Residual stress investigation in additively manufactured samples

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Residual stress investigation in additively manufactured samples

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/EF17_048%2F0007350" target="_blank" >EF17_048/0007350: Pre-Application Research of Functionally Graduated Materials by Additive Technologies</a><br>

Continuities

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

Publication year

2020

Confidentiality

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

Article name in the collection

PING 2019, Modern trends in material engineering

ISBN

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ISSN

1757-899X

e-ISSN

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Number of pages

6

Pages from-to

nestránkováno

Publisher name

IOP Publishing

Place of publication

Bristol

Event location

Plzeň

Event date

Sep 10, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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