Nova Publishers
My Account Nova Publishers Shopping Cart
HomeBooksSeriesJournalsReference CollectionseBooksInformationSalesImprintsFor Authors
  Top » Catalog » Books » Materials Science » Shape Memory Alloys: Manufacture, Properties and Applications Chapters » My Account  |  Cart Contents  |  Checkout   
Quick Find
Use keywords to find the product you are looking for.
Advanced Search
What's New? more
Organic and Medicinal Chemistry
Shopping Cart more
0 items
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Notifications more
NotificationsNotify me of updates to Some Factors Affecting the Transformation Hysteresis in Shape Memory Alloys, pp. 361-369
Tell A Friend
Tell someone you know about this product.
Some Factors Affecting the Transformation Hysteresis in Shape Memory Alloys, pp. 361-369 $100.00
Authors:  Yong Liu
Transformation hysteresis is an important property of shape memory alloys (SMAs)
which requires careful consideration during the materials selection for targeted technical
applications. When being used for repeated active actuation purposes (for example in
MEMS, morphing wing of aerial vehicles, robotics, etc.) a small hysteresis is required
since it strongly influences the operational frequency achievable and the power
consumption needed for actuation. On the other hand, some applications may require very
large transformation hysteresis in order to maintain a stable austenite phase within a large
temperature range for retaining the predefined shape (for example in deployable space
structures, pipe joining, etc). In order to obtain SMAs with either very low or very high
hysteresis, a fundamental understanding on its influencing factors is ultimately important.
This short communication highlights several recent results on the factors affecting the
transformation hysteresis in shape memory alloys. This aricle is not aimed to provide a
complete spectrum on the transformation hysteresis of shape memory alloys. It is hoped to
encourage further investigation to understand the fundamental factors controlling the
transformation hysteresis, thus enabling an effective alloy design.
It is well known that the thermoelastic phase transformation is associated with a local
balance between chemical and non-chemical forces [1,2]. Chemical force arises from the
difference in Gibbs free energies between austenite and martensite and acts as a driving
force promoting the phase with lower energy at each temperature. Non-chemical force
arises from two major contributions; one is the elastic energy to accommodate the shape
and volume change during transformation and the other is the energy dissipated during
phase transformation. The elastic energy stored during forward transformation is released
upon reverse transformation acting as driving force, thus does not contribute to the
transformation hysteresis. It can be demonstrated that the elastic energy is responsible for
the transformation interval. The energy dissipation due to defect formation is irreversible
and contributes to the transformation hysteresis. Thus, factors contributing to the frictional
forces against structural phase transformation will contribute to the transformation
hysteresis. In the following, several observations/investigations on the factors affecting the
transformation hysteresis are briefly discussed namely, atomic radius of the alloying
elements, lattice mismatch between martensite and austenite, substrate-induced stress in
bimorph, and effect of precipitation. 

Available Options:
This Item Is Currently Unavailable.
Special Focus Titles
01.Peter Singerís Ethics: A Critical Appraisal
02.Sexism: Past, Present and Future Perspectives
03.Body and Politics: Elite Disability Sport in China
04.Childhood and Adolescence: Tribute to Emanuel Chigier, 1928-2017
05.Renal Replacement Therapy: Controversies and Future Trends
06.Food-Drug Interactions: Pharmacokinetics, Prevention and Potential Side Effects
07.Terrorism and Violence in Islamic History and Theological Responses to the Arguments of Terrorists
08.International Event Management: Bridging the Gap between Theory and Practice
09.The Sino-Indian Border War and the Foreign Policies of China and India (1950-1965)
10.Tsunamis: Detection, Risk Assessment and Crisis Management
11.Sediment Watch: Monitoring, Ecological Risk Assessment and Environmental Management
12.Self-Regulated Learners: Strategies, Performance, and Individual Differences

Nova Science Publishers
© Copyright 2004 - 2018

Some Factors Affecting the Transformation Hysteresis in Shape Memory Alloys, pp. 361-369