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Fabrication of 304L Stainless Steel and Aluminum Parts by Laser Foil Printing and Process Automation.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Fabrication of 304L Stainless Steel and Aluminum Parts by Laser Foil Printing and Process Automation./
Author:	Hung, Chia-Hung.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	124 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
Contained By:	Dissertations Abstracts International83-02B.
Subject:	Morphology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28321672
ISBN:	9798522983826

Fabrication of 304L Stainless Steel and Aluminum Parts by Laser Foil Printing and Process Automation.
Hung, Chia-Hung.

Fabrication of 304L Stainless Steel and Aluminum Parts by Laser Foil Printing and Process Automation. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 124 p.

Source: Dissertations Abstracts International, Volume: 83-02, Section: B.

Thesis (Ph.D.)--Missouri University of Science and Technology, 2021.

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

This work presents research conducted on a novel metal additive manufacturing process, called Laser Foil Printing (LFP), to fabricate metal parts with various geometries layer by layer using metal foil as the feedstock. To investigate the processability and characteristics of LFP for fabricating metal parts, the materials included 304L stainless steel and Al-1100 aluminum alloy. The LFP process parameter windows for both 304L and Al-1100 were determined, and the optimal process parameters with stable formation of the melt pools were selected to fabricate dense metal parts. The microstructure and properties of LFP-fabricated parts were characterized and analyzed using tensile testing, scanning electron microscopy, electron backscattered diffraction, and ANOVA analysis. The mechanical properties of fabricated parts were compared with those of parts fabricated by the Laser Powder Bed Fusion (L-PBF) process. The results showed that the 304L parts fabricated by LFP were 10-20% higher in strength and ductility than those fabricated by L-PBF due to the finer grains formed by faster cooling in LFP. Also, oxidation in LFP-fabricated parts was less compared with that in L-PBF fabricated parts because of smaller surface area in metal foil compared with metal powder. The density (> 99.3%) of Al-1100 aluminum alloy parts fabricated by LFP was much higher than the density (< 90%) of Al-1100 parts fabricated by L-PBF because of no air gaps in foil like those in powder particles. A fully automated LFP system was constructed and used to automatically fabricate 304L parts with various geometries. The parts’ dimensional accuracies and their mechanical properties were measured. These parts exhibited higher tensile strength than those fabricated by other laser additive manufacturing technologies.

ISBN: 9798522983826Subjects--Topical Terms:

1183868
Morphology.
Subjects--Index Terms:

304L stainless steel

Fabrication of 304L Stainless Steel and Aluminum Parts by Laser Foil Printing and Process Automation.
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100 1 $a Hung, Chia-Hung. $3 1372518
245 1 0 $a Fabrication of 304L Stainless Steel and Aluminum Parts by Laser Foil Printing and Process Automation.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 124 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
500 $a Advisor: Leu, Ming C.
502 $a Thesis (Ph.D.)--Missouri University of Science and Technology, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a This work presents research conducted on a novel metal additive manufacturing process, called Laser Foil Printing (LFP), to fabricate metal parts with various geometries layer by layer using metal foil as the feedstock. To investigate the processability and characteristics of LFP for fabricating metal parts, the materials included 304L stainless steel and Al-1100 aluminum alloy. The LFP process parameter windows for both 304L and Al-1100 were determined, and the optimal process parameters with stable formation of the melt pools were selected to fabricate dense metal parts. The microstructure and properties of LFP-fabricated parts were characterized and analyzed using tensile testing, scanning electron microscopy, electron backscattered diffraction, and ANOVA analysis. The mechanical properties of fabricated parts were compared with those of parts fabricated by the Laser Powder Bed Fusion (L-PBF) process. The results showed that the 304L parts fabricated by LFP were 10-20% higher in strength and ductility than those fabricated by L-PBF due to the finer grains formed by faster cooling in LFP. Also, oxidation in LFP-fabricated parts was less compared with that in L-PBF fabricated parts because of smaller surface area in metal foil compared with metal powder. The density (> 99.3%) of Al-1100 aluminum alloy parts fabricated by LFP was much higher than the density (< 90%) of Al-1100 parts fabricated by L-PBF because of no air gaps in foil like those in powder particles. A fully automated LFP system was constructed and used to automatically fabricate 304L parts with various geometries. The parts’ dimensional accuracies and their mechanical properties were measured. These parts exhibited higher tensile strength than those fabricated by other laser additive manufacturing technologies.
590 $a School code: 0587.
650 4 $a Morphology. $3 1183868
650 4 $a Physical properties. $3 1175985
650 4 $a Alloys. $3 596847
650 4 $a Stainless steel. $3 716611
650 4 $a Fractures. $3 645746
650 4 $a Aluminum alloys. $3 1011367
650 4 $a Ductility. $3 1372524
650 4 $a Rapid prototyping. $3 636578
650 4 $a Lasers. $3 557748
650 4 $a Corrosion resistance. $3 1011357
650 4 $a Cooling. $3 812392
650 4 $a Tensile strength. $3 1215672
650 4 $a Raw materials. $3 1113584
650 4 $a Processing speed. $3 1372523
650 4 $a Heat conductivity. $3 1372522
650 4 $a Aerospace engineering. $3 686400
650 4 $a Microstructure. $3 643376
650 4 $a Grain size. $3 1372521
650 4 $a Energy. $3 784773
650 4 $a Illustrations. $3 1372520
650 4 $a Solidification. $3 685755
650 4 $a Investigations. $3 1372519
650 4 $a Science. $3 574162
650 4 $a Engineering. $3 561152
653 $a 304L stainless steel
653 $a Aluminum alloys
653 $a AM metal parts
653 $a Laser additive manufacturing
653 $a Laser foil printing
653 $a Laser welding modes
690 $a 0537
690 $a 0791
690 $a 0287
690 $a 0538
710 2 $a Missouri University of Science and Technology. $b Mechanical Engineering. $3 1213808
773 0 $t Dissertations Abstracts International $g 83-02B.
790 $a 0587
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28321672