Comparison of microstructure and mechanical properties of GH4099 superalloys manufactured by L-DED and L-PBF

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-05-03 DOI:10.1016/j.matlet.2025.138686

Xinyu Zhang , Yongfeng Liang , Gengwu Ge , Gang Yang , Feng Yi , Junpin Lin

引用次数: 0

Abstract

GH4099 superalloys with typical dendritic/cellular structures were manufactured and studied the microstructure evolution after hot isostatic pressing (HIP) and heat treatment (HT) using laser-powder bed fusion (L-PBF) and laser-directed energy deposition (L-DED), respectively. The results indicate that due to grain size and distribution differences, L-PBF alloy has higher strength and L-DED alloy has better plasticity at room temperature. In contrast, at high temperatures, the strengthening of grain boundaries is weakened, and the strength of the two is similar.

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L-DED和L-PBF制备GH4099高温合金的显微组织和力学性能比较

制备了具有典型枝晶/细胞结构的GH4099高温合金，并分别研究了热等静压（HIP）和激光粉末床熔合（L-PBF）热处理（HT）和激光定向能沉积（L-DED）热处理后的显微组织演变。结果表明：由于晶粒尺寸和分布的差异，L-PBF合金具有较高的室温强度，L-DED合金具有较好的室温塑性。相反，在高温下，晶界的强化减弱，两者的强度相似。

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

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive