Effect of Laser Beam Oscillation Process on the Interlaminar Region of Inconel 625 Alloy Thin-Walled Structure Fabricated by Oscillating Laser Additive Manufacturing

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-04-04 DOI:10.1007/s12540-024-01660-6

Fuyuan Zhang, Yi Luo, Shuqing Yang, Yanrui Peng, Tao Yang, Juan Liu

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引用次数: 0

Abstract

In the multilayer thin-walled Inconel 625 alloy structures fabricated by the laser additive manufacturing (LAM) process, the poor plasticity of the interlaminar region often leads to structural fractures. In this paper, an oscillating LAM (O-LAM) technology using a transverse linear beam oscillation (LBO) process was proposed, and the effect of laser scanning speed on the forming accuracy, microstructure, crystallographic texture, and mechanical properties of interlaminar region was studied. The results show that the LBO process refined the grains and increased the number and length of high-angle grain boundaries in the interlaminar region. In addition, the LBO process with high laser scanning speed weakened the preferential orientation along the directions of laser scanning and deposition build-up. In particular, the dominant crystallographic textures of {\(\overline{1 }10\)} <\(\overline{1 }\overline{1 }1\)> and {\(\overline{2 }21\)} <\(\overline{1 }\overline{1 }0\)> in the interlaminar region were significantly reduced. The analysis of the Schmidt factor and the results of nano-indentation test show that the LBO process with high laser scanning speed reduced the stress concentration, and the elastic modulus and dislocation density in the interlaminar region. Therefore, the LBO process with high laser scanning speed can improve the plasticity and relieve the stress concentration of the interlaminar region, which is conducive to improving the overall mechanical properties of the Inconel 625 alloy multilayer thin-walled structure.

Graphical Abstract

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激光束振荡过程对振荡激光快速成型技术制造的 Inconel 625 合金薄壁结构层间区域的影响

在采用激光增材制造（LAM）工艺制造的多层薄壁 Inconel 625 合金结构中，层间区域的塑性较差往往会导致结构断裂。本文提出了一种采用横向线性光束振荡（LBO）工艺的振荡 LAM（O-LAM）技术，并研究了激光扫描速度对层间区域的成形精度、微观结构、晶体纹理和力学性能的影响。结果表明，LBO 工艺细化了晶粒，增加了层间区高角度晶界的数量和长度。此外，高激光扫描速度下的 LBO 工艺削弱了沿激光扫描和沉积堆积方向的优先取向。特别是，层间区域的{(\overline{1 }10\)} <\(\overline{1 }overline{1 }1\)> 和{(\overline{2 }21\)} <\(\overline{1 }overline{1 }0\)> 的主要晶体学纹理明显减少。对 Schmidt 因子和纳米压痕测试结果的分析表明，高激光扫描速度的 LBO 工艺降低了层间区域的应力集中、弹性模量和位错密度。因此，高激光扫描速度下的 LBO 工艺可以改善层间区域的塑性，缓解层间区域的应力集中，有利于提高 Inconel 625 合金多层薄壁结构的整体力学性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.