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Impact of rolling temperature on microstructure, ordered phases, and ductility in Fe–6.5 wt% Si magnetic material

Published online by Cambridge University Press:  27 September 2016

Changsheng Li ,
Guojun Cai ,
Ban Cai  and
Qiwen Wang
Changsheng Li*
Affiliation:
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
Guojun Cai
Affiliation:
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
Ban Cai
Affiliation:
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
Qiwen Wang
Affiliation:
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Ordered phases and ductility of Fe–6.5 wt% Si magnetic material were investigated under different rolling temperatures, and the constitutive equation of the warm deformation was established. The results show that at high rolling temperature, accompanying with the appearance of some shallow dimples, the intergranular fracture can be transformed into the quasicleavage fracture, which makes the ductility of warm-rolled sheets greatly improved. In the 450–650 °C rolling temperature range, the antiphase domains (APDs) of warm-rolled sheets are cut, the superdislocation density increases greatly with decreasing warm rolling temperatures, resulting in a decrease in APD sizes during warm deformation. Meanwhile, more B2 and DO3 ordered phases occurring in the matrix improve the long range order parameters, thereby significantly reducing ductility of the alloy. The work softening of Fe–6.5 wt% Si alloy is attributed to a contribution combining the sizes of APDs with ordered phases.

Keywords

Fe–6.5 wt% SiB2DO3APDsuperdislocation density
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 19 , 14 October 2016 , pp. 3004 - 3015
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Copyright
Copyright © Materials Research Society 2016 

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