Identification of hardening parameters of metals from spherical indentation tests

Article Abstract:

Spherical indentation test is applied and the penetration depth during loading and unloading is measured to propose the identification method of hardening parameters that specify stress strain curve. The material hardening parameters m and k are provided with sufficient accuracy by the identification method, while the loading program is executed to generate plastic loading curve and to eliminate the effects of elastic strain.

Stress analysis (Engineering)

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Determination of friction coefficient by employing the ring compression test

Article Abstract:

The effect of material properties, strain-rate sensitivity, and barreling on the behavior of friction calibration curves was investigated by conducting a research and the magnitude of the friction coefficient, mu was determined by carrying on a series of ring compression tests. The results indicated that the material properties and test conditions affect the friction calibration curves.

Compressibility

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Effects of inclusions and microstructures on impact energy of high heat-input submerged-arc-weld metals

Article Abstract:

Submerged-arc-weld metal made with variations of heat-input and consumables were examined to study the inclusions and their effects on the Charpy impact energy of the weld metal as a measure of the toughness. However as the heat input increased, the average size of inclusions increased but their number density decreased.

United States, Microstructure, Microstructures, Inclusions

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