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Effect of Liquid Forging Pressure on Solubility and Freezing Coefficients of Cast Aluminum 2124, 2218 and 6063 Alloys

100%

Tirth V. , Arabi A.

Archives of Metallurgy and Materials

2020

tom Vol. 65, iss. 1

357--366

Liquid forging alias squeeze casting gives the combined advantage of casting and forging. Optimum process parameters are important to get a cost-efficient process. In this study, four materials have been identified, which are extensively used in industries. These materials are commercially pure Al and three Al-alloys namely, 2124, 2218 and 6063. The pouring temperature and the mold temperature is maintained at 700°C and 250°C respectively. The materials were developed at seven pressure variations from 0 to 150 MPa. The effect of the pressure on the microstructures, porosity, and hardness has been reported. The coefficient of solubility is estimated for all materials and a polynomial relationship is found to be the best fit with the applied pressure. The pressure of 100 MPa gives better increment in hardness. The melting point and the freezing coefficient of the materials under study have been determined. A linear relationship between the pressure and the freezing time is deduced. It is observed that the solubility and the freezing coefficients depend on the pressure as well, in addition to the composition and temperature.

Analytical dependence of substance solubility measure on temperature

58%

Pluta Z. , Hryniewicz T.

International Letters of Chemistry, Physics and Astronomy

2012

tom Vol. 5

20-34

The work covers an adequate analytical dependence of solubility measure of the chemical substances on the water/aqueous solution temperature. The solubility was defined and new, more readable solubility measure was introduced; the coefficient of solubility has been proposed instead. Then the source differential equation was introduced as the basis for the derivation of a final analytical form of dependence of the solubility coefficient on temperature. That characteristics has been developed by determining the dependence of the solubility coefficient variability intensity on temperature. An example of the use of presented theory has been delivered by referring it to the phenomenon of dissolution of AgNO3 silver nitrate in the aqueous environment. In the summary, quite a developed use of the source differential equation has been underlined with some more examples revealed.

Badania skladu chemicznego wybranych sortymentow pieczywa ciemnego

44%

Rzedzicki Z. , Kasprzak M.

Bromatologia i Chemia Toksykologiczna

2009

tom 42

nr 3

277-281