Development of a System for In-Process Characterization of Properties and Forming Characteristics of Copper Alloy Strip

该提案旨在开发和演示一个系统，用于 代表属性的签名的过程表征 从而提高了铜合金的冲压成形性能 地带 开发将通过联合应用来完成 三种技术（声学、涡流和X射线衍射） 用于多晶金属合金的非侵入式表征。 这些非接触式技术是专门为他们选择的。 免费的自然和真实的时间能力。 选择是 这是NSF先前授予的结果。 选择的每种技术 组合的测量对不同的 特性，因此将提供一个敏感的系统， 测量这些特征中相互依赖的变化。 的 三种技术将完成不同体积的询问 由于所提供的探测深度不同， 通过团队系统。 将采用实验方法， 开发和演示系统。 关系将得到发展 将所述成组签名与所述机械性能相关联，以及 铜合金带材的冲压成形特性。 电子铜合金带被选为 开关和触点的材料和制造， 形成过程中要重点关注。 制定的方法 这项结合各种测量的工作应该具有通用性， 并允许应用于其他材料和工艺。 的 三种测量技术的组合应用是新颖的。 这项研究应导致过程中测量 变形金属的性能和制造特点 合金，这将导致显着改善， 生产力和质量。

This proposal is to develop and demonstrate a system for in- process characterization of a signature representing the properties and thus the stamping and forming characteristics of copper alloy strip. The development will be accomplished by combined application of three techniques (acoustic, eddy current, and X-ray diffraction) for non-intrusive characterization of polycrystalline metal alloys. These non-contact techniques were specifically selected for their complimentary nature and real time capabilities. Selection was the result of a prior NSF grant. Each of the techniques selected for the combined measurements is sensitive to different sets of characteristics and thus will provide a sensitive system for measuring interdependent changes in these characteristics. The three techniques will accomplish interrogation of different volumes of the subject material due to the various depth of probing offered by the teamed system. An experimental approach will be employed to develop and demonstrate the system. Relations will be developed relating the teamed signature to the mechanical properties and stamping and forming characteristics of the copper alloy strip. Electronic copper alloy strip was selected as the class of materials and the fabrication of switches and contacts as the forming process on which to focus. The methodology developed by this work for combining various measurements should have generic value and permit application to other materials and processes. The combined application of the three measurement techniques is novel. This research should lead to in-process measurement of properties and fabrication characteristics of wrought metallic alloys which should result in significant improvement in productivity and quality.