Amanda Giroux, Hetal Patel, and Leopoldo Valencia Jr. attended 2016 MS&T meeting at Utah. Amanda gave a poster presentation about her summer research on Superplasticity of ThCr2Si2-structured intermetallic compounds (This work was supported by NSF-REU program). Hetal participated in Mug Cup Drop contest. Leo participated in Geodome contest.

Leo is currently working on the development of Cu-based nanostructured alloys with enhanced strength and ductility with Jack Morley. Hetal is currently working on the measurement of temperature-dependent theoretical strength of metal using spherical nanoindentation. Amanda studied “Superplasticity of ThCr2Si2-structured intermetallic compounds” during the last summer.

Amanda met Chef Gordon Ramsay!!! Awesome!!!

Also, read the department news!

    

   

 

John Sypek won the first place in the poster competition of the SES (Society of Engineering Science) 2016 – 53^rd Annual Technical Meeting at University of Maryland, College Park, MD. The SES meeting is one of the biggest ‘Mechanics’ conferences in USA.

John Sypek gave a poster presentation entitled “Superelasticity and one-dimensional cryogenic shape memory effects of novel intermetallic compound CaFe₂As₂ at small length scales,” on October 4^th. Many Congratulations!

 

Keith, John, and Seok-Woo attended the SES 2016 (Society of Engineering Science) – 53rd annual technical meeting at University of Maryland, College Park, MD.

Keith Dusoe presented a talk entitled “Ultra-high elastic strain energy storage in AlO_x-infiltrated SU-8 photoresist nanopillars,” on October 3^rd, and a talk and poster presentation entitled “In-situ compression of solution-grown crystalline superelastic materials: ThCr₂Si₂-structured novel intermetallic compounds,” on October 4^th.

John Sypek presented a talk and poster presentation entitled “Superelasticity and one-dimensional cryogenic shape memory effects of novel intermetallic compound CaFe₂As₂ at small length scales,” on October 3^rd and 4^th, respectively.

 

     

Seok-Woo receives 2016 NASA Early Career Faculty Award!

The official announcement is available at the NASA website, and the brief project description is available here.

This news is featured at ExecutiveBiz, and UConn MSE homepage.

Seok-Woo attended WCCM 2016 at Seoul, Korea on July 24-29. Seok-Woo chaired the session of “Computational Modeling of Dislocation Behaviors”, and gave a talk entitled “Cold-Temperature Deformation of Nano-Sized Tungsten and Niobium as Revealed by Dislocation Dynamics”.

Seok-Woo Lee, Yingtong Cheng, Julia R. Greer,”Cold-Temperature Deformation of Nano-Sized Tungsten and Niobium as Revealed by Dislocation Dynamics”

Lee’s group attended the Gordon Research Conference – Thin Films and Small Scale Mechanical Behavior at Bates College, ME (July 24-29, 2016). Four posters were presented by PhD students (Keith, John, Gyuho, and Tyler).

Keith J. Dusoe,  Aaron Stein, Chang-Yong Nam, Seok-Woo Lee – “Ultra-high elastic energy storage in AlOx-infiltrated SU-8 nanopillars”

John T. Sypek, Hang Yu, Hetal Patal, Paul C. Canfield, Sergey Bud’ko, Christopher R. Weinberger,  Seok-Woo Lee – “Superelasticity and one-dimensional cryogenic shape memory effects of novel intermetallic compound CaFe2As2 at small length scales”

Gyuho Song, Tai Kong, Paul C. Canfield, Seok-Woo Lee – “Synthesis of bulk single-crystalline quasicrystal approximant YCd6 and its small scale mechanical behavior”

Tyler J. Flanagan, Oleg Kovalenko, Eugen Rabkin, Seok-Woo Lee – “Controlling the strength of mobile-dislocation-free gold microparticles via microstructure and surface-structure modification”

Seok-Woo receives UConn Research Excellence Program Award. The proposal title is “Giant Pseudo-elasticity of High Temperature Superconductor CaFe2As2”

Jake, Andrew, Leo and Jack will work on Ni-based and Cu-based metal-intermetallic nanostructured composite for this summer in my laboratory. Welcome all!

Roman Kositski, Oleg Kovalenko, Seok-Woo Lee, Julia R. Greer, Eugen Rabkin, Dan Mordehai, “Cross-split of dislocations: an athermal and rapid plasticity mechanism,”Nature Scientific Report 2 25966 (2016) – [link].

 

[Abstract]: The pathways by which dislocations, line defects within the lattice structure, overcome microstructural obstacles represent a key aspect in understanding the main mechanisms that control mechanical properties of ductile crystalline materials. While edge dislocations were believed to change their glide plane only by a slow, non-conservative, thermally activated motion, we suggest the existence of a rapid conservative athermal mechanism, by which the arrested edge dislocations split into two other edge dislocations that glide on two different crystallographic planes. This discovered mechanism, for which we coined a term “cross-split of edge dislocations”, is a unique and collective phenomenon, which is triggered by an interaction with another same-sign pre-existing edge dislocation. This mechanism is demonstrated for faceted α-Fe nanoparticles under compression, in which we propose that cross-split of arrested edge dislocations is resulting in a strain burst. The cross-split mechanism provides an efficient pathway for edge dislocations to overcome planar obstacles.

 

Lee’s Capstone Senior Design Team (Michael McGeever, Jeremy Higgins and Amy Hernadez) won the second place ($1,000) in the MSE final Capstone presentation! I am very proud of their achievement over the year! The title of the project was “Reliable rapid repair using additive manufacturing (sponsored by Sikorsky).”

 

(From left to right: Jeremy, Mike, and Amy)