Local Atomic Arrangements in Alloys and Intermetallics

这项研究的目的是检查本地原子 在几种金属合金系统中， 过渡状态。 均匀降水的早期阶段 在铝-铜-镁、铁-铍和 镍铍合金 镍铝沉淀 合金的研究，以更好地了解形成有序 沉淀物。 铁基马氏体的结构 淬火后正在确定;结构变化， 还进行回火。 在水银中的原子有序- 碲化镉是用同步加速器反常 分散技术 先进的X射线衍射方法是 用于表征合金的主要实验工具 系统. 先进的扩散X射线散射技术， 原子位移和相关分析是 research.

The purpose of this research is to examine local atomic order in several metallic alloy systems that display a metastable transitional state. Early stages of homogeneous precipitation is examined in aluminum-copper-magnesium, iron-beryllium and nickel-beryllium alloys. Precipitation from nickel-aluminum alloys is studied to better understand formation of ordered precipitates. The structure of ferrous martensites immediately following the quench is being determined; structural changes from tempering is also pursued. Local atomic order in mercury- cadmium-telluride is being determined using synchrotron anomalous dispersion techniques. Advanced X-ray diffraction methods are the primary experimental tool used to characterize the alloy systems. Advanced diffuse X-ray scattering techniques from atomic displacements and the associated analysis are part of the research.