Journal article
Rapid Thermal Treatment of Oriented Microstructures to Generate Fine Globular Grains
JOM (1989), v 76(9), pp 5014-5024
01 Sep 2024
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Metal additive manufacturing through fused filament fabrication (FFF) has recently been gaining traction owing to its simplicity, cost benefit, and suitability to a wide range of starting materials, as compared to alternative technologies. The generation of a thixotropic (globular) microstructure is fundamental to obtaining the desired flow behavior in the semi-solid material. Although numerous studies have explored the possibility to print extruded filaments, a scalable process for manufacturing 3D-printable filaments is yet to be established. Drawn filaments possess similar microstructures to extruded filaments and are commercially produced. In this study, we demonstrate that small globular grains (similar to 10 mu m) can be generated in a cold-drawn filament of a Zn-Al alloy using rapid thermal treatment. The filaments were heated to different temperatures (375 degrees C, 385 degrees C, 400 degrees C, 420 degrees C, and 450 degrees C) using a molten salt bath. The larger heat transfer coefficient of the molten salt bath, compared to convective heating, drastically reduced the time required to achieve the target temperature to a few seconds. Higher set temperatures led to quicker transformation into globular microstructure due to Rayleigh instability and resulted in smaller initial grain sizes. Longer treatment times promoted grain coarsening due to Ostwald ripening. Such a pretreatment may enable fine resolution printing using thixotropic filaments.
Metrics
1 Record Views
Details
- Title
- Rapid Thermal Treatment of Oriented Microstructures to Generate Fine Globular Grains
- Creators
- Sathyanarayan Sairam Jaishankar - Georgia Institute of TechnologyDonggang Yao (Corresponding Author) - Georgia Institute of TechnologyJack G. Zhou - Drexel University
- Publication Details
- JOM (1989), v 76(9), pp 5014-5024
- Publisher
- Springer Nature
- Number of pages
- 11
- Grant note
- National Science Foundation; National Science Foundation (NSF) 2027871; 2027823 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001182150000005
- Scopus ID
- 2-s2.0-85187878201
- Other Identifier
- 991022202494904721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
Source: SDGs in the Output
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Mineralogy
- Mining & Mineral Processing