Collaborative Research: Composite Surfacing of Amorphous Materials by Laser Interference Nanopatterning

合作研究：激光干涉纳米图案化非晶材料复合表面处理

• 批准号: 0969249
• 负责人: Narendra Dahotre
• 金额: $ 20.89万
• 依托单位: University of North Texas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0969249&HistoricalAwards=false
• 关键词: Collaborative; Research; Composite; Surfacing; Amorphous

The goal of this collaborative research grant is the development of a novel laser-based surface engineering technique to enhance the ductility of non-crystalline materials, primarily metals. Laser interference patterning will be employed to produce modified regions of periodic lines or dots of localized ultrafine grain structure with residual stresses on the surface of these materials. The major objectives of the research are (i) to identify the thermo-physical effects associated with the interaction of modulated laser intensity during interference patterning and (ii) to characterize the modulated microstructure, crystallization dynamics, and distribution of residual stresses during laser patterning. These objectives will be instrumental in establishing the role of surface modification on enhancing global plasticity of the non-crystalline materials. Finally, a computational model based on the thermo-physical interactions associated with laser interference patterning of non-crystalline material surfaces for tailoring the effects will be developed.Successful completion of this project on laser interference patterning will significantly advance the state-of-the-art in ductilization of inherently brittle non-crystalline alloys leading to wider acceptance of these materials for advanced structural applications. The research will elucidate the fundamental mechanisms of plasticity enhancement of non-crystalline materials through design of periodic surface structures consisting of original non-crystalline regions and regions of ultrafine grain structure with residual stresses. Through synergistic computational and experimental approach, the research is expected to establish a methodology for design and synthesis of next generation structural materials system. Furthermore, the collaborative project will provide opportunities for students to work on novel and advanced processing methods and materials and will help prepare diverse and capable workforce of next generation global scientists/engineers.

这项合作研究资助的目标是开发一种新型的基于激光的表面工程技术，以增强非晶材料（主要是金属）的延展性。将采用激光干涉图案来产生局部超细晶粒结构的周期线或点的修改区域，这些材料的表面上具有残余应力。该研究的主要目标是（i）确定干涉图案化过程中与调制激光强度相互作用相关的热物理效应，以及（ii）表征激光图案化过程中的调制微观结构、结晶动力学和残余应力分布。这些目标将有助于确定表面改性在增强非晶材料整体可塑性方面的作用。最后，将开发一个基于与非晶材料表面激光干涉图案化相关的热物理相互作用的计算模型，以定制效果。成功完成该激光干涉图案化项目将显着推进固有脆性非晶态合金延展性的最先进水平，从而使这些材料在先进结构应用中得到更广泛的接受。该研究将通过设计由原始非晶区域和具有残余应力的超细晶结构区域组成的周期性表面结构，阐明非晶材料塑性增强的基本机制。 通过协同计算和实验方法，该研究有望建立下一代结构材料系统的设计和合成方法。此外，该合作项目将为学生提供研究新颖、先进的加工方法和材料的机会，并将帮助培养下一代全球科学家/工程师的多元化和有能力的劳动力队伍。