Transmission electron microscopy investigation of microstructures in low-hysteresis alloys with special lattice parameters

Rémi Delville, Dominique Schryvers, Zhiyong Zhang, Richard D. James

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

A sharp drop in hysteresis is observed for shape memory alloys satisfying the compatibility condition between austenite and martensite, i.e. λ2 = 1, where λ2 is the middle eigenvalue of the transformation strain matrix. The present work investigates the evolution of microstructure by transmission electron microscopy as the composition of the Ti50Ni50-xPdx system is systemically tuned to achieve the condition λ2 = 1. Changes in morphology, twinning density and twinning modes are reported along with twinless martensite and exact austenite-martensite interfaces.

Original languageEnglish (US)
Pages (from-to)293-296
Number of pages4
JournalScripta Materialia
Volume60
Issue number5
DOIs
StatePublished - Mar 1 2009

Keywords

  • Hysteresis
  • Martensitic phase transformation
  • Shape memory alloys (SMA)
  • Transmission electron microscopy (TEM)
  • Twinning

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