Microscopic Deformation Mechanisms

Overview

Microscopic deformation mechanisms are critical for understanding how materials respond to stress at the micro level, influencing their overall mechanical properties. Micropillar tests allow for the direct observation of plastic deformation at such small-scale, enabling researchers to understand how dislocations interact with specific microstructural features. By isolating small-scale deformation, micropillar testing provides valuable information on the underlying mechanisms driving strengthening in different materials. This technique is especially useful for examining precipitate strengthening and grain boundary hardening, which are key mechanisms for improving material strength.

Representative Patent, Publications, and Presentations

2. Manufacturing method of micro-pillar aluminum alloy specimens for physical properties evaluation and micro-pillar aluminum alloy specimens for physical properties. (KOR)
Hyokyung Sung, Jae Bok Seol, Jung Gi Kim, Sangeun Park, Saif Haider Kayani, Je Hyun Lee.
Application No. 1020230034478. (2023)

- Experimental and crystal plasticity finite element study of the deformation behavior of high-Mn steel micropillars.
Sangyul Ha†, Saif Haider Kayani†, Kyungjun Lee, Sangeun Park, Jung Gi Kim, Jae Bok Seol, Hyokyung Sung
Steel Research International 94 (2023) 2200254.
DOI

- Microscopic-plastic deformation behavior of grain boundary precipitates in an Al-Zn-Mg alloy.
Sangyul Ha, Saif Haider Kayani, Kyungjun Lee, Suwon Park, Hyunjoo Choi, Jae Bok Seol, Jung Gi Kim, Hyokyung Sung
Journal of Materials Research and Technology 30 (2024) 3420-3429.
DOI