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Title: On the fast kinetics of B2–L2 1 ordering in Ni-Co-Mn-In metamagnetic shape memory alloys

Abstract

B2–L2 1 configurational order resulting from thermal processing of Ni-Co-Mn-In Heusler alloys is one of the main factors defining the characteristics of the martensitic transformation experienced by these alloys. While the effects of the quenched-in disorder on the martensitic transformation have been extensively investigated, the kinetics of the ordering process is not well known and mostly inferred from the indirect results such as the dependence of the martensitic transformation or magnetic transition temperatures to thermal processing. However, recent results suggested that the kinetics of B2– L2 1 ordering could have a more significant role than expected in the final state of the material and its functional properties. In the current work, an attempt has been made to investigate the kinetics of B2–L2 1 ordering in order to evaluate the dependence of the quenched-in disorder on the different variables of the thermal procedures. Results showed that ordering rate has a strong dependence on annealing temperature. Below 600 K, slow kinetics is forcing the crystal to always contain a certain amount of quenched-in disorder at room temperature. Between 600 K and 750 K, kinetics is fast enough to reach thermal equilibrium state within tens of minutes during the annealing process. Above 750more » K, kinetics is very fast and thermal equilibrium can be reached during heating, so no isothermal holding is required. Furthermore, these predictions have been confirmed using differential scanning calorimetry and in-situ high-energy X-Ray diffraction measurements for non-direct estimations of the degree of order.« less

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [2]; ORCiD logo [1];  [3];  [4]; ORCiD logo [1]; ORCiD logo [1]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Tomsk State Univ., Tomsk (Russia)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE
OSTI Identifier:
1524219
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 781; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
first-principles calculations; meta-magnetic shape memory alloys; order/disorder kinetics; vacancy evolution; Martensitic transformation

Citation Formats

Wang, Yuhao, Salas, Daniel, Duong, Thien C., Medasani, Bharat, Talapatra, Anjana, Ren, Yang, Chumlyakov, Yuriy I., Karaman, Ibrahim, and Arróyave, Raymundo. On the fast kinetics of B2–L21 ordering in Ni-Co-Mn-In metamagnetic shape memory alloys. United States: N. p., 2018. Web. doi:10.1016/j.jallcom.2018.12.034.
Wang, Yuhao, Salas, Daniel, Duong, Thien C., Medasani, Bharat, Talapatra, Anjana, Ren, Yang, Chumlyakov, Yuriy I., Karaman, Ibrahim, & Arróyave, Raymundo. On the fast kinetics of B2–L21 ordering in Ni-Co-Mn-In metamagnetic shape memory alloys. United States. doi:10.1016/j.jallcom.2018.12.034.
Wang, Yuhao, Salas, Daniel, Duong, Thien C., Medasani, Bharat, Talapatra, Anjana, Ren, Yang, Chumlyakov, Yuriy I., Karaman, Ibrahim, and Arróyave, Raymundo. Sat . "On the fast kinetics of B2–L21 ordering in Ni-Co-Mn-In metamagnetic shape memory alloys". United States. doi:10.1016/j.jallcom.2018.12.034. https://www.osti.gov/servlets/purl/1524219.
@article{osti_1524219,
title = {On the fast kinetics of B2–L21 ordering in Ni-Co-Mn-In metamagnetic shape memory alloys},
author = {Wang, Yuhao and Salas, Daniel and Duong, Thien C. and Medasani, Bharat and Talapatra, Anjana and Ren, Yang and Chumlyakov, Yuriy I. and Karaman, Ibrahim and Arróyave, Raymundo},
abstractNote = {B2–L21 configurational order resulting from thermal processing of Ni-Co-Mn-In Heusler alloys is one of the main factors defining the characteristics of the martensitic transformation experienced by these alloys. While the effects of the quenched-in disorder on the martensitic transformation have been extensively investigated, the kinetics of the ordering process is not well known and mostly inferred from the indirect results such as the dependence of the martensitic transformation or magnetic transition temperatures to thermal processing. However, recent results suggested that the kinetics of B2–L21 ordering could have a more significant role than expected in the final state of the material and its functional properties. In the current work, an attempt has been made to investigate the kinetics of B2–L21 ordering in order to evaluate the dependence of the quenched-in disorder on the different variables of the thermal procedures. Results showed that ordering rate has a strong dependence on annealing temperature. Below 600 K, slow kinetics is forcing the crystal to always contain a certain amount of quenched-in disorder at room temperature. Between 600 K and 750 K, kinetics is fast enough to reach thermal equilibrium state within tens of minutes during the annealing process. Above 750 K, kinetics is very fast and thermal equilibrium can be reached during heating, so no isothermal holding is required. Furthermore, these predictions have been confirmed using differential scanning calorimetry and in-situ high-energy X-Ray diffraction measurements for non-direct estimations of the degree of order.},
doi = {10.1016/j.jallcom.2018.12.034},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 781,
place = {United States},
year = {2018},
month = {12}
}

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