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МИНОБРНАУКИ РОССИИ
Федеральное государственное бюджетное учреждение науки
Институт проблем машиноведения Российской академии наук

МИНОБРНАУКИ РОССИИ
Федеральное государственное бюджетное учреждение науки
Институт проблем машиноведения Российской академии наук

Comparative study of grain fragmentation in iron during cold and warm deformation by uniaxial tension

Авторы:
N.Yu. Zolotorevsky , V.V. Rybin , E.A. Ushanova , A.N. Matvienko , V.N. Perevezentsev ,
Страницы:
239-251
ДОИ (doi):
Аннотация:

The microstructure fragmentation in iron tensile specimens deformed at room temperature and 600°C has been studied by means of EBSD. The aim of the research was to characterize and compare the patterns of fragmentation associated with the appearance and accumulation of deformation-induced high-angle boundaries (HABs). The microstructure was examined on the longitudinal section of necked specimens, in locations corresponding to various true strains from 0.5 to 1.6. It has been shown that a length of deformation-induced boundaries per unit area is characterized by rapid growth at small strains. With further straining, it ceases to grow in a low-angle interval of misorientations, whereas continues to grow in a high-angle interval. The accumulation of HABs occurs considerably faster during cold deformation, mainly through the formation of transition zones between grain-scale deformation bands.

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