Skip to main content

6 Result(s)

within Article Remove this filter Yoon-Uk Heo Remove this filter Materials Science Remove this filter Nanotechnology Remove this filter

and

  1. No Access

    Article

    Determination of Yield Stress in a Duplex Steel with α + γ Lamellar Structure

    Yield stress σy is evaluated in a duplex steel with α + γ lamellar structure by calculating the stress for the propagation of pile-up dislocations in one phase into another phase. Effective grain size of a lamell...

    Yoon-Uk Heo, Joo-Hee Kang, Nam Hoe Heo… in Metallurgical and Materials Transactions A (2019)

  2. No Access

    Article

    Deformation Behavior in Medium Mn Steel of Nanometer-Sized α′ + γ Lamellar Structure

    Yielding and work-hardening phenomena in an Fe-10.62Mn-2.84Al-0.17C-0.5Mo steel, which is composed of nanometer-sized lamellae of α′ and γ, are described on the basis of the Hall–Petch relations. Unlike the gener...

    Yoon-Uk Heo, Dong Hwi Kim, Nam Hoe Heo… in Metallurgical and Materials Transactions A (2016)

  3. No Access

    Article

    Influence of the Initial Microstructure on the Reverse Transformation Kinetics and Microstructural Evolution in Transformation-Induced Plasticity–Assisted Steel

    The reverse transformation behavior upon heating to intercritical temperature was studied in Fe-0.21C-2.2Mn-1.5Si (wt pct) alloy with three initial microstructures. One is the cold-rolled (CR) structure and t...

    Jeong In Kim, Joo Hyun Ryu, Sea Woong Lee… in Metallurgical and Materials Transactions A (2016)

  4. No Access

    Article

    Controlled Ag-driven superior rate-capability of Li4Ti5O12 anodes for lithium rechargeable batteries

    The morphology and electronic structure of a Li4Ti5O12 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag-Li4Ti5O12 nanofibers have been rationally de...

    Jae-Geun Kim, Dongqi Shi, Min-Sik Park, Goo** Jeong, Yoon-Uk Heo… in Nano Research (2013)

  5. No Access

    Article

    Precipitates and Grain Boundary Strength of an Fe-Mn-Ni Alloy

    The effect of grain boundary (GB) precipitates on the GB strength of an age-hardened Fe-7.8Mn-8.2Ni alloy was investigated. Premature intergranular fracture was observed after age hardening due to the precipit...

    Yoon-Uk Heo, Jae Hoon Jang, Hu-Chul Lee in Metallurgical and Materials Transactions A (2012)

  6. No Access

    Article

    Influence of Silicon in Low Density Fe-C-Mn-Al Steel

    The influence of silicon on the microstructure of a Fe-Mn-Al-C ferritic low-density steel is investigated. The formation of κ-carbide, which is known to be detrimental to ductility, can be suppressed by decrea...

    Yoon-Uk Heo, You-Young Song, Seong-Jun Park… in Metallurgical and Materials Transactions A (2012)