Noncontact evaluation of the dependency of electrical conductivity on stress for various Al alloys as a function of plastic deformation and annealing
Noncontact evaluation of the dependency of electrical conductivity on stress for various Al alloys as a function of plastic deformation and annealing
复制标题
DOI：
10.1063/1.3456996
复制
发表时间：
2010-07
影响因子：
3.2
通讯作者：
M. Morozov;G. Tian;P. Withers
中科院分区：
文献类型：
--
作者：
M. Morozov;G. Tian;P. Withers
本文提出了一种非接触评价拉伸应力下金属试样电导率各向异性相关性的方法。该方法将涡流（EC）测量与数值模拟相结合，使用定向探头来推断纵向和横向的电导率，基本上是静态的单轴施加拉伸应力。该方法已应用于多种铝合金（AA1050、AA2024、AA5083和AA7075）。在屈服应力下，电导率的恢复变化在理论上预期的几个百分点的范围内。本文还评价了预塑性应变和热处理对电导率的影响。可淬硬合金的电导率张量与不可淬硬合金相比，对冷加工有明显的依赖性。结果讨论了他们的含义使用EC测量诊断状态的残余应力为铝合金。
This paper presents a method of noncontact evaluation of the anisotropic dependency of electrical conductivity of metallic specimens exposed to tensile stress. The method combines eddy current (EC) measurements using a directional probe with numerical modeling to infer the electrical conductivity longitudinal and transverse to an essentially static uniaxial applied tensile stress. The inversion method has been applied to various aluminum alloys (AA1050, AA2024, AA5083, and AA7075). The recovered changes in electrical conductivity lie within the theoretically expected range of a few percent at the yield stress. The effect of prior plastic strain and heat treatment on electrical conductivity has also been evaluated. The electrical conductivity tensor for hardenable alloys exhibit a distinct dependence on cold work compared to the nonhardenable ones. The outcomes are discussed in terms of their implications for the use of EC measurements for diagnosing the state of residual stress for aluminum alloys.