國立虎尾科技大學 |

Investigation of Different Hatch Strategies on High Entropy Alloy Fabrication by Selective Laser Melting.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Investigation of Different Hatch Strategies on High Entropy Alloy Fabrication by Selective Laser Melting./
作者:	Dhar, Joni Chandra.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	91 p.
附註:	Source: Masters Abstracts International, Volume: 83-05.
Contained By:	Masters Abstracts International83-05.
標題:	Materials science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28647651
ISBN:	9798492732950

Investigation of Different Hatch Strategies on High Entropy Alloy Fabrication by Selective Laser Melting.
Dhar, Joni Chandra.

Investigation of Different Hatch Strategies on High Entropy Alloy Fabrication by Selective Laser Melting. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 91 p.

Source: Masters Abstracts International, Volume: 83-05.

Thesis (M.S.)--The University of Texas Rio Grande Valley, 2021.

This item must not be sold to any third party vendors.

This study investigated the synthesis of CuCrFeNiTiAl high entropy alloy (HEA) from pure elements using selective laser melting (SLM). The objectives are to validate the feasibility of the HEA fabrication from elemental powder materials, and to examine the effect of various hatch strategies and energy densities on the microstructures and other materials properties. 3D samples of CuCrFeNiTiAl alloy were fabricated under different energy densities and with different scan vector lengths. The as-built samples were characterized by X-ray diffraction (XRD), and the microstructures were observed using scanning electron microscopy (SEM). The XRD results showed that face centered cubic, and body centered cubic structures were mostly present in all samples. Analysis of SEM pictures revealed that laser energy density has a correlation with size, shape and area of grains formed. Four types of grain microstructures observed from SEM pictures are dendrites, rosette, petals, and branches type structures. The morphologies of the grain structures were greatly affected by laser scan vector length. Shorter scan vectors facilitated development of more dendritic structures, and larger grains. As the number of grains decreased due to shorter scan lengths, the micro-hardness of the as-built samples was also reduced. Moreover, shorter scan vectors improved the surface quality of the printed samples.

ISBN: 9798492732950Subjects--Topical Terms:

557839
Materials science.
Subjects--Index Terms:

Additive manufacturing

Investigation of Different Hatch Strategies on High Entropy Alloy Fabrication by Selective Laser Melting.
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300 $a 91 p.
500 $a Source: Masters Abstracts International, Volume: 83-05.
500 $a Advisor: Li, Jianzhi.
502 $a Thesis (M.S.)--The University of Texas Rio Grande Valley, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a This study investigated the synthesis of CuCrFeNiTiAl high entropy alloy (HEA) from pure elements using selective laser melting (SLM). The objectives are to validate the feasibility of the HEA fabrication from elemental powder materials, and to examine the effect of various hatch strategies and energy densities on the microstructures and other materials properties. 3D samples of CuCrFeNiTiAl alloy were fabricated under different energy densities and with different scan vector lengths. The as-built samples were characterized by X-ray diffraction (XRD), and the microstructures were observed using scanning electron microscopy (SEM). The XRD results showed that face centered cubic, and body centered cubic structures were mostly present in all samples. Analysis of SEM pictures revealed that laser energy density has a correlation with size, shape and area of grains formed. Four types of grain microstructures observed from SEM pictures are dendrites, rosette, petals, and branches type structures. The morphologies of the grain structures were greatly affected by laser scan vector length. Shorter scan vectors facilitated development of more dendritic structures, and larger grains. As the number of grains decreased due to shorter scan lengths, the micro-hardness of the as-built samples was also reduced. Moreover, shorter scan vectors improved the surface quality of the printed samples.
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653 $a Microstructure
653 $a Selective laser melting
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710 2 $a The University of Texas Rio Grande Valley. $b Department of Manufacturing and Industrial Engineering. $3 1372675
773 0 $t Masters Abstracts International $g 83-05.
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