An Investigation of the Effects of Creep on Structure and Magnetic Properties of Nickel Through Simulated Cavitation in a Model Material

9310273本研究的主要目的是定量研究模型金属材料的微观结构参数与全球磁性变化之间的关系。这种金属是纯镍，选择它是为了避免微观结构变化的复杂情况，如硬质第二相，这可能会使分析变得复杂。利用阴极充电在镍的晶界形成氢化物，并诱发微空洞。用空洞数密度和空洞的平均尺寸来评估镍的蠕变损伤，并与体磁性能、矫顽力和磁导率进行比较。%这项调查可能会对高温蠕变损伤是潜在问题的领域产生技术影响，例如在发电厂运行的钢铁部件。***

9310273 Jiles The primary objective of this research is to make a quantitative examination of the relationships between microstructural parameters of a model metal material and global magnetic property changes. The metal is pure nickel, selected to avoid the complications of microstructural changes, such as hard second phases, that could complicate the analysis. Cathodic charging is employed to form hydrides at grain boundaries in the nickel and induce microcavities. Creep damage in nickel is assessed in terms of cavity number density and average size of cavities and compared to the bulk magnetic properties, coercivity and permeability. %%% This investigation could have technological impact in areas where high temperature creep damage is a potential problem, such as in steel components operating in power plants. ***