タングステン・モリブデンの高温抗張力
1961 年 25 巻 9 号 p. 597-601
詳細
1961 年 25 巻 9 号 p. 597-601
The high-temperature tensile strength of various kinds of tungsten and molybdenum wires was measured at the temperature between 1,000∼3,000°K in vacuum. The apparatus consisted of a hard glass vacuum vessel, an iron weight floated in mercury and two supporting electrodes for heating specimens by electric resistance. At the results of measurements on 0.05 mm diameter wires, the high-temperature tensile strength of non-sag tungsten wires decreased when the holding time at the testing temperature was lengthened from one to ten minutes, up to 1800°K. Above this temperature, these tensile strengths had equal values.But fully recrystallized wires had lower values. Upon comparison of high-temperature strength of various kinds of tungsten, thoriated tungsten had the largest value, non-sag tungsten was next and pure tungsten had the smallest. These results were discussed and illustrated by their microscopic structures.
