Journal article
Texture development and strain hysteresis in a NiTi shape-memory alloy during thermal cycling under load
Acta materialia, Vol.57(8), pp.2403-2417
2009
Handle:
https://hdl.handle.net/2376/101095
Abstract
Thermal cycling experiments were conducted on a NiTi shape-memory alloy at different constant applied stresses below the yield strength of the martensite. The mechanical strain response manifested as strain hysteresis loops, whose range was proportional to the applied stress. In situ neutron diffraction experiments show that the strain hysteresis occurs as a result of the establishment of a stress-dependent crystallographic texture of the martensite during the first cool-down from austenite, and thereafter repeated during thermal cycling under the same load. This texture is found to depend on the stress during the thermal cycling experiments. A strain-pole map is derived and shown to explain the observed texture during thermal cycling. The strain-pole methodology is shown to work with similar martensitic transformations in other material systems.
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Details
- Title
- Texture development and strain hysteresis in a NiTi shape-memory alloy during thermal cycling under load
- Creators
- B Ye - Materials Department, Northwestern University, Evanston, IL 60208, USAB.S Majumdar - Materials Department, New Mexico Tech., 801 Leroy Place, Socorro, NM 87801, USAI Dutta - Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA
- Publication Details
- Acta materialia, Vol.57(8), pp.2403-2417
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900546515901842
- Language
- English
- Resource Type
- Journal article