About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Microstructural Investigation of Strained Aluminum with External Electrical Pulses by Using an Electrical-Straining Stage in TEM |
Author(s) |
Youngwoon Kim, Seok-Yong Hong, Mingzhe Li, Jin-Wook Kim |
On-Site Speaker (Planned) |
Youngwoon Kim |
Abstract Scope |
The electro-forming process is an effective method to fabricate high-strength materials of complex design. An electrical pulse signal was applied in the strained aluminum sample to observe the microstructural change by applying the external electrical pulses using a homemade in-situ electro-straining stage in TEM. Pulse widths of 50 – 500 msec were applied with current density up to 95 A/(square mm). External pulse shoots up the foil temperature to 30 degC after 7 pulses and gradually increases the maximum peak temperature of the TEM sample up to 280 degC, and then it quickly cools down to base temperature, which gradually increases with pulses. The microstructural change in the bulk region and close to the crack tip was compared before and after the pulse imposed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Aluminum |