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Effect of Defects and a Build Pause ...

Richardsen, Simon Douglas,

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Effect of Defects and a Build Pause on Fatigue Life of Additively Manufactured 316L Stainless Steel /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effect of Defects and a Build Pause on Fatigue Life of Additively Manufactured 316L Stainless Steel // Simon Douglas Richardsen.
Author:	Richardsen, Simon Douglas,
Description:	1 electronic resource (59 pages)
Notes:	Source: Masters Abstracts International, Volume: 85-06.
Contained By:	Masters Abstracts International85-06.
Subject:	Mechanics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30637853
ISBN:	9798380873222

Effect of Defects and a Build Pause on Fatigue Life of Additively Manufactured 316L Stainless Steel /
Richardsen, Simon Douglas,

Effect of Defects and a Build Pause on Fatigue Life of Additively Manufactured 316L Stainless Steel /Simon Douglas Richardsen. - 1 electronic resource (59 pages)

Source: Masters Abstracts International, Volume: 85-06.

Build pauses can occur during metal additive manufacturing (AM) with laser beam powder bed fusion (PBF-LB) for a variety of reasons such as power outage, insufficient gas flow, or sensor failure. It is economically desirable to continue a build after the issue is resolved. The effect on part quality, namely microstructure, surface roughness, geometric features, and the impact on the fatigue performance is not well understood. This study considers parts fabricated with a 2-hour build pause in the center of the gauge section. Comparisons of the dimensions, as-printed surface features, microstructure, and fatigue performance are determined. Geometric deviation from part shift during the build pause is significant, however other flaws inherent to AM can also dominate failure depending on severity. A stress intensity factor approach is utilized to determine the influence that the geometric variation and the individual flaws had on the fatigue life. A model is developed to predict and determine part performance after a build pause. Understanding the effect of mechanical changes and geometric shifts from a build pause can help reduce scrap from unintended build interruptions.

English

ISBN: 9798380873222Subjects--Topical Terms:

525881
Mechanics.
Subjects--Index Terms:

Additive manufacturing

Effect of Defects and a Build Pause on Fatigue Life of Additively Manufactured 316L Stainless Steel /
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005 20251021115054.5
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008 261011s2023 miu||||||m |||||||eng d
020 $a 9798380873222
035 $a (MiAaPQD)AAI30637853
035 $a AAI30637853
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Richardsen, Simon Douglas, $e author. $3 3826505
245 1 0 $a Effect of Defects and a Build Pause on Fatigue Life of Additively Manufactured 316L Stainless Steel / $c Simon Douglas Richardsen.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 1 electronic resource (59 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-06.
500 $a Advisors: Gockel, Joy Committee members: Findley, Kip; Brice, Craig.
502 $b M.S. $c Colorado School of Mines $d 2023.
520 $a Build pauses can occur during metal additive manufacturing (AM) with laser beam powder bed fusion (PBF-LB) for a variety of reasons such as power outage, insufficient gas flow, or sensor failure. It is economically desirable to continue a build after the issue is resolved. The effect on part quality, namely microstructure, surface roughness, geometric features, and the impact on the fatigue performance is not well understood. This study considers parts fabricated with a 2-hour build pause in the center of the gauge section. Comparisons of the dimensions, as-printed surface features, microstructure, and fatigue performance are determined. Geometric deviation from part shift during the build pause is significant, however other flaws inherent to AM can also dominate failure depending on severity. A stress intensity factor approach is utilized to determine the influence that the geometric variation and the individual flaws had on the fatigue life. A model is developed to predict and determine part performance after a build pause. Understanding the effect of mechanical changes and geometric shifts from a build pause can help reduce scrap from unintended build interruptions.
546 $a English
590 $a School code: 0052
650 4 $a Mechanics. $3 525881
650 4 $a Mechanical engineering. $3 649730
653 $a Additive manufacturing
653 $a Fatigue performance
653 $a Stainless steel
653 $a Stress intensity factor
690 $a 0346
690 $a 0548
710 2 $a Colorado School of Mines. $b Mechanical Engineering. $e degree granting institution. $3 3821524
720 1 $a Gockel, Joy $e degree supervisor.
773 0 $t Masters Abstracts International $g 85-06.
790 $a 0052
791 $a M.S.
792 $a 2023
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30637853