Application of a bi-stable chain model for the analysis of jerky twin boundary motion in NiMnGa

Itamar Benichou; Eilon Faran; Doron Shilo; Sefi Givli

doi:10.1063/1.4773995

Application of a bi-stable chain model for the analysis of jerky twin boundary motion in NiMnGa

Itamar Benichou, Eilon Faran, Doron Shilo, Sefi Givli

Mechanical Engineering

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

The "jerky" motion of a twin boundary in the ferromagnetic shape memory alloy NiMnGa is studied experimentally and theoretically. We employ a bi-stable chain model in order to interpret macroscopic stress-strain experiments and extract important micro-level properties. The analysis reveals the existence of a periodic barrier for type I twin boundary motion with an average distance of 19 μm and amplitude of 0.16 J/m². Further, we show that the macroscopic mechanical response depends on the length of the crystal and predict a significant decrease of the hysteresis in sub-mm length specimens.

Original language	English
Article number	011912
Journal	Applied Physics Letters
Volume	102
Issue number	1
DOIs	https://doi.org/10.1063/1.4773995
State	Published - 7 Jan 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4773995

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title = "Application of a bi-stable chain model for the analysis of jerky twin boundary motion in NiMnGa",

abstract = "The {"}jerky{"} motion of a twin boundary in the ferromagnetic shape memory alloy NiMnGa is studied experimentally and theoretically. We employ a bi-stable chain model in order to interpret macroscopic stress-strain experiments and extract important micro-level properties. The analysis reveals the existence of a periodic barrier for type I twin boundary motion with an average distance of 19 μm and amplitude of 0.16 J/m2. Further, we show that the macroscopic mechanical response depends on the length of the crystal and predict a significant decrease of the hysteresis in sub-mm length specimens.",

author = "Itamar Benichou and Eilon Faran and Doron Shilo and Sefi Givli",

note = "Funding Information: This work was supported by the Israel Science Foundation, Grant Nos. ISF 1341/10 and ISF 1500/10.",

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AU - Benichou, Itamar

AU - Faran, Eilon

AU - Shilo, Doron

AU - Givli, Sefi

N1 - Funding Information: This work was supported by the Israel Science Foundation, Grant Nos. ISF 1341/10 and ISF 1500/10.

PY - 2013/1/7

Y1 - 2013/1/7

N2 - The "jerky" motion of a twin boundary in the ferromagnetic shape memory alloy NiMnGa is studied experimentally and theoretically. We employ a bi-stable chain model in order to interpret macroscopic stress-strain experiments and extract important micro-level properties. The analysis reveals the existence of a periodic barrier for type I twin boundary motion with an average distance of 19 μm and amplitude of 0.16 J/m2. Further, we show that the macroscopic mechanical response depends on the length of the crystal and predict a significant decrease of the hysteresis in sub-mm length specimens.

AB - The "jerky" motion of a twin boundary in the ferromagnetic shape memory alloy NiMnGa is studied experimentally and theoretically. We employ a bi-stable chain model in order to interpret macroscopic stress-strain experiments and extract important micro-level properties. The analysis reveals the existence of a periodic barrier for type I twin boundary motion with an average distance of 19 μm and amplitude of 0.16 J/m2. Further, we show that the macroscopic mechanical response depends on the length of the crystal and predict a significant decrease of the hysteresis in sub-mm length specimens.

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U2 - 10.1063/1.4773995

DO - 10.1063/1.4773995

M3 - مقالة

SN - 0003-6951

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 1

M1 - 011912

ER -

Application of a bi-stable chain model for the analysis of jerky twin boundary motion in NiMnGa

Abstract

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