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Bonding to Bulk Metallic Glass Using Aerospace-Grade Structural Adhesive


Title: Bonding to Bulk Metallic Glass Using Aerospace-Grade Structural Adhesive

Authors: Rose Roberts, Elizabeth Kidd, Evan Hilgemann and Giles Dillingham

DOI: 10.33599/nasampe/s.20.0224

Abstract: Bulk metallic glasses, also known as amorphous metals (AMs) are non-crystalline metals with growing applications in aerospace. Due to their amorphous nature, AMs generally exhibit stronger mechanical properties than most crystalline alloys and are more corrosion resistant. The limited reactivity of a corrosion resistant surface may explain the difficulty in establishing robust bonds to certain adhesives, especially commonly used structural adhesives for aerospace applications. Here, an amine cured aerospace adhesive was used for bonding an iron-nickel based AM satellite component. Various types of processes were explored to avoid adhesive failure and increase bond strength. It was found that the AM required specific chemical derivatization of the metal surface in order to achieve cohesive failure using the epoxy adhesive. Surface analysis was used to determine the mechanisms of adhesion enhancement. This work helps explain the difficulties in bonding AM materials and provides strategies for design of future bonded AM components.

References: 1. “Developing Starshade Technology to Image Earthsized Exoplanets around Neighboring Stars.” United States. National Aeronautics and Space Administration. 2017 Science Mission Directorate: Technology Highlights Washing, D.C.: GPO, 2017. 2. Diegle, Ronald B. “Chemical Properties of Metallic Glasses.” Journal of Non-Crystalline Solids 61&62 (1984): 601-612. 3. Jafary-Zadeh, Mehdi; Kumar, Gideon P.; Branicio, Paulo S.; Seifi, Mohsen; Lewandowski, John J.; and Cui, Fangsen. “A Critical Review on Metallic Glasses as Structural Materials for Cardiovascular Stent Applications.” Journal of Functional Biomaterials 9(19) (2018). DOI:10.3390/jfb9010019 4. Steeves, John; Martin, Stefan; Webb, David; Lisman, Douglas; Shaklan, Stuart. “Precision Optical Edges for a Starshade External Occulter.” Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II. Edinburgh, UK, 22 July 2016. Proc. SPIE 9912. Paper. DOI: 10.1117/12.2233409 5. Hilgemann, Evan; McKeithen, Dylan; Saltarelli, Nicholas; Ferguson, Maxwell; Steeves, John; Webb, David; Shaklan, Stuart; Martin, Stefan; and Lisman, Douglas. “Advancements in precision edges for a starshade external occulter.” Optical Engineering + Applications. San Diego, California, United States, 9 September 2019. Proc. SPIE 11117. Paper and presentation. DOI: 10.1117/12.2530160 6. “Safety Data Sheet: LOCTITE EA 9394 Aero Part A.” Henkel (2018). 7. “Safety Data Sheet: LOCTITE EA 9394 Aero Part B.” Henkel (2018). 8. Shen, P.; Fujii, H.; Nogi, K. “Effect of substrate crystallographic orientation on wettability and adhesion in several representative systems.” Journal of Materials Processing Technology 155-156 (2004): 1256-1260. DOI:10.1016/j.jmatprotec.2004.04.212 9. Abbott, Steven. Adhesion Science: Principles and Practice. Lancaster, Pennsylvania: DEStech Publications, Inc., 2015. 10. Li, Qian; Batra, Romesh C.; Graham, Ian; Dillard, David A. “Examining T-peel specimen bond length effects: Experimental and numerical explorations of transitions to steady-state debonding.” International Journal of Solids and Structures 180-181 (2019): 72-83. DOI: 10.1016/j.ijsolstr.2019.07.012

Conference: SAMPE 2020 | Virtual Series

Publication Date: 2020/06/01

SKU: TP20-0000000224

Pages: 15

Price: FREE

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