Title: A simple variant selection in stress-driven martensitic transformation

Abstract

The research of orientation variant selection helps to reveal the mechanism and dynamic process of martensitic transformations driven by temperature or pressure/stress. This is challenging due to the multiple variants which may coexist. While effects of temperature and microstructure in many martensitic transformations have been studied in detail, effects of stress and pressure are much less understood. Here, an in situ variant selection study of Mn₂O₃across the cubic-to-orthorhombic martensitic transformation explores orientation variants at pressures up to 51.5 GPa and stresses up to 5.5 GPa, using diamond anvil cells in radial geometry with synchrotron X-ray diffraction. The diamonds not only exert pressure but also impose stress and cause plastic deformation and texture development. The crystal orientation changes were followed in situ and a {110}_c ⟨001⟩_c// (100)_o⟨010⟩_orelationship was observed. Only the {110}_cplane perpendicular to the stress direction was selected to become (100)_o, ending in a very strong texture of the orthorhombic phase. Contrary to most other martensitic transformations, this study reveals a clear and simple variant selection that is attributed to structural distortions under pressure and stress.

Authors:

Yue, Binbin ^[1]; Hong, Fang ^[2]; Hirao, Naohisa ^[3]; Vasin, Roman  ^[4];

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Wenk, Hans-Rudolf ^[5]; Chen, Bin ^[6]; Mao, Ho-Kwang ^[6]

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1. Center for High Pressure Science and Technology Advanced Research, Pudong, 201203 Shanghai, People’s Republic of China,, The Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Earth and Planetary Science, University of California, Berkeley, CA 94720,
2. Center for High Pressure Science and Technology Advanced Research, Pudong, 201203 Shanghai, People’s Republic of China,, The Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
3. SPring-8, Japan Synchrotron Radiation Research Institute, Sayo-gun, 679-5198 Hyogo, Japan,
4. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
5. Department of Earth and Planetary Science, University of California, Berkeley, CA 94720,
6. Center for High Pressure Science and Technology Advanced Research, Pudong, 201203 Shanghai, People’s Republic of China,

Publication Date:

2019-07-10

Research Org.:

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:

1532817

Alternate Identifier(s):

OSTI ID: 1561934

Grant/Contract Number:  

FG02-05ER15637; AC02-05CH11231

Resource Type:

Published Article

Journal Name:

Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:

Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 116 Journal Issue: 30; Journal ID: ISSN 0027-8424

Publisher:

Proceedings of the National Academy of Sciences

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING; martensitic transformations; variant selection; high pressure; oxide; radial diffraction