Anisotropy of detwinning process in textured NiTi shape memory alloy

Quanshui Zheng; Yong Liu

doi:10.1117/12.388239

14 June 2000 Anisotropy of detwinning process in textured NiTi shape memory alloy

Quanshui Zheng, Yong Liu

Proceedings Volume 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics; (2000) https://doi.org/10.1117/12.388239
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

Detwinning of thermally formed martensite twins in shape memory alloys leads to a macroscopic stress-plateau in the stress-strain curves. The response of twinned domains under stresses plays a critical role in the anisotropy of both the mechanical and the thermomechanical behavior of especially textured shape memory alloys. A recent result has shown that the relation between the shear direction of certainly distributed martensite twins and the loading direction is the key to understand both the microscopic and the macroscopic deformation processes. Based on this result, the present research has systematically analyzed the orientation-dependence of the detwinning process from a crystallographic approach and using mechanics of heterogeneous materials. The results are found to be well coherent with the experimental observations without superstitiously imposed conditions. For a NiTi sheet with given textures, the predicted response of two types of martensite twins, namely, type II and compound twins as a function of loading direction, agrees well with the experimental observations.

Citation Download Citation

Quanshui Zheng and Yong Liu "Anisotropy of detwinning process in textured NiTi shape memory alloy", Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, (14 June 2000); https://doi.org/10.1117/12.388239

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available