Laser Powder Bed Fusion of Inconel 718 Tools for Cold Deep Drawing Applications: Optimization of Printing and Post-processing Parameters

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aut.relation.articlenumber4707
aut.relation.endpage4707
aut.relation.issue13
aut.relation.journalMaterials
aut.relation.startpage4707
aut.relation.volume16
dc.contributor.authorJiang, Cho-Pei
dc.contributor.authorMaidhah, Andi Ard
dc.contributor.authorWang, Shun-Hsien
dc.contributor.authorWang, Yuh-Ru
dc.contributor.authorPasang, Tim
dc.contributor.authorRamezani, Maziar
dc.date.accessioned2023-07-10T04:09:12Z
dc.date.available2023-07-10T04:09:12Z
dc.date.issued2023-06-29
dc.description.abstractInconel 718 (IN 718) powder is used for a laser powder bed fusion (LPBF) printer, but the mechanical properties of the as-built object are not suited to cold deep drawing applications. This study uses the Taguchi method to design experimental groups to determine the effect of various factors on the mechanical properties of as-built objects produced using an LPBF printer. The optimal printing parameters are defined using the result for the factor response to produce an as-built object with the greatest ultimate tensile strength (UTS), and this is used to produce a specimen for post-processing, including heat treatment (HT) and surface finishing. The HT parameter value that gives the maximum UTS is the optimal HT parameter. The optimal printing and HT parameter values are used to manufacture a die and a punch to verify the suitability of the manufactured tool for deep drawing applications. The experimental results show that the greatest UTS is 1091.33 MPa. The optimal printing parameters include a laser power of 190 W, a scanning speed of 600 mm/s, a hatch space of 0.105 mm and a layer thickness of 40 μm, which give a UTS of 1122.88 MPa. The UTS for the post-processed specimen increases to 1511.9 MPa. The optimal parameter values for HT are heating to 720 °C and maintaining this temperature for 8 h, decreasing the temperature to 620 °C and maintaining this temperature for 8 h, and cooling to room temperature in the furnace. Surface finishing increases the hardness to HRC 55. Tools, including a punch and a die, are manufactured using these optimized parameter values. The deep drawing experiment demonstrates that the manufactured tools that are produced using these values form a round cup of Aluminum alloy 6061. The parameter values that are defined can be used to manufacture IN 718 tools with a UTS of more than 1500 MPa and a hardness of more than 50 HRC, so these tools are suited to cold deep drawing specifications.
dc.identifier.citationMaterials, ISSN: 1996-1944 (Print); 1996-1944 (Online), MDPI AG, 16(13), 4707-4707. doi: 10.3390/ma16134707
dc.identifier.doi10.3390/ma16134707
dc.identifier.issn1996-1944
dc.identifier.issn1996-1944
dc.identifier.urihttp://hdl.handle.net/10292/16401
dc.languageen
dc.publisherMDPI AG
dc.relation.urihttps://www.mdpi.com/1996-1944/16/13/4707
dc.rights.accessrightsOpenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject4014 Manufacturing Engineering
dc.subject40 Engineering
dc.subject03 Chemical Sciences
dc.subject09 Engineering
dc.subject34 Chemical sciences
dc.subject40 Engineering
dc.titleLaser Powder Bed Fusion of Inconel 718 Tools for Cold Deep Drawing Applications: Optimization of Printing and Post-processing Parameters
dc.typeJournal Article
pubs.elements-id512842
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