Remarkable difference between effects of carbon contents on recovery strain and recovery stress in Fe–Mn–Si–Cr–Ni–C alloys

2007 ◽  
Vol 457 (1-2) ◽  
pp. 334-337 ◽  
Author(s):  
Y.H. Wen ◽  
W.L. Xie ◽  
N. Li ◽  
D. Li
Keyword(s):  
Remarkable Difference ◽  
Recovery Stress ◽  
Recovery Strain

Recovery Strain and Stress Analysis of Fe-Mn-Si Shape Memory Alloy Metal-Lock Staple

2012 ◽  
Vol 580 ◽  
pp. 315-319
Author(s):  
De Ping Sun ◽  
Cheng Xin Lin ◽  
Lin Lin Liu ◽  
Zhi Jie Liu ◽  
Chao Yu Zhou
Keyword(s):  
Cast Iron ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Stress Analysis ◽  
Tensile Testing ◽  
Stress Measurement ◽  
Recovery Stress ◽  
Recovery Strain ◽  
Alloy Metal ◽  
Recovery Temperature

A metal-lock staple of Fe-Mn-Si shape memory alloy is firstly used in the repair of large cast iron structure. The paper studied the influence of pre-strain, recovery temperature, thermo-mechanical training on the recovery strain and recovery stress of the metal-lock staple of Fe-17Mn-5Si-2Cr-2Ni-1V shape memory alloy by the tensile testing and recovery stress measurement, and put forward the use principles of the metal-lock staple of the shape memory alloy.

Shape Memory Behavior of Ultra-High Molecular Weight Polyethylene

2012 ◽  
Vol 1403 ◽  
Author(s):  
Sergey Kaloshkin ◽  
Aleksey Maksimkin ◽  
Maria Kaloshkina ◽  
Mihail Zadorozhnyy ◽  
Margarita Churyukanova
Keyword(s):  
Molecular Weight ◽  
Shape Memory ◽  
High Molecular Weight ◽  
Shape Memory Polymers ◽  
Mechanical Analysis ◽  
Stress Recovery ◽  
Recovery Stress ◽  
Activation Temperature ◽  
Recovery Strain ◽  
Ultra High Molecular Weight

ABSTRACTShape memory effect in pure ultra-high molecular weight polyethylene (UHMWPE) has been studied using dynamic mechanical analysis. Temperature dependencies of properties that define functional characteristics of shape memory polymers (SMP) such as recovery stress, recovery strain and activation temperature of transition were determined for UHMWPE. The recovery stress in UHMWPE deformed by 200% achieved rather high values, up to 7 MPa.

Vibration Analysis of Composite Plate Embedded with SMA Fibers

2010 ◽  
Vol 139-141 ◽  
pp. 2331-2335
Author(s):  
Zheng Liang Wang ◽  
Xiao Yang Chen ◽  
En Yu Jiang ◽  
Di Shan Huang ◽  
Xiao Jin Zhu
Keyword(s):  
Finite Element ◽  
Steady State ◽  
Natural Frequency ◽  
Vibration Analysis ◽  
Composite Plate ◽  
Control Structure ◽  
Recovery Stress ◽  
Structure Deformation ◽  
Finite Element Software ◽  
Recovery Strain

Shape Memory Alloy(SMA)has advantages of great recovery stress and elastic modulus varied with the temperature, so it can be embedded in composite structure to active control structure deformation and vibration. In this paper, we have deducted the recovery stress at different temperature by modifying the phase-change coefficient Ω of Liang Constitutive Model[1], then base on = /E equation, the recovery stress is translated into recovery strain. By using finite element software ANSYS, the natural frequency of composite plate at influence of recovery stress can be obtained under both ends of fixed conditions at three configurations. The steady-state vibration response of the composite plate embedded SMA fibers is also simulated. The results show that recovery stress of SMA can increase the natural frequency and can suppress vibration effectively.

Deformability and Shape Memory Properties in Ti50Ni50 Rolled with Electric Current

2013 ◽  
Vol 738-739 ◽  
pp. 383-387
Author(s):  
Anna A. Potapova ◽  
Vladimir V. Stolyarov
Keyword(s):  
Cold Rolling ◽  
Shape Memory ◽  
Electric Current ◽  
Martensitic Transformations ◽  
Recovery Stress ◽  
Three Point Bending ◽  
Electroplastic Rolling ◽  
Recovery Strain ◽  
Shape Memory Properties ◽  
A Current

It is shown that deformability of Ti50.0Ni50,0 alloy at the rolling with current is considerably above than at the cold rolling. The influence of deformation with a current and without a current on feature of martensitic transformations was investigated. Recovery strain and recovery stress were studied on heating the sample subjected to preliminary strain by a three-point bending and optimal regimes of electroplastic rolling were defined.

PTSA (pressure and thermal swing adsorption) method to remove trihalomethanes from drinking water

1997 ◽  
Vol 35 (7) ◽  
pp. 243-250 ◽  
Author(s):  
Shigekazu Nakano ◽  
Tomoko Fukuhara ◽  
Masami Hiasa
Keyword(s):  
Drinking Water ◽  
Residual Chlorine ◽  
Remarkable Difference ◽  
Adsorption Method ◽  
Heating And Cooling ◽  
Point Of Use ◽  
Thermal Swing Adsorption ◽  
Long Time ◽  
Musty Odor ◽  
Vacuum Heating

It has been widely recognized that trihalomethanes (THMs) in drinking water pose a risk to human health. THMs can be removed to a certain extent by the conventional point-of-use (POU) unit which is composed of activated carbon (AC) and microfilter. But it's life on THMs is relatively shorter than on residual chlorine or musty odor. To extent the life of AC adsorber, pressure and thermal swing adsorption (PTSA) was applied by preferential regeneration of chloroform. PTSA was effective to remove THMs, especially chloroform. Adsorption isotherms of chloroform at 25 and 70°C showed a remarkable difference so that thermal swing was considered effective. Chloroform was also desorbed by reducing pressure. By vacuum heating at 70°C, chloroform was almost desorbed from AC and reversible adsorption was considered possible. A prototype of POU unit with PTSA was proposed. Regeneration mode would consist of dewatering, vacuum heating and cooling (backwashing). The unit was maintained in bacteriostatic condition and could be used for a long time without changing an AC cartridge.

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