Effect of Grain Orientation and Ordered Phase on Ductility of Fe-6.5%Si Alloy Wires

doi:10.11901/1005.3093.2017.170

Chinese Journal of Materials Research

2018, Vol. 32

Issue (4): 315-320 DOI: 10.11901/1005.3093.2017.170

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Effect of Grain Orientation and Ordered Phase on Ductility of Fe-6.5%Si Alloy Wires

Shibo WEN¹, Wei YANG², Xiangju SHI¹, Yongfeng LIANG¹, Feng YE¹(

)

1 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
2 Institute of Research of Iron and Steel, Shasteel, Jiangsu 215625, China

Cite this article:

Shibo WEN, Wei YANG, Xiangju SHI, Yongfeng LIANG, Feng YE. Effect of Grain Orientation and Ordered Phase on Ductility of Fe-6.5%Si Alloy Wires. Chinese Journal of Materials Research, 2018, 32(4): 315-320.

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Abstract

It reveals that the highest room-temperature ductility of the rolled sheets of Fe-6.5%Si (mass fraction) alloy is 0.8%, while the average tensile elongations of hot drawn wires are more than 1%. Furthermore, the maximum tensile elongation of the wires reaches 5.6%. By analyzing the microstructure, ordered structure, and deformation texture of the alloy, it follows that the ordered structure and deformation texture play important roles in improving the plasticity. This can be attributed to the structural change of B2 ordered structure and a strong <110> fiber texture of the wires.

Key words: metallic materials Fe-6.5%Si ductility microstructure ordered structure deformation texture

Received: 10 March 2017

Fund: Supported by National Natural Science Foundation of China (Nos. 51471031 & U1660115) and State Key Laboratory for Advanced Metals and Materials Independent Project (No. 2016Z-17)

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	Shibo WEN
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	Xiangju SHI
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https://www.cjmr.org/EN/10.11901/1005.3093.2017.170 OR https://www.cjmr.org/EN/Y2018/V32/I4/315

Fig.1 Tensile engineering stress-strain curves of Fe-6.5%Si alloy sheets and wires (a) 0.2 mm sheets before and after heat treatment; (b) 1.6 mm wires; (c) 1.15 mm wires after heat treatment

Fig.2 Microstructure of Fe-6.5%Si 0.2 mm sheets before and after heat treatment (a) 0.2 mm sheets before heat treatment; (b) 0.2 mm sheets after heat treatment

Fig.3 Microstructure of Fe-6.5%Si alloy wires (a) 1.6 mm wires; (b) 1.15 mm wires after heat treatment

Fig.4 [011] zone diffraction pattern and bright field image in Fe-6.5%Si alloy 0.2 mm sheets (a) [011] zone diffraction pattern; (b) bright field image showing dislocations

Fig.5 [011] zone diffraction pattern, dark and bright field image in Fe-6.5%Si alloy 0.2 mm sheets after heat treatment (a) [011] zone diffraction pattern; (b) dark field image showing B2 domains; (c) bright field image showing dislocations

Fig.6 [011] zone diffraction pattern, dark and bright field image in Fe-6.5%Si alloy ?1.6 mm wires (a) [011] zone diffraction pattern; (b) dark field image showing B2 domains; (c) bright field image showing dislocations

Fig.7 Orientational distribution of Fe-6.5%Si alloy ?1.6 mm wires (a) IPF orientational distribution; (b) inverse pole figures

Fig.8 Orientational distribution of Fe-6.5%Si alloy 1.15 mm wires after heat treatment (a) IPF orientational distribution; (b) inverse pole figures

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