About the laboratory
The Fatigue and Plasticity Laboratory of Pohang University of Science and Technology is under the direction of professor Lee Chong Soo. This laboratory was founded in 1987. There are currently 14 members (1 post-doc, 6 students in doctoral program, 3 students in masters and 3 researchers) including the chief of the lab; 17 doctors and 41 masters have graduated from this lab. Most of the graduates of the lab are currently working at some of the major firms such as the national or provincial research center, POSCO, Samsung, LG and national universities. Most of the offices and lab equipments are located at the 3rd building of RIST (Research Institute of Industrial Science & Technology). Our lab consists of 4 offices for individual studies and 3 laboratories which are equipped with many technical and analytical machines that are used for the development of various new materials; structural steel, aerospace materials, light alloys etc.
Reaearch Area
Fatigue properties of advanced structural materials
  • - Study on the behavior of high and low cycle fatigue of advanced structural material
  • - Study on the deformation mechanisms and microstructural evolution during fatigue behavior
  • - Analysis on the effect of steel'¯s and nonferrous metals's microstructure on the fatigue behavior
  • - Prediction modeling for fatigue life considering the metallurgical and mechanical variables
Development of high-strengh and ductile steels
  • - Development of high strength and ductile steel frame through microstructural mapping
  • - Development of new TWIP steel using composite deformation mechanism
  • - Precipitates control of hyper-duplex stainless steel using alloying optimization
  • - Study on the optimum process design and microstructural design of HSLA steel through TMCP
  • - Study on the formability improvement and microstructural change of TRIP aided DP steel
Hydrogen delayed fracture of high-strengh steel
  • - Study on the fracture and declining mechanical property of materials due to hydrogen
  • - Study on the resistance of high performance wire rod of 2000MPa to hydrogen delayed fracture
  • - Study on the resistance of steel sheets of green cars to hydrogen delayed fracture
  • - Analysis of the hydrogen behavior in a high-strength stainless steel
  • - Analysis of the diffusion rate and trapping site of hydrogen
Plastic working of high-performance nonferrous metal
  • - Analysis of slip and twin behavior according to the texture of Mg alloy
  • - Study on the plasticity of hard-to-work HCP metal in room-temperature
  • - Study on the superplasticity and deformation mechanisms of aerial Ti alloys
  • - Enhancement of the mechanical compatibility and osteoblast response of biomedical metallic materials
Modeling of the mocrostructure and mechanocal properties
  • - Prediction for formability of the advanced structural materials using-FEM
  • - Prediction of the microstructure and mechanical property using ANN
  • - Prediction of the flow behavior and deformation mechanism of HCP metal using VPSC model
Biomaterieals fpr medical implants
  • - Development of high strength medical implant using microstructural design
  • - Study on medical implants with high fatigue performance
  • - Alloying and pore design to fabricate biomaterials with low elastic modulus
  • - Materialization for human-bone-mimetic implants using hybrid materials
Activities
Our lab is not only collaborating with local enterprises, universities and research centers but also working with universities and research centers in Japan, Europe and North America. Based on the database of various metal properties, we are focusing on the field of fatigue and plasticity. We are also taking part in the development of local industries by passing on some of the latest techniques to the local enterprises. We are aiming to become an international research center; our lab members are continuously participating in domestic and international conferences to keep up with the global flow and we are having various exchange programs.
Applications
The lab member's academic achievements and newly developed techniques from research projects are presented through domestic and international journals and conferences; we also contribute to the industrial development by applying for patents and teaching new techniques. We are applying the newly developed techniques to the fields such as aerospace, automobile, thermal and wind power generation, national defense, bionics and leisure.