# Experimental determination of equilibrium stress in stress-induced martensitic transformation at low temperatures in Ni-rich TiNi

https://mdr.nims.go.jp/datasets/56e134e9-202d-442c-8976-2658f6603c7d

## Files

- [2025_APL_strainratejump_niitsu.pdf](https://mdr.nims.go.jp/filesets/6ed9f55d-c980-47f1-885f-c66c936cc458/download) ([Detail](https://mdr.nims.go.jp/filesets/6ed9f55d-c980-47f1-885f-c66c936cc458.md))

## Id

56e134e9-202d-442c-8976-2658f6603c7d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-01-16T03:13:20.971227Z

## Updated at

2026-01-16T05:21:51.531748Z

## Published at

2026-01-19T03:21:44.254452Z

## Doi



## First published url

https://doi.org/10.1063/5.0301524

## Date published

2025-12-15

## Recorded date published

2025-12-15

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Experimental determination of equilibrium stress in stress-induced martensitic
    transformation at low temperatures in Ni-rich TiNi
  title_type: original
  lang: en

## Description

- description: "The exceptional broadening of superelastic stress hysteresis at low
    temperatures in Ni-rich Ti–Ni shape-memory alloys impedes their cryogenic applications.
    This broadening arises from thermally activated habit plane glide. Traditionally,
    equilibrium stress has been assumed to lie at the midpoint between forward and
    reverse martensitic transformation (MT) stresses, assuming reciprocal kinetics.
    Here, we assess this assumption using strain-rate jump tests, a simple method
    that detects the magnitude of stress change in response to strain-rate variation.
    The observed stress change is consistently larger during the forward MT than the
    reverse MT, indicating an asymmetric thermal activation and a shift in equilibrium
    stress toward the reverse MT stress. This result deviates from the classical midpoint
    approximation in systems with significant\r\nhysteresis broadening. Strain-rate
    jump test is demonstrated to be a simple yet effective method for locating the
    equilibrium stress, even when it is bracketed deep within a broadened stress hysteresis."
  description_type: abstract
  lang: und

## Creator

- name: Kodai Niitsu
  role: author
  orcid: https://orcid.org/0000-0002-0430-8868
  organization: National Institute for Materials Science
- name: Ryosuke Kainuma
  role: author

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: Phase transitions
  schema: not_defined
- subject: Phase equilibrium
  schema: not_defined
- subject: Shape memory effect
  schema: not_defined
- subject: Superelasticity
  schema: not_defined
- subject: Kinetics
  schema: not_defined
- subject: Dynamics
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-12-19

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Applied Physics Letters
  issn: '00036951'
  volume: '127'
  issue: '24'
  article_number: '241903'

## Conference



## Related item



## Funding

- identifier: JPMJPR22Q6
  funder_name: Precursory Research for Embryonic Science and Technology
- identifier: 23K04366
  funder_name: Japan Society for the Promotion of Science
- identifier: 19H02418
  funder_name: Japan Society for the Promotion of Science

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: 6ed9f55d-c980-47f1-885f-c66c936cc458
  filename: 2025_APL_strainratejump_niitsu.pdf
  content_type: application/pdf
  size: 2109983
  md5: 80d6205ed6ea43cf3c9f6c43368deafa

## Thumbnail

fileset_id: 6ed9f55d-c980-47f1-885f-c66c936cc458
filename: 2025_APL_strainratejump_niitsu.pdf