Selecting rational geometric parameters of a disk mill in machining high-temperature nickel powder alloys

2008 ◽  
Vol 28 (8) ◽  
pp. 812-813
Author(s):  
A. V. Kovalevskii
Keyword(s):  
High Temperature ◽  
Nickel Powder ◽  
Geometric Parameters ◽  
Powder Alloys ◽  
Disk Mill

Online Measurement for the Thermal Geometric Parameters of Hot Large Forgings

2013 ◽  
Vol 421 ◽  
pp. 453-458
Author(s):  
Wei Liu ◽  
Zhen Yuan Jia ◽  
Ming Xing Li ◽  
Yang Liu ◽  
Yang Zhang
Keyword(s):  
High Temperature ◽  
Measurement Accuracy ◽  
High Efficiency ◽  
Geometric Parameters ◽  
Measurement Time ◽  
Feature Lines ◽  
High Measurement ◽  
High Temperature Components ◽  
Online Detecting ◽  
Geometry Characteristic

t is difficult to obtain high measurement accuracy in online detecting the thermal geometric parameters of hot large forgings, based on machine vision method. In this paper, firstly, a spectrum selective image acquisition method for high-temperature components is proposed, which can successfully reduced the effect of high temperature on image quality. Then, a measurement method based on the coding feature lines for geometric parameters of hot large forgings is employed, which can effectively improve the extraction efficiency of geometry characteristic information of high-temperature components. Experiments on the forging workshop show that measurement accuracy of diameters for cylindrical forging reaches 0.2% and the measurement time is 2.25 seconds; measurement accuracy of lengths for cuboid forging reaches 0.48% and the measurement time is 5.9 seconds. The experimental results have verified the feasibility and high efficiency of the proposed method for measuring the geometric parameters of hot large forgings.

scholarly journals Study on adaptability of rheological index of nano-PUA-modified asphalt based on geometric parameters of parallel plate

2021 ◽  
Vol 10 (1) ◽  
pp. 1801-1811
Author(s):  
Xiaolong Sun ◽  
Yikang Zhang ◽  
Qinyuan Peng ◽  
Junshen Yuan ◽  
Zhi Cang ◽  
...  
Keyword(s):  
High Temperature ◽  
Parallel Plate ◽  
High Speed ◽  
Geometric Parameters ◽  
Rheological Parameters ◽  
Test Results ◽  
Parallel Plates ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Rheological Test

Abstract To clarify the influence of geometric parameters of parallel plate on rheological properties of polyurea elastomer (PUA)-modified asphalt, nano-PUA powder was prepared, and nano-PUA powder modifier was modified by using high-speed shearing apparatus. The apparent viscosity of modified asphalt was evaluated by Brookfield viscosity. The rheological parameters of PUA-modified asphalt were determined by comparing the rheological test results of temperature scanning, frequency scanning, and multiple stress creep recover test using 8 and 25 mm parallel plates. Results indicated that the higher the content of nano-PUA modifier was, the better the high-temperature performance of asphalt would be. When using the 8 mm parallel plate, the high-temperature performance of modified asphalt was worse than that of matrix asphalt, and the PUA modifier would lead to a negative effect on the rheological property of asphalt. Regarding the 25 mm parallel plate, the high-temperature performance of modified asphalt was better than that of matrix asphalt, which was contrary to the results of 8 mm parallel plate. The rheological test results using 25 mm parallel plate were consistent with the results of Brookfield viscosity, indicating that 25 mm parallel plate was more suitable for evaluating the rheological performance of PUA-modified asphalt.

High-temperature radiation embrittlement of magnesium-beryllium powder alloys

1990 ◽  
Vol 29 (9) ◽  
pp. 725-727
Author(s):  
V. F. Zelenskii ◽  
I. M. Neklyudov ◽  
L. S. Ozhigov ◽  
V. I. Savchenko
Keyword(s):  
High Temperature ◽  
Radiation Embrittlement ◽  
Powder Alloys ◽  
Beryllium Powder ◽  
Temperature Radiation

Properties of Nickel Powder Alloys Hardened with Titanium Carbide

2016 ◽  
Vol 52 (2) ◽  
pp. 173-179 ◽  
Author(s):  
T. S. Cherepova ◽  
H. P. Dmytrieva ◽  
O. I. Dukhota ◽  
M. V. Kindrachuk
Keyword(s):  
Titanium Carbide ◽  
Nickel Powder ◽  
Powder Alloys

The Unit for Determining the Density and Surface Tension of Metallic Liquid Alloys, Using the Sessile Drop Method

2017 ◽  
Vol 889 ◽  
pp. 108-112
Author(s):  
Vladimir Tsepelev ◽  
Vladimir Vyukhin ◽  
Arkadi Povodator
Keyword(s):  
Surface Tension ◽  
High Temperature ◽  
Electric Furnace ◽  
Sessile Drop ◽  
Sessile Drop Method ◽  
Geometric Parameters ◽  
Liquid Alloys ◽  
Drop Surface ◽  
Horizontal Position ◽  
Metallic Liquid

There is a unit proposed for investigations in the high-temperature metallic liquid alloys, using image photometry of a “large melt drop” resting on the horizontal backplate. The unit is designed to determine the density d and surface tension σ of a sample of the mass given, placed into a horizontal electric furnace. Using a volumenometer enables measuring the geometric parameters of the drop. Various ways of expanding the range of operational functions are presented, in particular, extending the temperature range Δto and improving the unit efficiency as well as decreasing the artifacts’ impact. Updating the unit enables the studies (including the comparison studies) of both luminous and nonluminous samples to be conducted combining various ways of illuminating both the melt drop’s contours and surface. The ways of reducing the influence of vibrations and refining the backplate’s horizontal position as well as the possible measures for partial cleaning the films from the drop surface of the multicomponent melt are proposed. The use of the unit updated on the basis of approaches developed and patented by the authors enables reducing the time to be spent on measurements, expanding the range of the unit’s operational functions, decreasing the artifacts’ impact and improving the validity of the results obtained.

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

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