ECI Digital Archives

Title

A new type of superelastic and shape memory materials: ThCr2Si2- structured novel intermetallic compounds at small length scales

Authors

Seok-Woo Lee, University of Connecticut, USAFollow
John T. Sypek, University of Connecticut, USA
Keith J. Dusoe, University of Connecticut, USA
Hetal Patel, University of Connecticut, USA
Amanda M. Giroux, University of Connecticut, USA
Hang Yu, Mechanical Engineering, Drexel University, USA
Alan I. Goldman, Ames Laboratory, USA
Sergey L. Bud'ko, Ames Laboratory, USA
Andreas Kreyssig, Ames Laboratory, USA
Paul C. Canfield, Physics and Astronomy, Iowa State University, USA
Christopher R. Weinberger, Mechanical Engineering, Colorado State University, USA

Conference Dates

October 1-6, 2017

Abstract

Crystalline, superelastic materials typically exhibit large recoverable strains due to the ability of the material to undergo a reversible phase transition between martensite and austenite phases. Applicable to various alloys, ceramics and intermetallic compounds, this reversible transition serves as a general mechanism for superelasticity and shape memory effect. Recently, we noticed that ThCr₂Si₂-structured intermetallic compounds exhibit a reversible phase transition between a tetragonal (or orthorhombic) phase to a collapsed tetragonal phase under compression along c-axis of the unit cell by making and breaking Si-Si type bonds. This process has nothing to do with martensitic transformation. This unique reversible phase transformation process motivated us to investigate their potential as a superelastic and shape memory material.

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Recommended Citation

Seok-Woo Lee, John T. Sypek, Keith J. Dusoe, Hetal Patel, Amanda M. Giroux, Hang Yu, Alan I. Goldman, Sergey L. Bud'ko, Andreas Kreyssig, Paul C. Canfield, and Christopher R. Weinberger, "A new type of superelastic and shape memory materials: ThCr2Si2- structured novel intermetallic compounds at small length scales" in "Nanomechanical Testing in Materials Research and Development VI", Karsten Durst, Technical University of Darmstadt, Germany Eds, ECI Symposium Series, (2017). https://dc.engconfintl.org/nanomechtest_vi/83