An Overview of Strength and Durability Aspects of Concrete Using PET Fibres

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100144218 ◽

1986 ◽

Vol 44 ◽

pp. 548-549

Author(s):

W. T. Donlon ◽

J. E. Allison ◽

S. Shinozaki

Keyword(s):

Electron Microscopy ◽

Automotive Industry ◽

Fuel Economy ◽

High Strength ◽

Al Alloys ◽

Light Weight ◽

Thin Sections ◽

Strength And Durability ◽

Rapidly Solidified ◽

Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

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Use of backscattered electron image intensity signals to calculate the water/cement ratio of concrete

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100122186 ◽

1992 ◽

Vol 50 (1) ◽

pp. 356-357

Author(s):

R. J. Lee ◽

A. J. Schwoeble ◽

Yuan Jie

Keyword(s):

Reliable Data ◽

X Ray ◽

Rapid Measurement ◽

Trained Personnel ◽

Electron Image ◽

Backscattered Electron ◽

Production Period ◽

Strength And Durability ◽

Automated Procedures ◽

Standard Density

Water/Cement (W/C) ratio is a very important parameter affecting the strength and durability of concrete. At the present time, there are no ASTM methods for determining W/C ratio of concrete structures after the production period. Existing techniques involving thin section standard density comparative associations using light optical microscopy and rely on visual comparisons using standards and require highly trained personnel to produce reliable data. This has led to the exploration of other methods utilizing automated procedures which can offer a precise and rapid measurement of W/C ratio. This paper discusses methods of determining W/C ratio using a scanning electron microscope (SEM) backscattered electron image (BEI) intensity signal and x-ray computer tomography.

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INCREASING THE WEAR RESISTANCE OF ELEMENTS AND COMPONENTS OF FORGING AND STAMPING EQUIPMENT (FOR EXAMPLE, PERFORMING SEPARATION OPERATIONS)

STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. In the frame of the XXIII Agribusiness Forum of the South of Russia and the Exhibition «Interagromash» Volume 1 ◽

10.23947/interagro.2020.1.686-687 ◽

2020 ◽

Author(s):

K.O. Kobzev ◽

◽

S.A. Vyalov ◽

E.S Bozhko ◽

I.A. Zolotuhina ◽

...

Keyword(s):

Wear Resistance ◽

Technological Capabilities ◽

Recoil Force ◽

The Press ◽

Strength And Durability

The article describes the possibilities of increasing the durability of crank presses. The influence of the main parameters of the press on the value of the recoil force was studied. Based on the analysis of this topic, the types of expansion of technological capabilities of crank presses and their strength and durability were summarized.

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