scholarly journals Small-diameter parallel plate rheometry: a simple technique for measuring rheological properties of glass-forming liquids in shear

2017 ◽  
Vol 56 (7-8) ◽  
pp. 661-671 ◽  
Author(s):  
Olli-Ville Laukkanen
Keyword(s):  
Rheological Properties ◽  
Parallel Plate ◽  
Simple Technique ◽  
Small Diameter ◽  
Glass Forming

Methods of Calculating and Representing Rheological Properties, Using Data from the Parallel-Plate Plastometer

1946 ◽  
Vol 19 (2) ◽  
pp. 461-465
Author(s):  
J. R. Scott
Keyword(s):  
Rheological Properties ◽  
Parallel Plate ◽  
Tentative Method ◽  
Using Data

Abstract A tentative method is described for obtaining, from readings of the parallel-plate Williams plastometer, the fundamental flow relation of the material under test, and for representing this relation graphically in a manner that facilitates comparisons between different materials.

Rheological Properties and Microstructure of Hypereutectic Semi-Solid Al-Si-Mg Alloys Using Rheocasting Route

2012 ◽  
Vol 192-193 ◽  
pp. 323-328 ◽  
Author(s):  
Mehand Tebib ◽  
Frank Ajersch ◽  
X. Grant Chen
Keyword(s):  
Solid State ◽  
Rheological Properties ◽  
Parallel Plate ◽  
Fluid Model ◽  
Flow Behavior ◽  
Microstructural Study ◽  
Shear Rates ◽  
Solid Phases ◽  
Semi Solid ◽  
Liquid And Solid Phases

The SEED rheocasting process was used to produce semi-solid slurries of hypereutectic Al-17Si-4.5Cu (A390) and Al-15Si-10.5Mg-4Cu alloys respectively. The rheological properties of these alloys in the semi-solid state were characterized at different deformation rates and at variable solid fractions using the parallel plate compression viscometry. The viscosity at different shear rates was calculated using a Newtonian fluid model for increments of deformation during compression. Microstructures of both alloys, after partial solidification and compression, were examined in order to characterize the flow behavior during deformation. The comparison of the viscosity between the A390 and Al-15Si-10.5Mg-4Cu alloys indicated that the high Mg containing alloy possessed a higher viscosity for the range of shear rates and solid fractions investigated. Rheological results showed that at a given solid fraction, the viscosity of both alloys decreased significantly with increasing shear rates, indicating a shear thinning behavior. In addition, a separation of liquid and solid phases was also observed for both alloys in the microstructural study of compressed semi-solid billets.

A simple technique for small-diameter urethrocutaneous fistula repair: Ligation

2017 ◽  
Vol 13 (1) ◽  
pp. 88-90 ◽  
Author(s):  
S.C. Karakus ◽  
I.R. User ◽  
V. Akcaer ◽  
B.H. Ozokutan ◽  
H. Ceylan
Keyword(s):  
Simple Technique ◽  
Small Diameter ◽  
Fistula Repair ◽  
Urethrocutaneous Fistula

scholarly journals Technique for the collection of clear urine from the Nile crocodile (Crocodylus niloticus)

2012 ◽  
Vol 83 (1) ◽  
Author(s):  
Jan G. Myburgh ◽  
Fritz W. Huchzermeyer ◽  
John T. Soley ◽  
Dirk G. Booyse ◽  
Herman B. Groenewald ◽  
...  
Keyword(s):  
Simple Technique ◽  
Urinary Catheter ◽  
Animal Health ◽  
Small Diameter ◽  
Urine Samples ◽  
Alligator Mississippiensis ◽  
Urinary Catheters ◽  
Faecal Material ◽  
Anatomical Features ◽  
Nile Crocodile

Urine samples can be a very useful diagnostic tool for the evaluation of animal health. In this article, a simple technique to collect urine from the Nile crocodile (Crocodylus niloticus) was described, based on a similar unpublished technique developed for the American alligator (Alligator mississippiensis) using a canine urinary catheter. With this technique, it was possible to collect relatively clean urine samples from Nile crocodiles of different sizes using canine urinary catheters or small diameter stomach tubes. Based on the gross anatomical features of the cloaca of the Nile crocodile, it was confirmed that urine accumulates in a chamber consisting of the urodeum and coprodeum. Faecal material is stored temporarily in the very short rectum, which is separated from the urinary chamber by the rectocoprodeal sphincter.

Structure, Annealing Characteristics and Mechanical Properties of Mg60Cu30-yY10Siy Bulk Amorphous Alloys

2002 ◽  
Vol 754 ◽  
Author(s):  
U. Wolff ◽  
B. Yang ◽  
N. Pryds ◽  
J.A. Wert
Keyword(s):  
Mechanical Properties ◽  
Amorphous Alloys ◽  
Simple Technique ◽  
Partial Substitution ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Glass Forming ◽  
Si Content ◽  
Constant Heating

ABSTRACTThe effect of different Si contents on the glass forming ability (GFA) and the amorphous-to-crystalline transformation has been investigated for the Mg-Cu-Y-Si system. Four Mg60Cu30-yY10Siy (y = 1–5 at.%) alloys were prepared using a relatively simple technique of rapid cooling of the melt in a copper mould. Crystallization was induced by heat treatment of the alloys and the samples were then characterized concerning their microstructure and thermal stability by X-ray diffraction (XRD), optical (OM) and scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) at a constant heating rate. Partial substitution of Cu by Si leads to a transition of the as-cast structure at a constant cooling rate from amorphous to crystalline with increasing Si content. Furthermore, the glass transition temperature (Tg) of the Mg-Cu-Y-Si alloy is lower compared to the Mg-Cu-Y system. The mechanical properties of the bulk Mg-Cu-Y-Si alloys have been investigated and found to vary with the Si content.

scholarly journals Microstructure and Rheological Properties of Semi-Solid 7075 Slurries Using SEED Rheocasting Process

2016 ◽  
Vol 256 ◽  
pp. 288-293 ◽  
Author(s):  
Amir Bolouri ◽  
Qin Fu Zhao ◽  
Pascal Côté ◽  
X. Grant Chen
Keyword(s):  
Rheological Properties ◽  
Grain Refinement ◽  
Parallel Plate ◽  
Grain Morphology ◽  
Transient State ◽  
High Strength ◽  
Processing Parameters ◽  
Seed Processing ◽  
Semi Solid ◽  
The Impact

The SEED rheocasting process was used to produce semisolid slurries of high strength 7075 aluminum wrought alloys. The effects of the SEED processing parameters on the microstructure of semisolid slurries were studied. The impact of grain refinement on the grain morphology and size was investigated. The rheological properties of semisolid 7075 alloys were characterized at different solid fractions using a parallel plate compression viscometer. Results indicated that the grain refinement could greatly improve the globularity of α-Al grains and rheoformability. The relationships between viscosity and shear rate at different solid fractions in the transient state for both unrefined and refined semisolid slurries were evaluated and discussed.

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