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Measured Iron-Gallium Alloy Tensile Properties under Magnetic Fields

机译:磁场下测得的铁镓合金的拉伸性能

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Tension testing is used to identify Galfenol material properties under low level DC magnetic bias fields. Dog bone shaped specimens of single crystal Fe_(100-x)Ga_x, where 17 ≤ x ≤ 33 , underwent tensile testing along two crystalographic axis orientations, [110] and [100]. The material properties being investigated and calculated from measured quantities are: Young's modulus and Poisson's ratio. Data are presented that demonstrate the dependence of these material properties on applied magnetic field levels and provide a preliminary assessment of the trends in material properties for performance under varied operating conditions. The elastic properties of Fe-Ga alloys were observed to be increasingly anisotropic with rising Ga content for the stoichiometries examined. The largest elastic anisotropies were manifested in [110] Poisson's ratios of as low as -0.63 in one specimen. This negative Poisson's ratio creates a significant in-plane auxetic behavior that could be exploited in applications that capitalize on unique area effects produced under uniaxial loading.
机译:拉伸测试用于识别低水平直流磁偏置场下的Galfenol材料性能。狗骨状单晶Fe_(100-x)Ga_x的试样,其中17≤x≤33,沿两个结晶轴方向[110]和[100]进行了拉伸测试。根据测量量研究和计算的材料性能为:杨氏模量和泊松比。所提供的数据证明了这些材料特性对施加的磁场水平的依赖性,并提供了在各种操作条件下性能的材料特性趋势的初步评估。观察到的化学计量比随着Ga含量的增加,Fe-Ga合金的弹性越来越各向异性。最大的弹性各向异性表现在[110]的一个样品中泊松比低至-0.63。该负泊松比产生了显着的平面内拉力行为,可在利用单轴载荷下产生的独特面积效应的应用中加以利用。

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