《Acta Materialia》磁诱导应变Ni-Mn-Ga的组织和晶体结构演变！ …
网页自从发现磁场诱导应变(MFIS)以来，Ni-Mn-Ga Heusler合金引起了相当大的关注。这类材料具有多种响应功能，在外部磁场的影响下能够改变形状和尺寸。到目前为止，10M、14M和NM马氏体结构单晶合金的MFIS分别为7.1%、11…
NiMnGaTi铁磁形状记忆合金的马氏体相变和磁性能 - NEU
网页NiMnGa合金作为铁磁形状记忆合金的典型代表, 其磁致应变量远超磁致伸缩材料、压电材料或电致伸缩材料, 这一突出优点使其受到广泛关注 [1-3].研究发现, NiMnGa合金固有的高脆性、马氏体相变温度低, 以及为了获得更大的形状记忆效应通常需要对合金施加相对较大 ...
Magnetic field-induced rubber-like behavior in Ni-Mn-Ga …
网页2019年3月5日 · Single crystalline Ni-Mn-Ga is well known as a prototype ferromagnetic shape memory alloy (FSMA) exhibiting a giant magnetic field-induced strain (MFIS), up to 12%, due to the magnetically driven...
Characterization of NiMnGa magnetic shape memory alloys
网页2004年11月30日 · In this paper, we discuss the results of the characterization tests of various NiMnGa alloy crystals, with and without post-crystal growth heat treatment, by DSC, dilatometry, and optical metallography and scanning electron microscopy.
Ni2MnGa(100) ferromagnetic shape memory alloy: A surface study
网页2012年2月1日 · In this paper, we report surface study of Ni 2 MnGa (100) single crystal surface using low energy electron diffraction (LEED) and ultraviolet photoemission spectroscopy (UPS). The properties of the surface are influenced by both intrinsic effect related to the free surface as well as surface composition.
Ni–Mn–Ga Single Crystal Exhibiting Multiple Magnetic Shape …
网页2016年9月22日 · In the Ni–Mn–Ga martensite, it results in giant deformations of up to 12 % in moderate magnetic fields less than 1 T [7]. Importantly, no phase transformation is involved in this case in contrast to another effect which can be called magnetic field-induced phase transformation [8].
Materials Science and Engineering: A - ScienceDirect
网页2020年6月24日 · This article investigated microstructure, martensitic transformation and mechanical property of porous NiMnGa alloys fabricated by one-step sintering method using Mg powder as a pore former. The overall pore size was decreased with decreasing Mg content due to the reduction of aggregation tendency of Mg particles.
Magnetic Domains and Twin Boundary Movement of NiMnGa …
网页2012年5月29日 · Time-resolved metallographic optical microscopy techniques are used together with magnetic domain imaging to clarify the interaction between magnetic domains and twin boundary (TB) motion in magnetic shape memory NiMnGa single crystals. The magnetic field and stress induced magnetic domain formation is imaged by a magneto-optical indicator film ...
Ferromagnetic shape memory in the NiMnGa system
网页2002年8月6日 · Strain versus field measurements for a ferromagnetic shape memory alloy in the NiMnGa system demonstrate the largest magnetostrictive strains to date of nearly 1.3%. These strains are achieved in the martensitic state …
NiMnGa polycrystalline magnetically activated shape memory …
网页We report on the structural characteristics, magnetic properties and magnetically induced deformations obtained on as produced and annealed samples of bulk polycrystalline NiMnGa alloys. Extensive structural, magnetic and magnetomechanical characteristic are …
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