Variation in kinetics of martensitic transformation during partial thermal cycling of the TiNi alloy

2014 ◽  
Vol 582 ◽  
pp. 46-52 ◽  
Author(s):  
Sergey Belyaev ◽  
Natalia Resnina ◽  
Alexey Sibirev ◽  
Ivan Lomakin
Keyword(s):  
Martensitic Transformation ◽  
Thermal Cycling ◽  
Tini Alloy ◽  
Kinetics Of

Unusual Multistage Martensitic Transformation in TiNi Shape Memory Alloy after Thermal Cycling

2013 ◽  
Vol 738-739 ◽  
pp. 372-376 ◽  
Author(s):  
Aleksey Sibirev ◽  
Sergey Belyaev ◽  
Natalia Resnina
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Thermal Cycling ◽  
Shape Memory ◽  
Temperature Interval ◽  
Defect Structure ◽  
Tini Alloy ◽  
Thermal Cycles ◽  
Unusual Phenomenon ◽  
Kinetics Of

Variation in kinetics of martensitic transformation, in an equiatomic TiNi shape memory alloy, during thermal cycles was investigated. Samples annealed at 500 °C for 1 hour were subjected to repeated thermal cycles, through the temperature range of martensitic transformation. Unusual 4-stage martensitic transformation during cooling after 30 thermal cycles was observed. Moreover, a new unusual phenomenon was found in the preliminary thermal cycled TiNi alloy. It was observed that variation in the highest temperature Th of thermal cycles temperature interval resulted in the redistribution of released heat among four calorimetric peaks, observed on cooling. It was found that if the Th temperature did not exceed 240 °C the variation in kinetics was repeatable, and determined only by the value of Th. It was assumed that the defect structure induced on preliminary thermal cycling changes reversibly on cooling and heating.

In situ observation of the martensitic transformation in (Mg,Y)-PSZ

1986 ◽  
Vol 44 ◽  
pp. 500-501
Author(s):  
R-R. Lee
Keyword(s):  
Martensitic Transformation ◽  
High Strength ◽  
Nucleation And Growth ◽  
In Situ Observation ◽  
Considerable Potential ◽  
Transmission Electron ◽  
Structural Applications ◽  
Applied Stresses ◽  
Kinetics Of

Partially-stabilized ZrO2 (PSZ) ceramics have considerable potential for advanced structural applications because of their high strength and toughness. These properties derive from small tetragonal ZrO2 (t-ZrO2) precipitates in a cubic (c) ZrO2 matrix, which transform martensitically to monoclinic (m) symmetry under applied stresses. The kinetics of the martensitic transformation is believed to be nucleation controlled and the nucleation is always stress induced. In situ observation of the martensitic transformation using transmission electron microscopy provides considerable information about the nucleation and growth aspects of the transformation.

The kinetics of lath martensitic transformation

2003 ◽  
Vol 112 ◽  
pp. 139-142 ◽  
Author(s):  
G. Ghosh ◽  
G. B. Olson
Keyword(s):  
Martensitic Transformation ◽  
Kinetics Of

Martensitic transformation in TiNi alloy at loading

2001 ◽  
Author(s):  
Sergey A. Egorov ◽  
Margarita E. Evard
Keyword(s):  
Martensitic Transformation ◽  
Tini Alloy
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