About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Local Strain Analysis by 4D-STEM on Zr50Cu40Al10 Subjected to High Pressure Torsion |
Author(s) |
Katsuaki Nakazawa, Sangmin Lee, Kazutaka Mitsuishi, Shinji Kohara, Koichi Tsuchiya |
On-Site Speaker (Planned) |
Katsuaki Nakazawa |
Abstract Scope |
Although bulk metallic glasses (BMG) have superior properties to crystalline metals such as high strength and high corrosion resistance, shear localization during straining limits the area of application of BMGs. Structural rejuvenation by high pressure torsion (HPT) can suppress the shear band formation and may lead to improved plastic deformability. However, details of the local atomic structure in rejuvenated BMG have not been clarified yet.
We used 4D-STEM to characterize a change in local atomic structures caused by HPT in Zr50Cu40Al10 BMG. The local strain was measured from the diffraction patterns obtained by a convergent electron beam. We obtained a localized strain map by scanning the convergent electron beam and recording diffractions from all the scanning points. It was revealed that HPT induced anisotropic strain in BMG. |
Proceedings Inclusion? |
Planned: |