Analysis of Variant Orientation Before and After Compression in Polycrystalline Ni50Mn29Ga21 MSMA

Hürrich, C.; Wendrock, H.; Pötschke, M.; Gaitzsch, U.; Roth, S.; Rellinghaus, B.; Schultz, L.
October 2009
Journal of Materials Engineering & Performance;Oct2009, Vol. 18 Issue 5/6, p554
Academic Journal
This paper deals with the microstructure and plastic deformation of Ni50Mn29Ga21 ferromagnetic shape memory alloys. In contrast to conventional shape memory alloys, plastic deformation in the martensitic phase, which is due to twin boundary motion, may be caused not only by mechanical stress but also by an external magnetic field. The polycrystalline sample was prepared by directional solidification with a texture parallel to the heat flow. Afterwards, a heat treatment follows for chemical homogenization and stress relaxation in the austenitic state. The configuration of the twin boundaries was analyzed before and after compressing the samples. The microstructure after compression was related to the magnetic properties.


Related Articles

  • Texture memory and strain-texture mapping in a NiTi shape memory alloy. Ye, B.; Majumdar, B. S.; Dutta, I. // Applied Physics Letters;8/6/2007, Vol. 91 Issue 6, p061918 

    The authors report on the near-reversible strain hysteresis during thermal cycling of a polycrystalline NiTi shape memory alloy at a constant stress that is below the yield strength of the martensite. In situ neutron diffraction experiments are used to demonstrate that the strain hysteresis...

  • A Novel SMA-based Concept for Airfoil Structural Morphing. Barbarino, S.; Pecora, R.; Lecce, L.; Concilio, A.; Ameduri, S.; Calvi, E. // Journal of Materials Engineering & Performance;Oct2009, Vol. 18 Issue 5/6, p696 

    The adaptive structures concept is of great interest in the aerospace field because of the several benefits which can be accomplished in the fields including noise reduction, load alleviation, weight reduction, etc., at a level in which they can be considered as compulsory in the design of...

  • Phenomenological Modeling of Shape Memory Alloys. Buravalla, Vidyashankar; Khandelwal, Ashish // AIP Conference Proceedings;7/29/2008, Vol. 1029 Issue 1, p104 

    Shape memory alloys exhibit two characteristic effects, viz., shape memory and superelasticity or pseudoelasticity, due to a reversible solid-solid transformation brought about by either temperature or stress or both. The two important aspects involved in modeling the macroscopic SMA behavior...

  • FEA and Experimental Studies of Adaptive Composite Materials with SMA Wires. Kanas, K.; Lekakou, C.; Vrellos, N. // AIP Conference Proceedings;9/9/2008, Vol. 1045 Issue 1, p101 

    This study comprises finite element simulations and experimental investigations of the shape memory effect due to the presence of SMA (shape memory alloy) wires in composite materials. FEA was performed using ANSYS, where the pre-strain was modeled by equivalent changes in the expansion...

  • A Shape Memory Alloy Based Cryogenic Thermal Conduction Switch. Krishnan, V. B.; Singh, J. D.; Woodruff, T. R.; Notardonato, W. U.; Vaidyanathan, R. // AIP Conference Proceedings;2004, Vol. 711 Issue 1, p26 

    Shape memory alloys (SMAs) can produce large strains when deformed (e.g., up to 8%). Heating results in a phase transformation and associated recovery of all the accumulated strain. This strain recovery can occur against large forces, resulting in their use as actuators. Thus an SMA element can...

  • Mechanomagnetic spectroscopy of phase transitions in ferromagnetic shape memory alloys. Kustov, Sergey; Masdeu, Francesc; Cesari, Eduard // Applied Physics Letters;8/7/2006, Vol. 89 Issue 6, p061917 

    A technique for direct experimental investigations of coupling between applied elastic stress and magnetic response in ferromagnetic shape memory alloys over the temperature ranges of paramagnetic to ferromagnetic and martensitic transformations has been developed, based on the inverse...

  • Compressive response of NiTiHfPd and NiTiHfPd shape-memory alloys. Acar, E.; Tobe, H.; Kaya, I.; Karaca, H.; Chumlyakov, Y. // Journal of Materials Science;Feb2015, Vol. 50 Issue 4, p1924 

    The shape-memory properties of NiTiHfPd and NiTiHfPd polycrystalline alloys were determined through superelasticity and shape-memory tests in compression. It has been revealed that the NiTiHfPd has a maximum transformation strain of 3.8 % and work output of up to 30 J cm, while the NiTiHfPd has...

  • Stress-induced magnetization in polycrystalline Ni–Fe–Ga ferromagnetic shape memory alloy. Kustov, Sergey; Corró, Miquel; Cesari, Eduard // Applied Physics Letters;10/1/2007, Vol. 91 Issue 14, p141907 

    Results are reported for simultaneous experimental studies of the stress-induced magnetic induction and of anelasticity in a polycrystalline Ni–Fe–Ga ferromagnetic shape memory alloy. The authors found in the martensitic state a linear relationship between mechanically induced...

  • Hot Deformation Behavior of NiTiHf Shape Memory Alloy Under Hot Compression Test. Belbasi, Majid; Salehi, Mohammad; Mousavi, Seyed // Journal of Materials Engineering & Performance;Dec2012, Vol. 21 Issue 12, p2594 

    In this study, the hot deformation behavior of NiTiHf alloy was investigated. Compression tests were carried out at temperatures ranging from 800 to 1100 °C and at the strain rates of 0.001-1/s. The peak stress decreases with increasing deformation temperature and decreasing strain rate, a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics