties of Non-equiatomic MnFeCoNiCu HEA Compared to Its Equiatomic Counterpart
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Mapping Processibility in the Family of Additive Manufacturing for MPEAs
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Microalloying Technology: A Promising Strategy for Design of Nanocrystalline High-entropy Alloy Films
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Multi-principal Elements Alloys as Filler Metals for Similar and Dissimilar Joining Applications
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Oxidation Characteristic of Complex Concentrated Alloys FeAlCrV and FeAlCrMo
Plastic Deformation and Defect Recovery of NiTi-based B2-phase High-entropy Intermetallic Compounds
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Shear Instabilities of BCC Refractory High Entropy Alloys
Small-scale Deformation Behavior of Multi-principal Element Alloys
Solidification Behavior and Mechanical Performance of Ductile Mn35Fe5Co20Ni20Cu20 MPEA Brazing Filler
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Strengthening in HEAs by Solute-solute Interactions and Short-range-order
Strengthening Mechanisms and Deformation Behaviors in Single BCC Phase Refractory High-entropy Alloys
Study of the Nitriding Behavior of an Austenitic High Entropy Alloy Powder
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Thermal and Irradiation-induced Grain Growth in Nanocrystalline High-entropy Alloys
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