Stepwise conductance control of niobium nanocontacts by partial phase transformation

2021 ◽  
pp. 110247
Author(s):  
Yusuke Ochiai ◽  
Takuya Obi ◽  
Yuuki Tsuruoka ◽  
Tokushi Kizuka
Keyword(s):  
Phase Transformation ◽  
Partial Phase

Orientation Relationship during Partial α-γ-Phase Transformation in Microalloyed Steels

2005 ◽  
Vol 495-497 ◽  
pp. 447-452 ◽  
Author(s):  
I. Lischewski ◽  
Günter Gottstein
Keyword(s):  
Phase Transformation ◽  
Orientation Relationship ◽  
Microalloyed Steel ◽  
Austenite Phase ◽  
Microalloyed Steels ◽  
Special Focus ◽  
Partial Phase ◽  
Growth Selection

The ferrite to austenite phase transformation in microalloyed steel was studied, with a special focus on the orientation relationship between prior ferrite and subsequent austenite. Also the role of growth selection and preferred nucleation was investigated in this context. Their effects were examined at partial phase transformation.

Effects of Partial Phase Transformation on Characteristics of 9Cr Nanostructured Ferritic Alloy

2014 ◽  
Vol 10 (1) ◽  
pp. 47-50 ◽  
Author(s):  
Ji-Hyun Yoon ◽  
Yongbok Lee ◽  
Suk-Hoon Kang ◽  
Thak S. Byun ◽  
David T. Hoelzer
Keyword(s):  
Phase Transformation ◽  
Ferritic Alloy ◽  
Partial Phase

Structure-Induced Partial Phase Transformation Endow Hollow TiO2/TiN Heterostructure Fibers Stacked by Nanosheets Arrays with Extraordinary Sodium Storage Performance

2021 ◽  
Author(s):  
Pan Xue ◽  
Qiulong Li ◽  
Wenbin Gong ◽  
Zhongti Sun ◽  
Han Wang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Anode Materials ◽  
Ionic Diffusion ◽  
Effective Strategy ◽  
Diffusion Kinetics ◽  
Partial Phase ◽  
Storage Performance ◽  
Kinetics Of ◽  
Sodium Storage

Heterointerface constructed by structure-induced partial phase transformation is an effective strategy to synchronously boost the conductivity and regulate the ionic diffusion kinetics of TiO2 being considered as anode materials for...

Aluminium vanadate with unsaturated coordinated V centers and oxygen vacancies: surface migration and partial phase transformation mechanism in high performance zinc-ion batteries

2022 ◽  
Author(s):  
Yang Liu ◽  
Xiao Xiao ◽  
Xing Liu ◽  
Lei Lei Cui ◽  
Yun Gong
Keyword(s):  
Phase Transformation ◽  
High Performance ◽  
Oxygen Vacancies ◽  
Zinc Ion ◽  
Partial Transformation ◽  
Transformation Mechanism ◽  
Partial Phase ◽  
Surface Migration

Aluminium vanadate with unsaturated coordinated V centers and oxygen vacancies shows excellent Zn2+ storage due to the low Zn2+ migration barrier along the (001) surface, the co-(de)intercalation mechanism of H+/Zn2+ and the partial transformation.

scholarly journals Finite Strain Constitutive Modelling of Shape Memory Alloys Considering Partial Phase Transformation with Transformation-Induced Plasticity

2021 ◽  
Author(s):  
Giulia Scalet ◽  
Anargyros Karakalas ◽  
Lei Xu ◽  
Dimitris Lagoudas
Keyword(s):  
Phase Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Mechanical Loading ◽  
Finite Strain ◽  
Material Behavior ◽  
Partial Transformation ◽  
Element Analysis ◽  
Partial Phase ◽  
Transformation Induced Plasticity

AbstractThis paper presents a unified modelling effort to describe partial phase transformation during cyclic thermo-mechanical loading in Shape Memory Alloys (SMA). To this purpose, a three-dimensional (3D) finite strain constitutive model considering TRansformation-Induced Plasticity (TRIP) is combined with a modified hardening function to enable the accurate and efficient prediction of partial transformations during cyclic thermo-mechanical loading. The capabilities of the proposed model are demonstrated by predicting the behavior of the material under pseudoelastic and actuation operation using finite element analysis. Numerical results of the modified model are presented and compared with the original model without considering the partial transformation feature as well as with uniaxial actuation experimental data. Various aspects of cyclic material behavior under partial transformation are analyzed and discussed for different SMA systems.

Phase Transformation In Ti-6al-4v Alloys

1972 ◽  
Vol 30 ◽  
pp. 584-585
Author(s):  
Shiro Fujishiro
Keyword(s):  
Phase Transformation ◽  
Grain Boundary ◽  
Cryogenic Temperature ◽  
Β Phase ◽  
Heat Treated ◽  
Mixed Microstructure ◽  
Ductile Behavior

The Ti-6 wt.% Al-4 wt.% V commercial alloys have exhibited an improved formability at cryogenic temperature when the alloys were heat-treated prior to the tests. The author was interested in further investigating this unusual ductile behavior which may be associated with the strain-induced transformation or twinning of the a phase, enhanced at lower temperatures. The starting materials, supplied by RMI Co., Niles, Ohio were rolled mill products in the form of 40 mil sheets. The microstructure of the as-received materials contained mainly ellipsoidal α grains measuring between 1 and 5μ. The β phase formed an undefined grain boundary around the a grains. The specimens were homogenized at 1050°C for one hour, followed by aging at 500°C for two hours, and then quenched in water to produce the α/β mixed microstructure.

Microstructural and Microchemical Characterization of Nickel Sulfide Inclusions in Plate Glass

1991 ◽  
Vol 49 ◽  
pp. 962-963
Author(s):  
J. Cooper ◽  
O. Popoola ◽  
W. M. Kriven
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Glass Matrix ◽  
Nickel Sulfide ◽  
Plate Glass ◽  
Thermal Expansion Mismatch ◽  
Volume Increase ◽  
Β Phase ◽  
Microchemical Characterization

Nickel sulfide inclusions have been implicated in the spontaneous fracture of large windows of tempered plate glass. Two alternative explanations for the fracture-initiating behaviour of these inclusions have been proposed: (1) the volume increase which accompanies the α to β phase transformation in stoichiometric NiS, and (2) the thermal expansion mismatch between the nickel sulfide phases and the glass matrix. The microstructure and microchemistry of the small inclusions (80 to 250 μm spheres), needed to determine the cause of fracture, have not been well characterized hitherto. The aim of this communication is to report a detailed TEM and EDS study of the inclusions.

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