Magnetomechanical testing machine for ferromagnetic shape-memory alloys
Magnetomechanical testing machine for ferromagnetic shape-memory alloys
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DOI：
10.1063/1.1599072
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发表时间：
2003-08
影响因子：
1.6
通讯作者：
T. Shield
中科院分区：
文献类型：
--
作者：
T. Shield
最近，一类新的活性材料，被称为铁磁形状记忆合金，显示出作为执行器和传感器材料的前景。这些合金，如Ni2MnGa和Fe3Pd，是铁磁性的，并且经历可逆的无扩散结构相变，从而产生形状记忆行为。为了探索这些材料的性能，有必要将机械材料测试、磁场应用和磁化测量结合起来。为了实现这一目标，一种被称为磁机械试验机（MMTM）的设备已经被建造出来。MMTM结合了螺杆驱动的机械负载框架和双偶极子电磁铁，以机械和磁性方式加载样品。该磁体对允许磁场在包含机械测试架的单轴加载轴的平面内指向任何方向。另外，对试样温度进行了控制，并对试样表面进行了显微观察。本文对该装置进行了描述，并对其进行了初步探讨。
Recently, a new class of active materials, known as ferromagnetic shape-memory alloys, has shown promise as actuator and sensor materials. These alloys, such as Ni2MnGa and Fe3Pd, are ferromagnetic and undergo a reversible diffusionless structural phase transformation giving rise to shape-memory behavior. In order to explore the behavior of these materials it is necessary to combine both mechanical materials testing, magnetic field application, and magnetization measurements. To accomplish this, an apparatus called a magnetomechanical testing machine (MMTM) has been constructed. The MMTM combines a screw driven mechanical load frame with a dual-dipole electromagnet to load specimens both mechanically and magnetically. The pair of magnets allows the magnetic field to point in any direction in the plane containing the uniaxial loading axis of the mechanical test frame. In addition, the specimen temperature is controlled and the surface is observed microscopically. This apparatus is described and some prelim...