Experimental study on the thermoelastic martensitic transformation in shape memory alloy polycrystal induced by combined external forces

1995 ◽  
Vol 26 (11) ◽  
pp. 2923-2935 ◽  
Author(s):  
Petr Sittner ◽  
Yasuhiro Hara ◽  
Masataka Tokuda
Keyword(s):  
Experimental Study ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Thermoelastic Martensitic Transformation ◽  
External Forces

Experimental Study on Reversibility of Magnetically Controlled Shape Memory Alloy

2010 ◽  
Vol 44-47 ◽  
pp. 3100-3104 ◽  
Author(s):  
Ying Li Ding ◽  
Yong Zhi Cai ◽  
Cheng Wu Lin
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Dynamic Response ◽  
Shape Memory ◽  
High Sensitivity ◽  
Vibration Detection ◽  
Dynamic Reversibility ◽  
The Magnetic Field

This paper reports an experiment equipment which is used as reversibility research of magnetically controlled shape memory alloy (MSMA). The vibration detection is done based on dynamic reversibility of MSMA. The results show that MSMA will induce Martensitic transformation in the magnetic field. The characteristics of rapid dynamic response, high sensitivity and reversibility are found. The material is of a bright future of application in sensors and self-sensing actuator (SSA) field.

The Two-Way Memory Effect by Pre-Straining in a 45Ni50Ti5Cu Alloy

1996 ◽  
Vol 459 ◽  
Author(s):  
G. Airoldi ◽  
T. Ranucci
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Plastic Strain ◽  
Shape Memory ◽  
Memory Effect ◽  
Thermal Cycle ◽  
Thermoelastic Martensitic Transformation ◽  
First Results ◽  
B2 Phase ◽  
The One

ABSTRACTThe 45Ni50Ti5Cu shape memory alloy exhibits one single thermoelastic martensitic transformation from the parent B2 phase to monoclinic B19’and looks as an appealing system to be used for the two way memory effect (TWME). First results, appeared in literature, on the TWME in 45Ni50Ti5Cu indicate that in this alloy high figures for the two way strain can be obtained. The prestrain method is here investigated to imprint the TWME in a 45Ni50Ti5Cu alloy: a pseudoplastic deformation higher than the reorientation strain is applied in martensite, followed, after unloading, by a recovery of the one-way strain by heating to 110°C. The two way memory strain is detected in the following thermal cycle. Results show the two way memory strain can be imprinted in just one cycle, but it can even considerably be increased by repeating the procedure: the highest figure for the two way memory strain is however obtained whenever a plastic unrecoverable strain is accumulated in the specimen in some prestraining cycles. Often the maximum two way strain is of the same order as the plastic strain and the former decreases with the increase of the latter.

scholarly journals Experimental study of a new sutureless intraluminal graft with a shape-memory alloy ring

1994 ◽  
Vol 107 (1) ◽  
pp. 191-195 ◽  
Author(s):  
Chuanrui Yang ◽  
Yanqing Sun ◽  
Peiqing Dong ◽  
Huazhong Wang
Keyword(s):  
Experimental Study ◽  
Shape Memory Alloy ◽  
Shape Memory

scholarly journals Experimental Study and Modeling of the Fatigue Fracture of High-Strength FeMnSi-based Shape Memory Alloy

2020 ◽  
Vol 28 ◽  
pp. 2110-2117
Author(s):  
Fedor S. Belyaev ◽  
Margarita E. Evard ◽  
Eugeny S. Ostropiko ◽  
Aleksandr E. Volkov
Keyword(s):  
Experimental Study ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Fatigue Fracture ◽  
High Strength

Micro and Macromechanical Study of Stress-Induced Martensitic Transformation in a Cu-Al-Be Polycrystalline Shape Memory Alloy

2006 ◽  
Vol 509 ◽  
pp. 87-92 ◽  
Author(s):  
F.M. Sánchez ◽  
G. Pulos
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Vector Fields ◽  
Displacement Vector ◽  
Optical Microscope ◽  
Image Sequences ◽  
Tension Test ◽  
Loading Device ◽  
Stress States

An experimental investigation of the micro and macromechanical stress-induced martensitic transformation in a Cu-Al-Be polycrystalline shape memory alloy is undertaken using a uniaxial tension test. Digital images are acquired at different stress states. The image sequences are analyzed to estimate the optical flow to get displacement vector fields. The experiments are carried out on a miniature hydraulic loading device mounted under an optical microscope. The stress-strain curves and associated images show stress-induced martensitic transformation in specific grains. Displacement vector fields for the polycrystalline shape memory alloy are obtained. They are inhomogeneous due to the martensitic transformation and inter-granular interactions.

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