An abnormal two-way shape memory effect in a rapidly solidified Ni51Ti49 alloy induced by low temperature constrained aging

2018 ◽  
Vol 149 ◽  
pp. 117-120 ◽  
Author(s):  
Y.Y. Li ◽  
X.Y. Yao ◽  
S. Cao ◽  
X. Ma ◽  
C.Y. Zeng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Rapidly Solidified

scholarly journals Fabrication and Shape Memory Characteristics of Highly Porous Ti-Nb-Mo Biomaterials

2017 ◽  
Vol 62 (2) ◽  
pp. 1367-1370 ◽  
Author(s):  
Y.-W. Kim ◽  
T.W. Mukarati
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Differential Scanning Calorimetric ◽  
Porous Scaffolds ◽  
High Porosity ◽  
Porous Ti ◽  
Human Body Temperature ◽  
Rapidly Solidified

AbstractNon-toxic Ti-Nb-Mo scaffolds were fabricated by sintering rapidly solidified alloy fibers for biomedical applications. Microstructure and martensitic transformation behaviors of the porous scaffolds were investigated by means of differential scanning calorimetric and X-ray diffraction. Theα″–βtransformation occurs in the as-solidified fiber and the sintered scaffolds. According to the compressive test of the sintered scaffolds with 75% porosity, they exhibit good superelasticity and strain recovery ascribed to the stress-induced martensitic transformation and the shape memory effect. Because of the high porosity of the scaffolds, an elastic modulus of 1.4 GPa, which matches well with that of cancellous bone, could be obtained. The austenite transformation finishing temperature of 77Ti-18Nb-5Mo alloy scaffolds is 5.1°C which is well below the human body temperature, and then all mechanical properties and shape memory effect of the porous 77Ti-18Nb-5Mo scaffolds are applicable for bon replacement implants.

scholarly journals Two-Way Shape Memory Effect and Micromachine of Rapidly Solidified Ferromagnetic Fe–Pd Ribbon

2006 ◽  
Vol 47 (3) ◽  
pp. 615-618 ◽  
Author(s):  
Harunobu Tomita ◽  
Teiko Okazaki ◽  
Yasubumi Furuya
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Rapidly Solidified

scholarly journals Magnetic Properties and Microstructures of Rapidly Solidified FePd Alloy Ribbons

2008 ◽  
Vol 59 ◽  
pp. 24-29 ◽  
Author(s):  
Yoichi Kishi ◽  
Zenjiro Yajima ◽  
Teiko Okazaki ◽  
Yasubumi Furuya ◽  
Manfred Wuttig
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Coercive Force ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Room Temperature ◽  
Parent Phase ◽  
Diffraction Profile ◽  
Rapidly Solidified

It is well known that FePd alloys are effective as a magneto-thermoelastic actuator material, because they have large magnetostriction and shape memory effect. In order to use the alloys for a micro-actuator, magnetic properties and microstructures have been examined as for rapidly solidified Fe-29.6 at% Pd alloy ribbons. The ribbons exhibit a large magnetostriction at room temperature and good shape memory effect. Magnetostriction and coercive force of the ribbons markedly depend on the direction of the applied magnetic field. Maximum values of magnetostriction and coercive force are obtained at θ = 85 degree (θ is the angle between the magnetic field and the ribbon plane). Relief effects corresponding to the formation of FCT martensite variants are observed on the grains. X-ray diffraction profile at room temperature shows that FCT martensitic phase and FCC parent phase coexist in the ribbon. Dense striations are observed in the TEM bright field images of FCT martensite plates. Selected area electron diffraction patterns revealed the striations to be thin twins.

Structure and Properties of Rapidly Solidified Nitinol Materials

1991 ◽  
Vol 246 ◽  
Author(s):  
K. H. Wu
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Heat Treatments ◽  
Structure And Properties ◽  
Transformation Temperatures ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Hot Rolled ◽  
Rapidly Solidified

AbstractTi50-(Pd(x)-Ni(50-x)) alloys were prepared with Pd ranging from 18 at% to 22%. Both hot-rolled strips and melt-spun ribbons were fabricated. Heat treatments from 400°C to 1000éC were evaluated. It was found that the meltspun ribbons demonstrated much higher transformation temperatures than those of as-cast materials. However, the hot-rolled strips failed to display a shape memory effect, as well as those ribbons with 18 at.% and 20% Pd.

Characterization of specific wood surface at shape memory effect

2016 ◽  
Vol 6 (3) ◽  
pp. 79-83
Author(s):  
Горбачева ◽  
Galina Gorbacheva ◽  
Санаев ◽  
Viktor Sanaev ◽  
Белковский ◽  
...  
Keyword(s):  
Low Temperature ◽  
Specific Surface ◽  
Shape Memory ◽  
Liquid Nitrogen ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Wood Surface ◽  
Liquid Nitrogen Temperature ◽  
Bet Method

The change of the specific wood surface at the shape memory effect is considered in this paper. The study was conducted using sorptive analyzer of specific surface and distribution of pores according to the size of Quadrasorb SI. Specific surface of samples SSA, сm2/g, was found by the low-temperature adsorption of krypton at liquid nitrogen temperature (77K) and was cal-culated by the Brunauer-Emmett-Teller (BET) method. The samples of beech, pine, oak sliced veneer and birch rotary-cut veneer were investigated.

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