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Abstract:

Static and dynamic aging in high carbon steel, mainly related to interaction of interstitial solute atoms and dislocations, are commonly being assessed by conventional mechanical testing and mechanical spectroscopy (internal friction). This paper describes and illustrates the use of other techniques such as differential scanning calorimetry and to a lesser extent Mossbauer spectroscopy. Thermoelectrical power measurements, scanning tunnel and atomic force microscopy have all proven to be useful semi-quantitative measurement tools. Tests have been carried out on small diameter (0.02-0.03 mm) and on larger diameter (1-2 mm) wires of plain carbon eutectoid steel as well as of microalloyed steel.