Residual stress investigation in additively manufactured samples

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F20%3AN0000039" target="_blank" >RIV/26316919:_____/20:N0000039 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1757-899X/723/1/012032/pdf" target="_blank" >https://iopscience.iop.org/article/10.1088/1757-899X/723/1/012032/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/723/1/012032" target="_blank" >10.1088/1757-899X/723/1/012032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Residual stress investigation in additively manufactured samples

Popis výsledku v původním jazyce

In the present study, additively manufactured (AM) samples of different sizes were analysed by the contour method (CM). Builds of three different volumes were examined to determine the influence of residual stress (RS) distribution along the z-axis on volumetric changes in the part. They were made using the direct energy deposition (DED) technique. Only a handful of reports cover the use of CM for finding the RS distribution in DED builds. This study aims to complement those with new findings. The contour method is a destructive technique whose main advantages are the absence of sample size limits and the ability to predict residual stresses at greater depths than other methods. In this study, residual stresses were evaluated in three stainless steel samples (35×35×35 mm, 25×25×25 mm, 15×15×15 mm) prepared by the DED method. Stainless steel 316L powder was blown into a melt pool created by a high energy laser source. The melted powder solidifies as the laser head moves along a predefined path. In order to protect the material from oxidation during deposition, argon is used as a shielding gas-fed continuously to the melt pool. 316L austenitic stainless steel was chosen for this experiment because it undergoes no phase transformations during deposition. This reduces the complexity of the metallurgical processes involved. Evaluation of the sections produced by the contour method was carried out using an optical precision measuring machine (3D scanner) and FE software.

Název v anglickém jazyce

Residual stress investigation in additively manufactured samples

Popis výsledku anglicky

In the present study, additively manufactured (AM) samples of different sizes were analysed by the contour method (CM). Builds of three different volumes were examined to determine the influence of residual stress (RS) distribution along the z-axis on volumetric changes in the part. They were made using the direct energy deposition (DED) technique. Only a handful of reports cover the use of CM for finding the RS distribution in DED builds. This study aims to complement those with new findings. The contour method is a destructive technique whose main advantages are the absence of sample size limits and the ability to predict residual stresses at greater depths than other methods. In this study, residual stresses were evaluated in three stainless steel samples (35×35×35 mm, 25×25×25 mm, 15×15×15 mm) prepared by the DED method. Stainless steel 316L powder was blown into a melt pool created by a high energy laser source. The melted powder solidifies as the laser head moves along a predefined path. In order to protect the material from oxidation during deposition, argon is used as a shielding gas-fed continuously to the melt pool. 316L austenitic stainless steel was chosen for this experiment because it undergoes no phase transformations during deposition. This reduces the complexity of the metallurgical processes involved. Evaluation of the sections produced by the contour method was carried out using an optical precision measuring machine (3D scanner) and FE software.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EF17_048%2F0007350" target="_blank" >EF17_048/0007350: Předaplikační výzkum funkčně graduovaných materiálů pomocí aditivních technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

PING 2019, Modern trends in material engineering

ISBN

—

ISSN

1757-899X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

nestránkováno

Název nakladatele

IOP Publishing

Místo vydání

Bristol

Místo konání akce

Plzeň

Datum konání akce

10. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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