{"title":"Effects of melt-pool geometry on grain structure evolution in multilayer laser metal deposition of a single-crystal superalloy","authors":"Jingyi Zhang , Peiyu Zhang , Wenqian Zhang , Shili Tan , Xin Zhou","doi":"10.1016/j.matlet.2024.137705","DOIUrl":null,"url":null,"abstract":"<div><div>The effects of melt-pool geometry on grain structure evolution in the multilayer laser metal deposition of a single-crystal superalloy are analyzed. The spatiotemporal variations in geometrical features not only affect the grain growth patterns in each layer but also lead to different overlapping behaviors and resultant substrate conditions. The initial melt pool with a large depth-to-height ratio generally contributes to sustaining the continual epitaxial growth; otherwise, a triangle-shaped columnar region with grain orientation alternatively changed can be formed.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137705"},"PeriodicalIF":2.7000,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Letters","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167577X24018457","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The effects of melt-pool geometry on grain structure evolution in the multilayer laser metal deposition of a single-crystal superalloy are analyzed. The spatiotemporal variations in geometrical features not only affect the grain growth patterns in each layer but also lead to different overlapping behaviors and resultant substrate conditions. The initial melt pool with a large depth-to-height ratio generally contributes to sustaining the continual epitaxial growth; otherwise, a triangle-shaped columnar region with grain orientation alternatively changed can be formed.
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
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