Effect of Additives on Physicomechanical Properties of High-Strength AS-Materials

The results of studies of the effects of high temperatures on high-refractory unshaped materials based on refractory oxides and silicides are given. The effect of mineral additives on their characteristics and physicomechanical characteristics is also shown. It has been established that unshaped aluminosilicate materials based on electrofusion or tabular material are able to work without loss of their properties at operating temperatures not lower than 1600 ºC. The introduction of carbon or basalt microfiber into the material makes it possible to reduce the volume and diameter of coronal refractories, but at the same time increases their linear average when exposed to high temperatures. Ill. 3. Ref. 2. Tab. 4.

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Complex Organomineral Additives with Hardening Accelerator

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.284.929 ◽

2018 ◽

Vol 284 ◽

pp. 929-935 ◽

Cited By ~ 1

Author(s):

O.V. Tarakanov ◽

E.A. Belyakova ◽

V.S. Yurova

Keyword(s):

Sodium Sulfate ◽

Raw Materials ◽

High Strength ◽

Strength Parameters ◽

Active Matrix ◽

Hardening Process ◽

Complex Additive ◽

Effect Of Additives ◽

Concrete Mix ◽

Mineral Components

A complex organomineral additive based on local raw materials (diatomite), superplasticizer and accelerator for sodium sulfate hardening has been developed. The possibility of using activated diatomite in the composition of concrete instead of microsilica with activation of the sodium sulfate hardening process is shown. The results of the effect of additives on the composition of the hydrated phases of cement systems, the processes of structure formation and hardening of cement materials, the effect of a complex additive on the strength of concrete are given. The achievement of high strength parameters of concretes, including those with a lower cement consumption, is ensured by introducing into the concrete mix fine-dispersed mineral components that promote the creation of a rheologically active matrix and increase the effectiveness of super-and hyperplasticizers.

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Optimizing of the Cementitious Composite Matrix by Addition of Steel Wool Fibers (Chopped) Based on Physical and Mechanical Analysis

Materials ◽

10.3390/ma14051094 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1094

Author(s):

Akrm A. Rmdan Amer ◽

Mohd Mustafa Al Bakri Abdullah ◽

Yun Ming Liew ◽

Ikmal Hakem A. Aziz ◽

Jerzy J. Wysłocki ◽

...

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

High Strength ◽

Mechanical Analysis ◽

Primary Reinforcement ◽

Physicomechanical Properties ◽

Cementitious Composite ◽

Steel Wool ◽

Composite Matrix ◽

Wool Fibers

The demand for durable, resistant, and high-strength structural material has led to the use of fibers as reinforcing elements. This paper presents an investigation into the inclusion of chopped steel wool fibers (CSWFs) in cement to form a high-flexural strength cementitious composite matrix (CCM). CSWFs were used as the primary reinforcement in CCM at increments of 0.5 wt%, from 0.5–6 wt%, with ratios of cement to sand of 1:1.5 and water to cement of 0.45. The inclusion of CSWFs resulted in an excellent optimization of the physicomechanical properties of the CCM, such as its density (2.302 g/cm3), compressive strength (61.452 MPa), and maximum flexural strength (10.64 MPa), all of which exceeded the performances of other reinforcement elements reported in the literature.

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Decomposition of the metastable beta titanium alloy Ti-15-3

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100075117 ◽

1983 ◽

Vol 41 ◽

pp. 264-265

Author(s):

Y. L. Chen ◽

S. Fujlshiro

Keyword(s):

Low Cost ◽

High Strength ◽

Alpha Phase ◽

Thick Sheet ◽

Omega Phase ◽

Beta Titanium Alloy ◽

Beta Titanium ◽

Beta Matrix ◽

Metastable Beta ◽

Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

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Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100074896 ◽

1983 ◽

Vol 41 ◽

pp. 220-221

Author(s):

L.J. Chen ◽

H.C. Cheng ◽

J.R. Gong ◽

J.G. Yang

Keyword(s):

Mechanical Properties ◽

Cooling Rate ◽

Automobile Industry ◽

High Strength ◽

Weight Percent ◽

Low Alloy Steels ◽

Dual Phase ◽

Resource Requirement ◽

Alloy Steels ◽

Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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The Nature of Delta Phase Precipitation in Inconel 718

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055916 ◽

1982 ◽

Vol 40 ◽

pp. 724-725

Author(s):

L. S. Lin ◽

C. C. Law

Keyword(s):

Inconel 718 ◽

Base Alloy ◽

High Strength ◽

Physical Metallurgy ◽

Nickel Base Alloy ◽

Phase Precipitation ◽

Weight Percentage ◽

Delta Phase ◽

The Subject ◽

Nickel Base

Inconel 718, a precipitation hardenable nickel-base alloy, is a versatile high strength, weldable wrought alloy that is used in the gas turbine industry for components operated at temperatures up to about 1300°F. The nominal chemical composition is 0.6A1-0.9Ti-19.OCr-18.0Fe-3Mo-5.2(Cb + Ta)- 0.1C with the balance Ni (in weight percentage). The physical metallurgy of IN 718 has been the subject of a number of investigations and it is now established that hardening is due, primarily, to the formation of metastable, disc-shaped γ" an ordered body-centered tetragonal structure (DO2 2 type superlattice).

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