首页|X射线超快成像原位表征激光增材制造过程研究进展

X射线超快成像原位表征激光增材制造过程研究进展

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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.
X-ray ultrafast imaging in-situ characterization of laser additive manufacturing processes:A review
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.

synchrotron X-rays ultrafast imaginglaser additive manufacturingmolten pool structure evolutiondefect formation mechanism

龚来凤、帅三三、李雅莉、黎姗姗、陈超越、王江、任忠鸣

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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

中国航发商用航空发动机制造有限责任公司,上海 201306

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

国家自然科学基金上海市青年科技启明星项目上海市科委项目国家重点研发计划

5227103521QC1401500215111036002021YFB3702502

2024

10.11817/j.ysxb.1004.0609.2023-44313

中国有色金属学报
中国有色金属学会

中国有色金属学报

CSTPCD北大核心
影响因子：1.108
ISSN：1004-0609
年,卷(期)：2024.34(4)
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