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| CORRELATION BETWEEN NUMERAL FRACTURE CHAR-ACTERISTICS AND FRACTURE TOUGHNESS OF MEDIUM-CARBON CrNiMo STEEL |
| by Zhang Zhenfang; Zhang Tianyi and Liu Minzhi(Institute of Metal Research; Academia Sinica) |
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Cite this article:
by Zhang Zhenfang; Zhang Tianyi and Liu Minzhi(Institute of Metal Research; Academia Sinica). CORRELATION BETWEEN NUMERAL FRACTURE CHAR-ACTERISTICS AND FRACTURE TOUGHNESS OF MEDIUM-CARBON CrNiMo STEEL. Acta Metall Sin, 1981, 17(3): 271-372.
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Abstract An investigation was conducted to observe the microstructure and macro-or micro-fracture surface, and to determine the fracture toughness and impact toughness of fatigue precracked specimens of four different types of structure of a medium-carbon CrNiMo steel. Some primary results were shown that its highest fracture toughness was evaluated by the specimens of sorbitie structure tempered at 600℃, but the lowest up to about 300℃. An identical variation is noted between the impact toughness of the fatigue precracked specimens and the fracture toughness from tri-point bending tests. Moreover, the numeral estimation for the various fractured surface characteristics with relation to fracture toughness has been attempted.
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Received: 18 March 1981
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