通过为添加剂制造的铁基和镍基合金镀铝提高疲劳寿命

IF 5.3 2区 材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS
A. Kulig , C. Oskay , L. Mengis , B. Nowak , M.C. Galetz , U. Glatzel , H. Daoud
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引用次数: 0

摘要

激光粉末熔床(PBF-LB/M)被广泛应用于各行各业,以制造高精度的复杂零件。高表面粗糙度和孔隙率会对抗疲劳性产生负面影响。本研究提出了一种减少表面粗糙度和提高 AM 零件抗疲劳性的方法--铝包胶结。本文选择了一种铁基合金(合金 800H)和一种镍基合金(合金 699XA)。在 PBF-LB/M 制成的试样中,一部分采用铝包胶合处理,另一部分则采用振动精加工工艺。测量并分析了原样试样、振动精加工试样和镀铝试样的表面粗糙度、微硬度分布和界面区的微观结构。旋转弯曲疲劳试验在室温下进行。在相同的条件下,对两种所研究合金的传统制造试样进行了测试,以评估填料胶结的影响。镀铝试样(PBF-LB/M)的表面粗糙度显著降低,合金 800H 降低了 45%,合金 699XA 降低了 65%。这使得合金 800H 和合金 699XA 的疲劳寿命都得到了提高。相比之下,传统制造的试样在填料固结后的表面粗糙度比初始状态有所增加,耐疲劳性也显著降低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improvement of fatigue life by aluminizing of additive manufactured Fe- and Ni-base alloy
Laser powder bed fusion (PBF-LB/M) is used in various industries to manufacture complex parts with high precision. High surface roughness and porosity have a negative impact on fatigue resistance. This work presents aluminum pack cementation as a method to reduce surface roughness and improve fatigue resistance of AM parts. An Fe-base alloy (Alloy 800H) and a Ni-base alloy (Alloy 699XA) are selected. Some of the specimens made from PBF-LB/M were treated by pack cementation with aluminum, while others were subjected to the vibratory finishing process. The surface roughness, microhardness distribution and the microstructure of the interface zone were measured and analyzed for the as-built, vibratory finished and aluminized specimens. Rotating bending fatigue test was performed at room temperature. Conventionally fabricated specimens of both investigated alloys were tested under the same conditions to evaluate the effects of pack cementation. The aluminized samples (PBF-LB/M) show a significant reduction in surface roughness with a decrease of 45 % for Alloy 800H and 65 % for Alloy 699XA. This leads to an improvement in fatigue life for both Alloy 800H and Alloy 699XA. In contrast, the conventionally fabricated specimens exhibited increased surface roughness after pack cementation compared to their initial condition and showed a significant reduction in fatigue resistance.
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来源期刊
Surface & Coatings Technology
Surface & Coatings Technology 工程技术-材料科学:膜
CiteScore
10.00
自引率
11.10%
发文量
921
审稿时长
19 days
期刊介绍: Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.
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