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Textures and compressive properties of ferromagnetic shape-memory alloy Ni48Mn25Ga22Co5 prepared by isothermal forging process

Published online by Cambridge University Press:  01 March 2006

Y.D. Wang ,
D.Y. Cong ,
R. Lin Peng ,
P. Zetterström ,
Z.F. Zhang ,
X. Zhao  and
L. Zuo
Y.D. Wang*
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, People’s Republic of China
D.Y. Cong
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, People’s Republic of China
R. Lin Peng
Affiliation:
The Studsvik Neutron Research Laboratory (NFL), Uppsala University, S-61182 Nyköping, Sweden; and Department of Mechanical Engineering, Linköping University, S-58183 Linköping, Sweden
P. Zetterström
Affiliation:
The Studsvik Neutron Research Laboratory (NFL), Uppsala University, S-61182 Nyköping, Sweden
Z.F. Zhang
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
X. Zhao
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, People’s Republic of China
L. Zuo
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: ydwang@mail.neu.edu.cn
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Abstract

A ferromagnetic shape-memory alloy Ni48Mn25Ga22Co5 was prepared by the induction melting and isothermal forging process. Dynamic recrystallization occurs during the isothermal forging. The deformation texture was studied by the neutron diffraction technique. The main texture components consist of (110)[112] and (001)[100], which suggested that in-plane plastic flow anisotropy should be expected in the as-forged condition. The uniaxial compression fracture strain in the forged alloy reaches over 9.5%. The final room-temperature fracture of the polycrystalline Ni48Mn25Ga22Co5 is controlled mainly by intergranular mode.

Keywords

FerromagneticNeutron scatteringTexture
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 3 , March 2006 , pp. 691 - 697
Copyright
Copyright © Materials Research Society 2006

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