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Title: In-situ, microscale characterization of heterogeneous deformation around notch in martensitic Shape Memory Alloy

Abstract

Deformation characterization of low-symmetry phases such as martensite in SMAs is difficult due to a fine-scale hierarchical microstructure. With X-ray microLaue diffraction, in-situ deformation of martensite is examined in a notched NiTi specimen. The local deformation is influenced by the notch stress field, initial martensite microstructure, and interaction between notch stress field and the external load. The microstructure evolves heterogeneously and inelastically, with detwinning and twin nucleation occurring simultaneously through loading. These results contrast with the traditional view of martensite deformation that is partitioned in three distinct regimes: elasticity, reorientation and de-twinning.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Colorado School of Mines, Golden, CO (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Siberian Physical Technical Inst., Tomsk (Russia)
  5. Duke Univ., Durham, NC (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1580412
Grant/Contract Number:  
AC02-05CH11231; SC0010594
Resource Type:
Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 771; Journal Issue: C; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Nickel Titanium; Shape Memory Alloys; Martensite deformation; Microdiffraction; Notch deformation

Citation Formats

Paul, Partha P., Paranjape, Harshad M., Tamura, Nobumichi, Chumlyakov, Yuri I., and Brinson, L. Catherine. In-situ, microscale characterization of heterogeneous deformation around notch in martensitic Shape Memory Alloy. United States: N. p., 2019. Web. doi:10.1016/j.msea.2019.138605.
Paul, Partha P., Paranjape, Harshad M., Tamura, Nobumichi, Chumlyakov, Yuri I., & Brinson, L. Catherine. In-situ, microscale characterization of heterogeneous deformation around notch in martensitic Shape Memory Alloy. United States. doi:10.1016/j.msea.2019.138605.
Paul, Partha P., Paranjape, Harshad M., Tamura, Nobumichi, Chumlyakov, Yuri I., and Brinson, L. Catherine. Fri . "In-situ, microscale characterization of heterogeneous deformation around notch in martensitic Shape Memory Alloy". United States. doi:10.1016/j.msea.2019.138605.
@article{osti_1580412,
title = {In-situ, microscale characterization of heterogeneous deformation around notch in martensitic Shape Memory Alloy},
author = {Paul, Partha P. and Paranjape, Harshad M. and Tamura, Nobumichi and Chumlyakov, Yuri I. and Brinson, L. Catherine},
abstractNote = {Deformation characterization of low-symmetry phases such as martensite in SMAs is difficult due to a fine-scale hierarchical microstructure. With X-ray microLaue diffraction, in-situ deformation of martensite is examined in a notched NiTi specimen. The local deformation is influenced by the notch stress field, initial martensite microstructure, and interaction between notch stress field and the external load. The microstructure evolves heterogeneously and inelastically, with detwinning and twin nucleation occurring simultaneously through loading. These results contrast with the traditional view of martensite deformation that is partitioned in three distinct regimes: elasticity, reorientation and de-twinning.},
doi = {10.1016/j.msea.2019.138605},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = C,
volume = 771,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
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This content will become publicly available on November 1, 2020
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