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Effect of crystal orientation on microstructure and properties of bulk Fe2B intermetallic

Published online by Cambridge University Press:  28 January 2015

Shengqiang Ma ,
Zhifu Huang ,
Jiandong Xing ,
Guangzhu Liu ,
Yaling He ,
Hanguang Fu ,
Yong Wang ,
Yefei Li  and
Dawei Yi
Shengqiang Ma*
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Zhifu Huang
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Jiandong Xing
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Guangzhu Liu
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Yaling He
Affiliation:
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Hanguang Fu
Affiliation:
Research Institute of Advanced Materials Processing Technology, School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, People's Republic of China
Yong Wang
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Yefei Li
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Dawei Yi
Affiliation:
School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi Province 710054, People's Republic of China
*
a)Address all correspondence to this author. e-mail: sqma@mail.xjtu.edu.cn
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Abstract

The effects of Fe2B-grain orientation on microstructure and properties of bulk Fe2B intermetallic fabricated by directional and ordinary solidification techniques have been investigated. The results show that unidirectional solidified Fe2B intermetallic possesses a strong (002) texture in the transverse direction owing to the opposite unidirectional heat-squeeze effect while random Fe2B grains can be produced under ordinary solidification conditions. The nonoriented Fe2B intermetallic has the highest linear expansion coefficient of 13.04 × 10−6 °C−1 while the microhardness and fracture toughness of transverse Fe2B intermetallic in the (002) plane are larger than those of Fe2B with other grain orientations and their values are ∼18.72 GPa and 6.42 MPa·m1/2, respectively. Liquid zinc corrosion results indicate that unidirectional Fe2B intermetallic with long axis perpendicular to the direction of liquid zinc corrosion displays the best corrosion resistance to liquid zinc owing to its beneficial barrier effect. The FeB transition phase can naturally form and grow parabolically during liquid zinc corrosion.

Keywords

borideorientationliquid zinccorrosionanisotropy
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 2 , 28 January 2015 , pp. 257 - 265
Copyright
Copyright © Materials Research Society 2015 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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