Abstract
Iron whiskers were examined by tensile test in the temperature range from 20°C to 230°C, and the stress-strain curves were obtained. In those curves serrations appeared, this being affected by the diameter of whiskers and test temperature. Microscopic observations of deformed whiskers showed that the serrations corresponded to the slip steps. The upper and lower yield stresses were also obtained with regard to the diameter and the temperature. The upper yield stress showed a linear relation to the logarithm of the reciprocal of the absolute temperature, and the lower yield stress presented a strong temperature dependence in the temperature range 20-75°C and a weak one in the range 120-230°C. From those results it was concluded that the serrations might be due to the formation of the simplified slip bands.
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