scholarly journals Martensitic transformation of grain-size mixed Ti51Ni49 melt-spun ribbons

2006 ◽  
Vol 424 (1-2) ◽  
pp. 171-175 ◽  
Author(s):  
K.N. Lin ◽  
S.K. Wu
Keyword(s):  
Grain Size ◽  
Martensitic Transformation ◽  
Melt Spun ◽  
Melt Spun Ribbons

The effect of rapid solidification and grain size on the transformation temperatures of Ni-44,8wt%Ti melt spun alloy

2012 ◽  
Vol 1373 ◽  
Author(s):  
G. C. S. Anselmo ◽  
W. B. de Castro ◽  
C. J. de Araújo
Keyword(s):  
Differential Scanning Calorimetry ◽  
Grain Size ◽  
Martensitic Transformation ◽  
Rapid Solidification ◽  
Melt Spinning ◽  
Scanning Calorimetry ◽  
Transformation Temperatures ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Melt Spinning Technique

ABSTRACTRibbons of the Ni-44.8wt%Ti shape memory alloy are prepared through the melt spinning technique. The study is focused on investigating the effect of the rapid solidification and grain size at characteristic start martensitic (Ms), final martensitic (Mf), start austenite (As) and final austenite (Af) transformation temperatures. Changes on martensitic transformation temperatures in Ti45Ni55 melt spun ribbons are observed as grain size is reduced. Results of optical microscopy and differential scanning calorimetry (DSC) are used to associate grain size with transformation temperatures.

Thermal and magnetic field-induced martensitic transformation in Ni50Mn25−xGa25Cux(0  ⩽  x  ⩽  7) melt-spun ribbons

2015 ◽  
Vol 49 (2) ◽  
pp. 025002 ◽  
Author(s):  
Zongbin Li ◽  
Naifu Zou ◽  
C F Sánchez-Valdés ◽  
J L Sánchez Llamazares ◽  
Bo Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Melt Spun ◽  
Melt Spun Ribbons

scholarly journals Martensitic Transformation in CuAlMn and CuAlNi Melt Spun Ribbons

1997 ◽  
Vol 07 (C5) ◽  
pp. C5-167-C5-172 ◽  
Author(s):  
J. Dutkiewicz ◽  
J. Morgiel ◽  
T. Czeppe ◽  
E. Cesari
Keyword(s):  
Martensitic Transformation ◽  
Melt Spun ◽  
Melt Spun Ribbons

Effect of deformation on the martensitic transformation of TiNi melt-spun ribbons

2013 ◽  
Vol 561 ◽  
pp. 180-183 ◽  
Author(s):  
Hongxing Zheng ◽  
Sichuang Xue ◽  
Wu Wang ◽  
Qijie Zhai ◽  
Zhiping Luo
Keyword(s):  
Martensitic Transformation ◽  
Melt Spun ◽  
Melt Spun Ribbons

Effect of high-rate annealing on microstructure, martensitic transformation and shape memory behavior of TiNiCu melt-spun ribbons

2019 ◽  
Vol 248 ◽  
pp. 48-51 ◽  
Author(s):  
Alexander Shelyakov ◽  
Nikolay Sitnikov ◽  
Irina Khabibullina ◽  
Natalia Tabachkova ◽  
Vyacheslav Fominski ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory ◽  
High Rate ◽  
Shape Memory Behavior ◽  
Melt Spun ◽  
Melt Spun Ribbons

Magnetization study of the kinetic arrest of martensitic transformation in as-quenched Ni52.2Mn34.3In13.5 melt spun ribbons

2012 ◽  
Vol 1485 ◽  
pp. 149-154 ◽  
Author(s):  
F.M. Lino-Zapata ◽  
J.L. Sánchez Llamazares ◽  
D. Ríos-Jara ◽  
A.G. Lara-Rodríguez ◽  
T. García-Fernández
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Temperature Cycling ◽  
Zero Field ◽  
Martensitic Transition ◽  
Magnetization Study ◽  
Melt Spun ◽  
Kinetic Arrest ◽  
Melt Spun Ribbons ◽  
Field Cooling

ABSTRACTThe kinetic arrest of martensitic transformation (MT) has been observed in as-solidified Ni52.2Mn34.3In13.5 melt spun ribbons. The main characteristics of this unusual field-induced magneto-structural phenomenon have been determined through a dc magnetization study. The sample studied was fabricated by rapid solidification using the melt spinning technique at a high quenching rate of 48 ms-1. At room temperature, it is a single phase austenite (AST) with the bcc B2-type crystal structure and Curie temperature of TCA=285 K. With decreasing temperature, the austenite phase transforms into the martensite phase (MST) with TCM≈185 K at a starting martensitic transition temperature of MS=275 K. A moderate but progressive kinetic arrest of the AST to MST transformation has been observed for magnetic field values above H=10 kOe and was studied up to Hmax= 90 kOe. The metastable character of the non-equilibrium field-cooled state is revealed by the decreasing behavior of the saturation magnetization under a large magnetic field of 50 kOe after temperature cycling from 10 K to 150 K. The total magnetization difference Δσ between the zero field-cooling and field-cooling pathways of the temperature dependence of magnetization shows irreversible and reversible components and the former decreases with decreasing temperature.

scholarly journals Microstructure and mechanical properties of rapidly solidified FeAlCr intermetallic compound

2009 ◽  
Vol 7 (02) ◽  
Author(s):  
R. A. Rodrí­guez-Dí­az ◽  
M. Suárez ◽  
J. Juárez-Islas ◽  
M. G. Garnica-Romo ◽  
J. Arenas-Alatorre ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Mechanical Properties ◽  
Grain Size ◽  
Intermetallic Compound ◽  
Tensile Tests ◽  
Chemical Analyses ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Rapidly Solidified

In this work results regarding microstructural characterization of a melt‐spun intermetallic compound Fe40Al5Cr (% at.) produced by rapid solidification employing the melt spinning technique at three different tangential wheel speeds (12, 16 and 20 ms‐1) are presented. Melt spun ribbons were characterized by optical and scanning electron microscopy (SEM) in order to observe morphology, grain size, ribbon thickness and also fracture surfaces after tensile tests. EDS coupled to SEM was employed to perform punctual and scan line chemical analyses on samples, x‐ray diffraction (XRD) was utilized to identify crystal structure and phases. Transmission electron microscopy (TEM) was employed to confirm crystal structure and also to characterize nanopores formed in the specimens by vacancy clustering. With regard to mechanical properties, micro hardness Vickers measurements as well as tensile tests at room temperature were applied to the rapidly solidified ribbons.The grain size of rapidly solidified Fe40Al5Cr ribbons suffered a drastic reduction as compared with alloys of the same composition produced by conventional melting and casting methods, and in melt‐spun ribbons it decreases as the wheel speed increases. Punctual and line‐scanning chemical analyses revealed that Cr enters in solid solution in FeAl matrix. Hardness measurements revealed a softening in rapidly solidified FeAlCr ribbons as compared with FeAl alloys and tensile test exhibited a (transgranular + intergranular) mode of fracture, reaching up to 3 % of elongation in FeAlCr alloys. The presence of porous (meso and nano) were also characterized.

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