Martensitic Transformation in a β-Type Mg–Sc Alloy

Yukiko Ogawa, Daisuke Ando, Yuji Sutou, Hidetoshi Somekawa, Junichi Koike

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Recently, we found that a Mg–Sc alloy with a bcc (β) phase exhibits superelasticity and a shape memory effect at low temperature. In this work, we examined the stress-induced and thermally induced martensitic transformation of the β-type Mg–Sc alloy and investigated the crystal structure of the thermally induced martensite phase based on in situ X-ray diffraction (XRD) measurements. The lattice constants of the martensite phase were calculated to be a = 0.3285 nm, b = 0.5544 nm, and c = 0.5223 nm when we assumed that the martensite phase has an orthorhombic structure (Cmcm). Based on the lattice correspondence between a bcc and an orthorhombic structures such as that in the case of β-Ti shape memory alloys, we estimated the transformation strain of the β Mg–Sc alloy. As a result, the transformation strains along the 001, 011, and 111 directions in the β phase were calculated to be + 5.7, + 8.8, and + 3.3%, respectively.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalShape Memory and Superelasticity
Volume4
Issue number1
DOIs
Publication statusPublished - 2018 Mar 1

Keywords

  • Martensite
  • Mg alloy
  • Transformation strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials

Fingerprint Dive into the research topics of 'Martensitic Transformation in a β-Type Mg–Sc Alloy'. Together they form a unique fingerprint.

  • Cite this