CAREER: Fundamental Studies on Ultrasonic Vibration Assisted Laser Surface Modification (UV-LSM) of Materials

职业：材料超声波振动辅助激光表面改性 (UV-LSM) 的基础研究

• 批准号: 1149079
• 负责人: Sandip Harimkar
• 金额: $ 40万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1149079&HistoricalAwards=false
• 关键词: CAREER; Fundamental; Studies; Ultrasonic; Vibration

This Faculty Early Career Development (CAREER) grant provides funding for the development of novel ultrasonic vibration-assisted laser processes for the surface modifications of advanced materials, including light alloys, metal matrix composites (MMCs), and porous ceramics. The proposed processing approach is expected to achieve refined grain structure in light alloys, deeper penetration of ceramic reinforcement in metal matrix composites, and denser crack-free surfaces in porous ceramics. The research project will investigate the effect of combined laser operation and ultrasonic vibrations on the development of microstructure and properties of these materials. The microstructural features such as grain size (light alloys), depth of particle penetration (MMCs), and depth of infiltration (porous ceramics) will be characterized using combination of experimental and computational approaches. The effect of these microstructural features on hardness, strength, corrosion/wear resistance, and residual stress state of the modified surfaces will be systematically investigated. Major emphasis of the proposed activities will be on establishing processing-microstructure-properties relationships for these advanced materials. If successful, the proposed project will significantly advance the state-of-the-art in laser surface engineering for improving surface properties of materials. The development of these new ultrasonic vibration assisted laser surface modification processes will accelerate the utilization of surface modified light alloys, MMCs, and porous ceramics in wider applications requiring improved performance. In addition, the proposed project will provide unique hands-on-experience opportunities to the diverse groups of undergraduate and graduate students to prepare them for future career in this important field of manufacturing research. The results of this research project will be widely disseminated to the academic, research, and manufacturing community through journal publications, conference presentations, and proceedings.

这项教师的早期职业发展（职业）赠款为开发新型超声振动辅助激光过程提供了资金，用于对高级材料的表面修饰，包括轻质合金，金属基质复合材料（MMC）和多孔陶瓷。预计所提出的加工方法将在光合金中实现精致的晶粒结构，在金属基质复合材料中更深的陶瓷钢筋以及多孔陶瓷中的无裂纹表面。该研究项目将研究激光操作和超声振动对这些材料的微结构和性质发展的影响。使用实验和计算方法的组合来表征微结构特征，例如晶粒尺寸（轻质合金），颗粒穿透深度（MMC）和浸润深度（多孔陶瓷）。这些微观结构特征对硬度，强度，腐蚀/耐磨性以及修饰表面的残留应力状态的影响将被系统地研究。拟议活动的主要重点将是建立这些高级材料的加工微观建筑关系。如果成功的话，拟议的项目将显着提高激光表面工程的最新技术，以改善材料的表面特性。在更广泛的应用中，这些新的超声振动辅助激光表面修饰过程的开发将加速表面修饰的光合金，MMC和多孔陶瓷的利用，需要提高性能。此外，拟议的项目将为各种本科生和研究生群体提供独特的亲身经验机会，以便在这一重要的制造业研究领域为未来的职业做好准备。该研究项目的结果将通过期刊出版物，会议演示和程序广泛传播到学术，研究和制造业社区。