Microstructures and properties of selective laser melted K447A/IN718 Ni-based superalloy composites

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2025-04-18 DOI:10.1016/j.matlet.2025.138598

Yu Zhang , Zhen Ding , Bing Tian , Fengchun Jiang , Mehrdad Zarinejad , Yunxiang Tong

引用次数: 0

Abstract

Additive manufacturing (AM) has become a crucial technique for fabricating high-performance superalloys. K447A, a promising candidate for high-temperature applications, exhibits significant cracking issues during AM processing. In this study, a mixture of K447A and IN718 powders was processed via selective laser melting (SLM) to enhance mechanical properties and minimize cracking. The optimal composition was identified as KI28 (20% K447A, 80% IN718). Microstructural analysis revealed that KI28 exhibited the smallest laser melt pool area and a short-chain Laves phase morphology, reducing crack formation. Additionally, mechanical testing demonstrated that the increased IN718 content improved tensile strength and ductility. These findings provide valuable insights for optimizing Ni-based superalloys through AM processing.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

选择性激光熔化K447A/IN718镍基高温合金复合材料的组织与性能

增材制造（AM）已成为制造高性能高温合金的关键技术。K447A是一种很有前途的高温应用候选者，在AM加工过程中表现出明显的开裂问题。在本研究中，通过选择性激光熔化（SLM）处理K447A和IN718粉末的混合物，以提高机械性能并减少开裂。经鉴定，最佳组合为KI28 （20% K447A, 80% IN718）。显微组织分析表明，KI28具有最小的激光熔池面积和短链Laves相形态，减少了裂纹的形成。此外，力学试验表明，IN718含量的增加提高了拉伸强度和塑性。这些发现为通过增材制造工艺优化镍基高温合金提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

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