X射线超快成像原位表征激光增材制造过程研究进展
X-ray ultrafast imaging in-situ characterization of laser additive manufacturing processes:A review
龚来凤 1帅三三 1李雅莉 2黎姗姗 1陈超越 1王江 1任忠鸣1
作者信息
- 1. 上海大学 省部共建高品质特殊钢冶金与制备国家重点实验室,上海 200444;上海大学 材料科学与工程学院,上海 200444
- 2. 中国航发商用航空发动机制造有限责任公司,上海 201306
- 折叠
摘要
在增材制造过程中,熔池经历快速熔化、冷却、凝固的过程,其物理、化学、结构和应力等处于极端非平衡状态,容易导致孔隙、裂纹等缺陷产生,影响制件力学性能.同步辐射X射线具有高空间分辨率和时间分辨率,可以实现增材制造过程中熔池动力学和缺陷演化的原位表征.本文综述了近年来激光增材制造原位实验平台的搭建,并从熔池结构演化、缺陷形成机理和成形工艺优化三个方面介绍了同步辐射X射线原位表征激光增材制造过程的研究进展.最后基于目前增材制造原位观察的局限性,从表征系统改进、原料多样化和计算修正等方面对未来研究进行了展望.
Abstract
During the additive manufacturing process,the molten pool experiences rapid melting,cooling and solidification,and its physical,chemical,structural and stress conditions are in an extreme non-equilibrium state,which can easily lead to defects such as pores and cracks,and affect the mechanical properties of the parts.Synchrotron X-rays,with high spatial and temporal resolution,can be used to achieve in-situ characterization of the melt pool dynamics and defect evolution during the additive manufacturing process.The constructions of in-situ experimental platforms for laser additive manufacturing in recent years were summarized in this paper,and the research progress of synchrotron X-ray in-situ characterization of laser additive manufacturing processes in terms of molten pool structure evolution,defect formation mechanism and forming process optimization were detailly introduced.Finally,based on the limitations of the current in-situ observation of additive manufacturing,future researches were expected in terms of the improvement of the characterization system,diversification of raw materials and computational corrections.
关键词
同步辐射X射线超快成像/激光增材制造/熔池结构演化/缺陷形成原理Key words
synchrotron X-rays ultrafast imaging/laser additive manufacturing/molten pool structure evolution/defect formation mechanism引用本文复制引用
基金项目
国家自然科学基金(52271035)
上海市青年科技启明星项目(21QC1401500)
上海市科委项目(21511103600)
国家重点研发计划(2021YFB3702502)
出版年
2024
NETL
NSTL
维普
万方数据