US-Polish Cooperative Research: Texture Analysis with Discrete Methods

9411666温克加州大学伯克利分校的汉斯-鲁道夫·温克博士和波兰科学院克鲁博斯基金属研究所的简·波斯皮耶希博士共同开展的这一美国-波兰研究项目，是一项“离散方法的纹理分析”。潘·克拉科夫和加州大学伯克利分校之间的跨学科研究协调努力，以获得多晶材料取向特征的定量信息，特别是那些晶体和样品对称性较低的材料，这些材料不仅在地质学上很典型，在陶瓷和聚合物科学中也是典型的。它们表明，离散方法在从最少的实验极图数据中获得取向分布(OD)方面具有明显的优势。离散方法还可用于获得错误取向函数(MOD)和其他描述取向之间相关性的取向特征。对于铜、石英和方解石，这一点已经得到了说明。研究人员现在建议通过推广用于分析单个方位测量的计算机程序并添加用于纹理数据的紧凑表示的分量方法的元素来结束该项目，所有这些都使用离散方法而不是容易引入伪影的调和方法。将向纹理社区提供程序以供测试和应用，以使比主要研究人员的实验室更多的选民受益。这个地质科学项目通过使波兰和美国的顶尖专家能够将互补的人才结合在一起，并在相互感兴趣和能力很强的领域汇集资源，从而实现了促进科学知识的计划目标。***

9411666 Wenk This US-Poland Research project between Dr. Hans-Rudolf Wenk of the University of California-Berkeley, and Dr. Jan Pospiech of the Krupowski Institute for Metals Research of the Polish Academy of Sciences, is a "Texture Analysis with Discrete Methods." Interdisciplinary research between PAN Krakow and UC Berkeley coordinated efforts to obtain quantitative information of orientation characteristics of polycrystalline materials, particularly those with low crystal and sample symmetry which are not only typical in geology but in ceramics and polymer science as well. They showed that discrete methods have distinct advantages to obtain the orientation distribution (OD) from a minimum amount of experimental pole figure data. Discrete methods are also useful to obtain misorientation functions (MOD) and other orientation characteristics describing correlations between orientations. This has been illustrated for copper, quartz and calcite. The researchers now propose to conclude this project by generalizing computer programs for analysis of individual orientation measurements and adding elements of the component method for compact representation of texture data, all using a discrete approach rather than the harmonic method which easily introduces artifacts. Programs will be made available to the texture communities for testing and application to benefit a larger constituency than the laboratories of the principal investigators. This project in geological sciences fulfills the program objective of advancing scientific knowledge by enabling leading experts in Poland and the United States to combine complementary talents and pool resources in areas of strong mutual interest and competence. ***