liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Crystal structures and textures in the hot-forged Ni-Mn-Ga shape memory alloys
School of Materials and Metallurgy, Northeastern University, Shenyang, China.
Key Lab for Anisotropy & Texture of Mater., Northeastern Univ., Shenyang, China.
Linköping University, Department of Management and Engineering, Engineering Materials . Linköping University, The Institute of Technology.
The Studsvik Neutron Research Laboratory, Uppsala University.
Show others and affiliations
2006 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 37A, no 5, 1397-1403 p.Article in journal (Refereed) Published
Abstract [en]

Three ferromagnetic shape-memory alloys with the chemical compositions of Ni53Mn25Ga22, Ni48Mn30Ga22, and Ni48Mn25Ga22Co5 were prepared by the induction-melting and hot-forging process. The crystal structures were investigated by the neutron powder diffraction technique, showing that Ni53Mn25Ga22 and Ni48Mn25Ga22Co5 have a tetragonal, I4/mmm martensitic structure at room temperature, while Ni48Mn30Ga22 has a cubic, L2(1) austenitic structure at room temperature. The development of textures in the hot-forged samples shows the in-plane plastic flow anisotropy from the measured pole figures by means of the neutron diffraction technique. Significant texture changes were observed for the Ni48Mn25Ga22Co5 alloy after room temperature deformation, which is due to the deformation-induced rearrangements of martensitic variants. An excellent shape-memory effect (SME) with a recovery ratio of 74 pct was reported in this Ni48Mn25Ga22Co5 polycrystalline alloy after annealing above the martensitic transformation temperature, and the "shape-memory" influence also occurs in the distributions of grain orientations.

Place, publisher, year, edition, pages
2006. Vol. 37A, no 5, 1397-1403 p.
National Category
Engineering and Technology Other Materials Engineering
URN: urn:nbn:se:liu:diva-48093OAI: diva2:268989
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2010-12-02

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Peng, Ru
By organisation
Engineering Materials The Institute of Technology
In the same journal
Metallurgical and Materials Transactions. A
Engineering and TechnologyOther Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 26 hits
ReferencesLink to record
Permanent link

Direct link