Development of a novel home sperm test - temperature range

2006 ◽  
Vol 21 (11) ◽  
pp. 3028-3028
Author(s):  
Jaroslav J. Marik
Keyword(s):  
Test Temperature ◽  
Temperature Range ◽  
Test Temperature Range

scholarly journals Reply: Development of a novel home sperm test - temperature range

2006 ◽  
Vol 21 (11) ◽  
pp. 3028-3029
Author(s):  
Lars Björndahl ◽  
Tom Connelly ◽  
Jackson Kirkman-Brown ◽  
Christopher Barratt
Keyword(s):  
Test Temperature ◽  
Temperature Range ◽  
Test Temperature Range

Superplastic Forming Characteristics and Microstructural Development of an Aluminium Lithium Alloy (8090)

1990 ◽  
Vol 196 ◽  
Author(s):  
G. J. Mahon ◽  
R. Keyte ◽  
N. C. Parson ◽  
R. A. Ricks
Keyword(s):  
Test Temperature ◽  
Superplastic Forming ◽  
Microstructural Development ◽  
Temperature Range ◽  
Lithium Alloy ◽  
Steady Decrease ◽  
Rapid Fall ◽  
Stress Changes ◽  
Rate Testing ◽  
Forming Characteristics

ABSTRACTSuperplastic testing of the aluminium-lithium alloy 8090 has been performed in the temperature range 485°C to 550°C. Up to 530°C, raising the test temperature has the effect of increasing the m-value and decreasing the flow stress. Changes in superplastic forming characteristics and microstructure have been followed during straining using a variety of techniques. Jump-strain rate testing reveals that in the optimum temperature range (515°C to 525°C).there is a steady decrease in m-value. Cavitation also occurs, but can be suppressed effectively by applying a hydrostatic pressure during testing. Raising the test temperature above this optimum range to 550°C produces a significant decrease in the m-value and a more rapid fall-off with strain. These observations are explained in terms of recrystallisation and grain growth, and the effectiveness of precipitates in pinning grain boundaries at the various temperatures.

EFFECTS OF TEMPERATURE AND COMPOSITION ON DYNAMIC DEFORMATION BEHAVIOR OF ZR-BASED AMORPHOUS ALLOYS

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1153-1158
Author(s):  
DONG-GEUN LEE ◽  
YANG GON KIM ◽  
BYOUNGCHUL HWANG ◽  
YONGTAI LEE ◽  
SUNGHAK LEE
Keyword(s):  
Compressive Stress ◽  
Test Temperature ◽  
Deformation Behavior ◽  
Amorphous Alloys ◽  
Dynamic Deformation ◽  
Shear Bands ◽  
Total Strain ◽  
Maximum Compressive Stress ◽  
Temperature Range ◽  
Dynamic Deformation Behavior

Effects of test temperature and alloy composition on dynamic deformation behavior of Zr -based amorphous alloys were investigated in this study. Dynamic compressive tests were conducted in the temperature range from room temperature to 380°C using a compressive Kolsky bar. Dynamic compressive test results indicated that both maximum compressive stress and total strain of the amorphous alloys decreased with increasing test temperature because shear bands could propagate rapidly as the adiabatic heating effect was added at high temperatures. Maximum compressive stress and total strain of the alloy containing ductile β crystalline phases were higher than those of the monolithic amorphous alloys over the tested temperature range because β phases played a role in forming multiple shear bands. The alloys having lower T g or ductile phases had more excellent dynamic properties than the LM1 alloy.

Comparison of Recession Behavior between Lu2Si2O7 and Lu2SiO5 by High Speed Steam Jet at High Temperatures

2011 ◽  
Vol 484 ◽  
pp. 246-249 ◽  
Author(s):  
Shunkichi Ueno ◽  
Tatsuki Ohji ◽  
Hua Tay Lin
Keyword(s):  
Phase Change ◽  
Porous Structure ◽  
High Temperatures ◽  
Test Temperature ◽  
High Speed ◽  
Elevated Temperatures ◽  
The Other ◽  
Temperature Range ◽  
Bulk Surface ◽  
Porous Microstructure

The recession behavior of Lu2SiO5 and Lu2Si2O7 under high speed steam jet with a velocity of 50 m/s in temperature range between 1300o and 1500oC was compared. Material recession and porous microstructure were observed on the bulk surface for all samples after steam jet tests at the elevated temperatures. The porous structure for Lu2Si2O7 bulk samples become refine with increasing test temperature. On the other hand, the porosity of the porous structure for Lu2SiO5 bulk samples reduced with increasing test temperatures. Phase change was observed for the test of Lu2Si2O7 sample. Lu2SiO5 phase was formed on the Lu2Si2O7 bulk surface in the 1400oC test and Lu2Si2O7 phase was formed again on the surface of the bulk in the test at 1500oC. No phase change was observed in the tests for Lu2SiO5 between 1300o and 1500oC.

The impact toughness and mechanism of low-carbon steel fracture at low temperatures

2019 ◽  
Vol 85 (12) ◽  
pp. 51-57
Author(s):  
A. M. Ivanov ◽  
N. D. Kovalenko
Keyword(s):  
Brittle Fracture ◽  
Impact Toughness ◽  
Test Temperature ◽  
Fracture Mechanisms ◽  
Low Carbon ◽  
Entire Cross Section ◽  
Temperature Range ◽  
Fracture Area ◽  
Mixed Fracture ◽  
The Impact

The goal of the work is to study the effect of severe plastic deformation (SPD) on the impact toughness and fracture mechanism of St3sp low-carbon structural steel within a test temperature range of 293 – 213 K. The issues of deformation processing of steel St3sp billets using SPD method in conditions of the equal-channel angular pressing scheme (ECAP) are considered. The results of low-temperature tests by impact bending of Charpy steel samples in various states are presented. The impact toughness decreased by ~1.3 times as a result of ECAP in 16 passes. It is shown that the temperature dependence of the impact toughness of steel subjected to ECAP differs from that for steel in the delivery condition. A fractographic study of the fracture mechanisms of the steel in the initial state and after processing by ECAP at a test temperature of 293 – 213 K is carried out. It is shown that for the steel in the initial the transition from fracture with the formation of viscous and brittle fracture zones at 293 K to brittle at 213 K occurs through successive expansion of the brittle fracture area with decreasing temperature, whereas for hardened steel, the mixed fracture area appears in the local region at 233 K and expands to the entire cross section of the sample at 213 K. The microstructure formed as a result of ECAP in 16 passes in the temperature range up to 213 K prevents pure brittle fracture and leads to a mixed fracture pattern.

Defects in ion implanted silicon

1978 ◽  
Vol 36 (1) ◽  
pp. 386-387
Author(s):  
J.A. Lambert ◽  
P.S. Dobson
Keyword(s):  
Defect Structure ◽  
Dislocation Loops ◽  
Frank Loop ◽  
Burgers Vector ◽  
Temperature Range ◽  
Perfect Dislocation ◽  
Contrast Analysis ◽  
Image Position ◽  
Ion Implanted

The defect structure of ion-implanted silicon, which has been annealed in the temperature range 800°C-1100°C, consists of extrinsic Frank faulted loops and perfect dislocation loops, together with‘rod like’ defects elongated along <110> directions. Various structures have been suggested for the elongated defects and it was argued that an extrinsically faulted Frank loop could undergo partial shear to yield an intrinsically faulted defect having a Burgers vector of 1/6 <411>.This defect has been observed in boron implanted silicon (1015 B+ cm-2 40KeV) and a detailed contrast analysis has confirmed the proposed structure.

Domain coarsening by grain boundary migration in ordered Ni4Mo

1986 ◽  
Vol 44 ◽  
pp. 560-561
Author(s):  
K. Vasudevan ◽  
H. P. Kao ◽  
C. R. Brooks ◽  
E. E. Stansbury
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Short Range ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Rapid Cooling ◽  
Temperature Range ◽  
Fee Structure ◽  
Domain Coarsening ◽  
Boundary Reaction

The Ni4Mo alloy has a short-range ordered fee structure (α) above 868°C, but transforms below this temperature to an ordered bet structure (β) by rearrangement of atoms on the fee lattice. The disordered α, retained by rapid cooling, can be ordered by appropriate aging below 868°C. Initially, very fine β domains in six different but crystallographically related variants form and grow in size on further aging. However, in the temperature range 600-775°C, a coarsening reaction begins at the former α grain boundaries and the alloy also coarsens by this mechanism. The purpose of this paper is to report on TEM observations showing the characteristics of this grain boundary reaction.

The reaction of amorphous Ni-Nb films with Si in the presence of a native SiO2 layer

1990 ◽  
Vol 48 (4) ◽  
pp. 664-665
Author(s):  
N. Rozhanski ◽  
A. Barg
Keyword(s):  
High Temperature ◽  
Crystallization Temperature ◽  
Diffusion Barriers ◽  
Sio2 Layer ◽  
Si Substrate ◽  
Cross Sectional ◽  
Plan View ◽  
Temperature Range ◽  
Sputter Deposited

Amorphous Ni-Nb alloys are of potential interest as diffusion barriers for high temperature metallization for VLSI. In the present work amorphous Ni-Nb films were sputter deposited on Si(100) and their interaction with a substrate was studied in the temperature range (200-700)°C. The crystallization of films was observed on the plan-view specimens heated in-situ in Philips-400ST microscope. Cross-sectional objects were prepared to study the structure of interfaces.The crystallization temperature of Ni5 0 Ni5 0 and Ni8 0 Nb2 0 films was found to be equal to 675°C and 525°C correspondingly. The crystallization of Ni5 0 Ni5 0 films is followed by the formation of Ni6Nb7 and Ni3Nb nucleus. Ni8 0Nb2 0 films crystallise with the formation of Ni and Ni3Nb crystals. No interaction of both films with Si substrate was observed on plan-view specimens up to 700°C, that is due to the barrier action of the native SiO2 layer.

A Transmission Electron Microscopical Investigation of Phase Transformations in TiNi

1980 ◽  
Vol 38 ◽  
pp. 340-341
Author(s):  
P. Moine ◽  
G. M. Michal ◽  
R. Sinclair
Keyword(s):  
Electron Microscopy ◽  
Phase Transformations ◽  
Applied Stress ◽  
Structural Changes ◽  
Microscopical Investigation ◽  
Temperature Range ◽  
Transmission Electron ◽  
Electron Microscopical ◽  
Diffraction Effects ◽  
Microscopy Images

Premartensitic effects in near equiatomic TiNi have been pointed out by several authors(1-5). These include anomalous contrast in electron microscopy images (mottling, striations, etc. ),diffraction effects(diffuse streaks, extra reflections, etc.), a resistivity peak above Ms (temperature at which a perceptible amount of martensite is formed without applied stress). However the structural changes occuring in this temperature range are not well understood. The purpose of this study is to clarify these phenomena.

Fibre-optic temperature sensor with wide temperature range characteristics

1987 ◽  
Vol 134 (5) ◽  
pp. 291 ◽  
Author(s):  
K.T.V. Grattan ◽  
J.D. Manwell ◽  
S.M.L. Sim ◽  
C.A. Willson
Keyword(s):  
Wide Temperature Range ◽  
Temperature Sensor ◽  
Fibre Optic ◽  
Temperature Range
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