skip to main content

SciTech ConnectSciTech Connect

Title: Premartensite transition in Ni{sub 2}FeGa Heusler alloy

Martensitic phase transformation of Ni{sub 2}FeGa Heusler alloy was studied by differential scanning calorimetry. Atomic ordering induced in the austenite structure by quenching from high temperature plays a significant role on martensitic phase transformation. Higher magnetization and larger magneto-crystalline anisotropy of martensite phase than that of austenite phase are noticed. Tweed contrast regions observed in the transmission electron microscopy were correlated to premartensite phenomena. A shift in premartensitic transition temperature prior to martensitic transformation as measured by differential scanning calorimetry is being reported for the first time in this system. - Highlights: • Atomic ordering influences martensitic transformation in Ni{sub 2}FeGa Heusler alloy. • Observation of tweed contrast in TEM was correlated to premartensite phenomena. • For the first time the shift in premartensite peak was observed in DSC.
Authors:
 [1] ;  [2] ;  [1]
  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036 (India)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
22476067
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 102; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; AUSTENITE; CALORIMETRY; GALLIUM COMPOUNDS; HEUSLER ALLOYS; IRON COMPOUNDS; MAGNETIZATION; MARTENSITE; MARTENSITIC STEELS; NICKEL COMPOUNDS; PHASE TRANSFORMATIONS; QUENCHING; TERNARY ALLOY SYSTEMS; TRANSFORMATIONS; TRANSITION TEMPERATURE; TRANSMISSION ELECTRON MICROSCOPY