나노/마이크로 역학 특성 연구실에서는 나노 및 마이크로 수준의 크기에서 일어나는 다양한 재료의 기계적 거동에 대하여 분석하는 연구를 진행하고 있습니다. 해외 첨단 연구 선도국가들의 경우를 살펴보면, 제조 및 구동 시 미세 파손 등에 기인한 소재/디바이스의 성능/ 신뢰성 저하 문제와 그에 따른 경제적 손실의 최소화를 위하여 나노/ 마이크로 스케일 변형 및 파괴에 대해 많은 연구가 진행됨을 알 수 있습니다. 본 연구실에서도 이러한 세계적 추세에 맞추어, 금속, 반도체, 세라믹 등 고전적인 소재뿐만 아니라, 나노소재, 비정질, 폴리머, 박막시스템, MEMS 구조물 등의 다양한 신소재/디바이스가 나노/마이크로 스케일에서 나타내는 미세 변형, 파괴 응력 유기 상변태 등의 현상에 대한 연구를 활발히 수행하고 있습니다.

 

Current research efforts include:

Multi-scale analysis of mechanical behavior (deformation and fracture)
Instrumented macro-, micro-, and nano-indetation
Nano-mechanical behavior of nanostructured materials and bulk metallic glasses
Nano-machining/nano-precision and nano-imprinting/nano-patterning
Nano-mechanics of nano-wires, nano-belts, and nano-tubes
Materials for hydrogen storage and transmission
Time-dependent (creep) behavior in solids
Thin film mechanics
Fracture/ Damage mechanis for structural Integrity evaluation and lifetime prediction
Fitness-for-service assessment of welded structures

 

Our research funding comes from a variety of sources, including:

Korea Research Foundation (KRF)
POSCO
Korea Gas Corporation (KOGAS)
Reserch Institute of Industrial Science & Technology (RIST)
Hyundai Steel
Korea Science and Engineering Foundation (KOSEF)
Korean Institute of Energy and Resources Technology Evaluation and Planning (KETEP)

 

 

 

 

 

 

Research Area

 

The Nano/ Micro Mechanical Behavior Laboratory has developed both experimental and theoretical approaches towards the better understanding of the small scale (especially micro- or nano-level) mechanical behaviors of materials. Our group has developed a variety of new applications for the instrumented micro / nano indentation technique, and has also investigated nano-scale deformation, phase transformation and cracking of semiconductoturs, metals, ceramics, polymers, glasses, etc

 

Current research efforts include:

 

Multi-scale analysis of mechanical behavior (deformation and fracture)

Instrumented macro-, micro-, and nano-indetation

Nano-mechanical behavior of nanostructured materials and bulk metallic glasses

Nano-machining/nano-precision and nano-imprinting/nano-patterning

Nano-mechanics of nano-wires, nano-belts, and nano-tubes

Materials for hydrogen storage and transmission

Time-dependent (creep) behavior in solids

Thin film mechanics

Fracture/ Damage mechanis for structural Integrity evaluation and lifetime prediction

Fitness-for-service assessment of welded structures

J.-K. Han, D.K. Han, G.Y. Liang, J.-i. Jang, T.G. Langdon, M. Kawasaki
Direct bonding of aluminum-copper metals through high-pressure torsion processing
Advanced Engineering Materials, 2018, Vol. 20, No. 1800642, pp. 0~ 0

G. Yang, Y. Zhao, D.-H. Lee, J.-M Park, M.-Y. Seok, J.-Y. Suh, U. Ramamurty, J.-i. Jang
Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
Scripta Materialia, 2019, Vol. 161, No. 0, pp. 23~ 27

D.-H. Lee, J.-M Park, G. Yang, J. He, Z. Lu, J.-Y. Suh, M. Kawasaki, U. Ramamurty, J.-i. Jang
Nano-graining a particle-strengthened high-entropy alloy
Scripta Materialia, 2019, Vol. 163, No. 0, pp. 24~ 28

D.-H. Lee, I.-C. Choi, G. Yang, Z. Lu, M. Kawasaki, U. Ramamurty, R. Schwaiger, J.-i. Jang
Activation energy for plastic flow in nanocrystalline CoCrFeMnNi high-entropy alloy: A high temperature nanoindentation study
Scripta Materialia, 2018, Vol. 156, No. 0, pp. 129~ 133