梯度纳米结构材料疲劳性能的研究现状  

Research Status in Fatigue Properties of Gradient Nanostructured Materials

作　　者：刘洋 吴利翔 王诗槐 马海滨 葛洪恩 廖业宏 任啟森 LIU Yang;WU Lixiang;WANG Shihuai;MA Haibin;GE Hongen;LIAO Yehong;REN Qisen(Institute of Nuclear Fuel and Materials,CGN Research Institute Co.,Ltd.,Shenzhen 518026,China;Engineering Laboratory of High-Safety Fault-Tolerant Fuel Technology,Shenzhen Nuclear Power Plant,Shenzhen 518026,China)

机构地区：[1]中广核研究院有限公司核燃料与材料研究所,广东深圳518026 [2]深圳核电站高安全性事故容错燃料技术工程实验室,广东深圳518026

出　　处：《热加工工艺》2024年第16期15-19,共5页Hot Working Technology

基　　金：国家自然科学基金重点支持项目(U20B20-27);广东省自然科学基金-面上项目(2022A1515010735);中国博士后科学基金面上基金项目(2021M703024)。

摘　　要：在原始晶粒尺寸较大的基体上构建一层梯度纳米结构层可有效提升材料疲劳性能已得到证实。介绍了表面纳米化技术制备工艺方法,并对其特点进行描述。随后总结了不同制备工艺、不同交变应力状态梯度纳米结构材料疲劳性能研究结果,并就梯度纳米结构层对疲劳性能的影响进行分析。相比于直接在金属材料表面涂敷涂层,经过表面纳米化处理后的基体表面制备或涂敷涂层材料会显著改善疲劳性能。针对梯度纳米结构材料热稳定性问题进行讨论,总结了提高热稳定性的理论方法,以为后续高温疲劳性能改善提供参考。It has been proved that the fatigue performance of the material could be improved by constructing a gradient nanostructure layer on the substrate with large original grain size.The preparation process of surface nanocrystallization technology was introduced to describe its characteristics.Subsequently,the results on the fatigue performance of gradient nanostructure materials under different preparation processes and different alternating stress states were summarized.Simultaneously,the influence of gradient nanostructure layer on the fatigue properties was analyzed.Compared with the coating prepared on the surface of the metal materials directly,the fatigue performance of the coating after surface nanocrystallization improves.Finally,the thermal stability of gradient nanostructure materials was analyzed,and the theoretical methods for improving the thermal stability were summarized,which can provide reference for further improvement of high temperature fatigue performance.

关 键 词：梯度纳米结构 疲劳性能 热稳定性 

分 类 号：TG113.2[金属学及工艺—物理冶金]