Physical Testing and Chemical Analysis 

About: Physical Testing and Chemical Analysis is an academic journal. The journal publishes majorly in the area(s): Detection limit & Ultimate tensile strength. Over the lifetime, 506 publications have been published receiving 708 citations.

Introduction to steel-determination of content of nonmetallic inclusions-micrographic method using standards diagrams gb/t 10561-2005

Abstract: It is introduced in this paper the survey of determination of non-metallic inclusions in steel with microscopy and also briefly explained in this paper the technique contents changes in Chinese national standard GB/T 10561-2005 after ISO 4967∶1998 adopted and made the new rersion be equated with the ISO standards.

Analysis of an Antioxidant

Abstract: FTIR,XRD and ICP-AES were applied to the analysis of an antioxidant for its components.As shown by the analytical results,the antioxidant was composed of phenothiazine,calcium carbonate and potassium nitrate,with their contents(in w%) of 85.25%,5.72% and 9.03% respectively.

EVOLUTION OF GLOBULAR AND DENDRITIC STRUCTURES IN SOLIDIFICATION OF Al-Si ALLOYS

Abstract: In this study, hypoeutectic Al-Si alloys were solidified under various conditions to investigate the evolution of the morphology of primary phase by changing and controlling pouring temperature, cooling rate, and semi-solid isothermal holding time.The results show that pouring temperature has the most important effect on the morphology of primary phase.When pouring temperature is low near to the liquids temperature with a low cooling rate of 0.3℃/s and isothermal holding for 1～5 min in semi-solid state. The morphology of primary phase is ideal globular microstructures.As the pouring temperature and the cooling rate increase, the morphology of the primary phase transfers from globular to dendritic.It was also found that inoculation favors the formation of globular structure.Based on the experiments, a Modified Cellular Automaton (MCA) model was applied to investigate the mechanism of evolution of the primary phase morphology during solidification of Al-Si alloys.

Testing Method of Density and Porosity of Dense Ceramic Materials

Abstract: The difference between the traditional boiling method and the caliper method used for testing of dense ceramic materials density and porosity was compared.The results show that the caliper method could make up shortcomings existing in the traditional boiling method to reduce the impact of personal and environmental fators on testing data and to improve the stability of testing results.Meanwhile,through extending Archimedes formula,it could be proved that the open porosity,closed porosity and true porosity of the dense ceramic materials were dependent on their own densities,including the bulk density,the apparent density and the true density.

Effect of load frequency on fatigue behavior of material in ultrasonic fatigue testing

Abstract: Fatigue behavior of 40Cr steel obtained by ultrasonic high-frequency fatigue testing method is usually larger than that by conventional low frequency testing. The effect of load frequency on fatigue behavior of the material can be ascribed to the effect of load strain rate. A modifying coefficient of load frequency is used to describe the effect of load frequency on fatigue behavior in ultrasonic fatigue testing. The modifying coefficient equals the ratio of fatigue strength coefficient of lower frequency load and high frequency load. And it can be determined approximately by the ratio of the tensile strength of the material at various high strain rates.