Next Article in Journal
Microstructure and Mechanical Properties of Ti5553 Butt Welds Performed by LBW under Conduction Regime
Next Article in Special Issue
Infrared Dissimilar Joining of Ti50Ni50 and 316L Stainless Steel with Copper Barrier Layer in between Two Silver-Based Fillers
Previous Article in Journal
Microstructure and Mechanical Properties of Ti6Al4V Alloy Modified and Reinforced by In Situ Ti5Si3/Ti Composite Ribbon Inoculants
Previous Article in Special Issue
Investigation of Dynamic Recrystallization of NiTi Shape Memory Alloy Subjected to Local Canning Compression
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Metals 2017, 7(7), 268; doi:10.3390/met7070268

Investigation on Deformation Mechanisms of NiTi Shape Memory Alloy Tube under Radial Loading

1
College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
2
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Received: 9 June 2017 / Revised: 2 July 2017 / Accepted: 11 July 2017 / Published: 13 July 2017
(This article belongs to the Special Issue Shape Memory Alloys 2017)
View Full-Text   |   Download PDF [7467 KB, uploaded 13 July 2017]   |  

Abstract

NiTi shape memory alloy (SMA) tube was coupled with mild steel cylinder in order to investigate deformation mechanisms of NiTi SMA tubes undergoing radial loading. NiTi SMA tubes of interest deal with two kinds of nominal compositions; namely, Ni-50 at % Ti and Ni-49.1 at % Ti, where at room temperature, B19′ martensite is dominant in the former, and B2 austensite is complete in the latter. The mechanics of the NiTi SMA tube during radial loading were analyzed based on elastic mechanics and plastic yield theory, where effective stress and effective strain are determined as two important variables that investigate deformation mechanisms of the NiTi SMA tube during radial loading. As for the NiTi SMA tube with austenite structure, stress-induced martensite (SIM) transformation as well as plastic deformation of SIM occur with the continuous increase of effective stress. As for NiTi SMA tube which possesses martensite structure, reorientation and detwinning of twinned martensite as well as plastic deformation of reoriented and detwinned martensite occur with the continuous increase in the effective stress. Plastic deformation for dislocation slip has a negative impact on superelasticity and shape memory effect of NiTi SMA tube. View Full-Text
Keywords: shape memory alloy; NiTi alloy; NiTi tube; radial loading; deformation mechanism shape memory alloy; NiTi alloy; NiTi tube; radial loading; deformation mechanism
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Jiang, S.; Yu, J.; Hu, L.; Zhang, Y. Investigation on Deformation Mechanisms of NiTi Shape Memory Alloy Tube under Radial Loading. Metals 2017, 7, 268.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top