多因素耦合的激光熔覆层应力及应力损伤的超声波评价物理机制

项目名称： 多因素耦合的激光熔覆层应力及应力损伤的超声波评价物理机制

项目编号： No.51305172

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 刘彬

作者单位： 江苏科技大学

项目金额： 25万元

中文摘要： 针对机械关键再制造零部件质量无损评价问题，以提高其服役寿命及安全可靠性为目标，基于多因素耦合影响激光熔覆层质量的思路，研究缺陷、初始残余应力与外加应力交互作用下激光熔覆层应力与应力损伤的超声波评价物理机制与方法。基于超声波与激光熔覆层组织结构的相互作用规律，明确激光熔覆层超声波信号分析理论，构建无宏观缺陷去应力退火激光熔覆层（简称SLCC）试样应力及应力损伤与其特征参量间的关联，揭示其响应机制，在单一因素研究基础上，实现多因素交互作用影响SLCC试样应力及应力损伤评价机理的研究，获得其理论模型。本项目研究内容体现材料学、声学与无损检测理论学科的交叉，为实现机械关键再制造零部件质量及服役寿命的快速无损评价提供理论与技术支持。

中文关键词： 激光熔覆层；应力；应力损伤；超声波；评价

英文摘要： Based on non-destructive evaluation of remanufacturing key component quality, improving the service life and reliability of remanufacturing component is seen as the goal,with the idea of laser cladding coating quality affected by factors, the effect of flaw, initial residual stress and applied stress on stress and stress damage with ultrasonic wave is investigated, and the evaluation physical mechanism is researched. The interaction physical model between ultrasonic wave and microstructure of laser cladding coating is bulit, theory of ultrasonic wave signal anslysis is cleared. Be the non-flaw and non-initial residual stress laser cladding coating (abbreviation SLCC) sample as studied object, the characteristic parameters for stress and stress damage evaluation will be studied, the relationship between characteristic parameters and stress, stress damage will be confirmed, the evaluation mechanism will be investigated. Based on the research of single influence factor on evaluation result, the combining effect of flaw, initial residual stress and applied stress attribute to the result will be analyzed, and the influence mechanism will also be clarified. The project shows the intercross and coalescence among the subjects of materials science,acoustics science and non-destructive testing science, as to provide the t

英文关键词： laser cladding coating；stress；stress damage；ultrasonic wave；evaluation