6061 Aluminum Powder Making and its Thermal and Mechanical Properties

Chen, Yi-Chuan; Tsao, Chi Y.A.; Yang, S.C.; Hsu, Chang Chuan

doi:10.4028/www.scientific.net/amm.152-154.1215

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…Fortunately, previous work by Chen et al reported indentation properties for gas-atomized Al 6061 at depths near 2565 µm in a soft epoxy and measured hardness values between 0.15 and 0.51 GPa [39], which is absolutely far too low for Al 6061 gas-atomized powder and therefore speaks to the limitation of Cao et al's model [8,37,40]. Regardless of the model proposed by [36] that aims to quantify an indentation depth limit, one could alternatively consider the plastic zone radius for a given indentation load and can be defined according to continuum mechanics [41], such that Equation ( 13) is given as…”

Section: On Comparing Indentation Hardnessesmentioning

confidence: 99%

Rapidly Solidified Gas-Atomized Aluminum Alloys Compared with Conventionally Cast Counterparts: Implications for Cold Spray Materials Consolidation

et al. 2020

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In this work, three commercially available aluminum alloy systems (Al 2024, Al 6061, and Al 7075) were considered to explicitly capture the differences in material properties associated with a rapidly solidified, gas-atomized particulate feedstock as compared with their conventionally cast counterparts. Differences between the microstructural, thermodynamic, mechanical, and kinetic behaviors associated with gas-atomized and conventionally bulk counterparts have been tacitly assumed by the cold spray community. However, many researchers continue to utilize legacy properties from bulk materials when simulating particle impact phenomena in silico, for example. By way of recognizing the fact that bulk material properties may not serve as substitutes for gas-atomized powder property input parameters for cold spray process simulation and computation in silico, enhanced cold spray research and development will be more easily achieved. Therefore, understanding the feedstock powder characteristics for use in cold spray can lead to fine-tuning the properties of cold spray consolidations. Optical microscopy, scanning electron microscopy, nanoindentation, microhardness, differential scanning calorimetry, elemental analysis, and cooling rate calculations were utilized. This work confirms preliminary findings that powder alloys may not be treated the same way as their bulk counterparts in so far as the enactment of heat treatment processing parameters are concerned. Specifically, vast discrepancies were found in the grain size, secondary phases, and mechanical behavior between the powder and cast versions of each alloy.

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Section: On Comparing Indentation Hardnessesmentioning

confidence: 99%

Rapidly Solidified Gas-Atomized Aluminum Alloys Compared with Conventionally Cast Counterparts: Implications for Cold Spray Materials Consolidation

et al. 2020

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Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Sousa

Gleason

Haddad

et al. 2020

Metals

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Cold gas-dynamic spray is a solid-state materials consolidation technology that has experienced successful adoption within the coatings, remanufacturing and repair sectors of the advanced manufacturing community. As of late, cold spray has also emerged as a high deposition rate metal additive manufacturing method for structural and nonstructural applications. As cold spray enjoys wider recognition and adoption, the demand for versatile, high-throughput and significant methods of particulate feedstock as well consolidated materials characterization has also become more notable. In order to address the interest for such an instrument, nanoindentation is presented herein as a viable means of achieving the desired mechanical characterization abilities. In this work, conventionally static nanoindentation testing using both Berkovich and spherical indenter tips, as well as nanoindentation using the continuous stiffness measurement mode of testing, will be applied to a range of powder-based feedstocks and cold sprayed materials.

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6061 Aluminum Powder Making and its Thermal and Mechanical Properties

Cited by 2 publications

References 8 publications

Rapidly Solidified Gas-Atomized Aluminum Alloys Compared with Conventionally Cast Counterparts: Implications for Cold Spray Materials Consolidation

Rapidly Solidified Gas-Atomized Aluminum Alloys Compared with Conventionally Cast Counterparts: Implications for Cold Spray Materials Consolidation

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

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