Special Features of L21L10 Thermoelastic Martensitic Transformations in Ni54Fe19Ga27 Single Crystals in Tension


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

Special features of L21–(14М)–L10 martensitic transformations (MT) are experimentally established for [001]-oriented Ni54Fe19Ga27 (аt.%) single crystals under tensile stress, including staging of superelasticity curves, stress hysteresis, and strain level of martensite formation depending on the test temperature and MT sequence. An additional stage of inelastic strain with high strain hardening coefficient and a stress drop arise on the σ(ε) curves in the interval of changes of the stress-induced MT sequence from L21–14M–L10 to L21–L10 (320–400 K) at superelasticity (SE). Special features and physical reasons of this stage and of the stress drop related with the processes of origin and detwinning of L10 martensite during stress-induced L21–L10 transformation are established. The stage of inelastic strain and the stress drop are absent at the L21–14М–L10 MT in the [001]-oriented single crystals or at the L21–L10 MT at other orientations, where detwinning of L10 martensite is suppressed by geometrical reasons.

About the authors

E. E. Timofeeva

V. D. Kuznetsov Physical-Technical Institute at Tomsk State University

Author for correspondence.
Email: katie@sibmail.com
Russian Federation, Tomsk

E. Yu. Panchenko

V. D. Kuznetsov Physical-Technical Institute at Tomsk State University

Email: katie@sibmail.com
Russian Federation, Tomsk

Yu. I. Chumlyakov

V. D. Kuznetsov Physical-Technical Institute at Tomsk State University

Email: katie@sibmail.com
Russian Federation, Tomsk

A. I. Tagil’tsev

V. D. Kuznetsov Physical-Technical Institute at Tomsk State University

Email: katie@sibmail.com
Russian Federation, Tomsk

V. A. Kirillov

V. D. Kuznetsov Physical-Technical Institute at Tomsk State University

Email: katie@sibmail.com
Russian Federation, Tomsk

H. J. Maier

Institut für Werkstoffkunde, Leibniz Universität Hannover

Email: katie@sibmail.com
Germany, Garbsen

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature