An Approach to Detecting the Brittle Transition Temperature of Steels by Means of Hardness Testing and Its Applications

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概要

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• This paper describes a new nondestructive approach to measuring the brittle transition temperature of several steels by means of hardness testing. The transition temperature in hardness tests is defined as the intersections of the two straight-lines in the plot of the logarithmic Vickers hardness vs. the reciprocal of absolute temperature. The transition temperature of hardness were discussed in comparison with the results of the usual tensile test and a specially instrumented Charpy impact test. It was concluded that the first and second transition temperatures of hardness were equivalent to the ductile transition temperature and brittle transition temperature respectively. The approach has been applied effectively as surveillance measures of (1) distributions of brittle transition temperatures of pre-strained welded steel plates, and (2) increases of the nil ductility transition temperature due to neutron irradiation for nuclear reactor vessel steels.

• 一般社団法人日本機械学会の論文

著者

• Sato Sennosuke

  Faculty Of Engineering The University Of Ibaraki Hitachi.

• Imamura Yoshio

  Faculty Of Engineering Ibaraki University

• Imamura Yoshio

  Faculty Of Engineering The University Of Ibaraki.

• OKU Tatsuo

  Japan Atomic Energy Research Institute.

関連論文

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• An Approach to Detecting the Brittle Transition Temperature of Steels by Means of Hardness Testing and Its Applications
• Effect of Neutron Irradiation on the Microstructures and Tensile Properties of Different Carbon Fibers
• Degradations of thermal shock resistance and fracture toughness of neutron irradiated reactor graphite.

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