oSIST prEN ISO/ASTM 52941:2023

SLOVENSKI STANDARD
01-november-2023
[Not translated]
Additive manufacturing - System performance and reliability - Acceptance tests for laser
metal powder-bed fusion machines for metallic materials for aerospace application
(ISO/ASTM DIS 52941:2023)
Additive Fertigung - Systemleistung und Betriebssicherheit - Abnahmeprüfung von
pulverbettbasierten Laserstrahlanlagen für metallische Werkstoffe in Luft- und
Raumfahrtanwendungen (ISO/ASTM DIS 52941:2023)
Fabrication additive - Performance et fiabilité du système - Essais de réception pour
machines de fusion laser sur lit de poudre pour les matériaux métalliques pour
l’application aérospatiale (ISO/ASTM DIS 52941:2023)
Ta slovenski standard je istoveten z: prEN ISO/ASTM 52941
ICS:
25.030 3D-tiskanje Additive manufacturing
49.025.01 Materiali za letalsko in Materials for aerospace
vesoljsko gradnjo na splošno construction in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/ASTM DIS 52941
ISO/TC 261 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-09-28 2023-12-21
Additive manufacturing — System performance and
reliability — Acceptance tests for laser metal powder-
bed fusion machines for metallic materials for aerospace
application
Fabrication additive — Performance et fiabilité du système — Essais de réception pour machines de fusion
laser sur lit de poudre pour les matériaux métalliques pour l’application aérospatiale
ICS: 25.030
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
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Reference number
NATIONAL REGULATIONS.
ISO/ASTM DIS 52941:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO/ASTM International 2023

ISO/ASTM DIS 52941:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/ASTM DIS 52941
ISO/TC 261 Secretariat: DIN
Voting begins on: Voting terminates on:

Additive manufacturing — System performance and
reliability — Acceptance tests for laser metal powder-
bed fusion machines for metallic materials for aerospace
application
Fabrication additive — Performance et fiabilité du système — Essais de réception pour machines de fusion
laser sur lit de poudre pour les matériaux métalliques pour l’application aérospatiale
ICS: 25.030
This document is circulated as received from the committee secretariat.
© ISO/ASTM International 2023 THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
NOT BE REFERRED TO AS AN INTERNATIONAL
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below STANDARD UNTIL PUBLISHED AS SUCH.
or ISO’s member body in the country of the requester. In the United States, such requests should be sent to ASTM International.
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POTENTIAL TO BECOME STANDARDS TO
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WHICH REFERENCE MAY BE MADE IN
Reference number
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NATIONAL REGULATIONS.
Website: www.iso.org Website: www.astm.org ISO/ASTM DIS 52941:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
© ISO/ASTM International 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO/ASTM International 2023

ISO/ASTM DIS 52941:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Equipment . 2
5 Environmental and operational conditions . 2
6 Qualification testing . 2
6.1 General . 2
6.2 Laser beam tests . 2
6.2.1 Testing the laser power for continuous wave lasers . 2
6.2.2 Testing the laser power stability for continuous wave lasers . 3
6.2.3 Testing of pulsed wave lasers . 3
6.2.4 Evaluation of the laser beam characteristics. 3
6.2.5 Evaluation of the minimum laser beam waist position in different working
plane locations . 3
6.2.6 Evaluation of the thermal stability of the minimum beam waist position . 3
6.2.7 Testing the laser beam position . 4
6.2.8 Trajectory accuracy . 4
6.2.9 Scanning speed . 4
6.2.10 Requirements for equipment with multiple laser beam sources . 4
6.3 Mechanical function test . 5
6.3.1 General . 5
6.3.2 Build platform positioning . 5
6.3.3 Feeding platform positioning. 5
6.3.4 Other powder feed processing mechanics . 5
6.3.5 Movement of the powder spreading device . 5
6.4 Heating system . 6
6.5 Atmosphere inside the working space . 6
6.6 Data recording . 6
6.7 Safety systems . 6
6.8 Optional tests . 6
6.8.1 Demonstrators and test artifacts . 6
6.8.2 Build area assessment . 6
6.8.3 Gas flow test by hot wire anemometer . 7
6.9 Requalification . 8
7 Test report . 8
Annex A (informative) Example of a test report .10
Annex B (informative) Geometric pattern for the trajectory accuracy test .11
Bibliography .12
iii
© ISO/ASTM International 2023 – All rights reserved

ISO/ASTM DIS 52941:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by ISO/TC 261, Additive manufacturing, in cooperation with ASTM F 42,
Additive Manufacturing Technologies, on the basis of a partnership agreement between ISO and ASTM
International with the aim to create a common set of ISO/ASTM standards on additive manufacturing.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
© ISO/ASTM International 2023 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/ASTM DIS 52941:2023(E)
Additive manufacturing — System performance and
reliability — Acceptance tests for laser metal powder-
bed fusion machines for metallic materials for aerospace
application
1 Scope
This document specifies requirements and test methods for the qualification and re-qualification of
laser beam machines for metal powder bed fusion additive manufacturing for aerospace applications.
It can also be used to verify machine features during periodic inspections or following maintenance
and repair activities.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11146 (all parts), Lasers and laser-related equipment — Test methods for laser beam widths, divergence
angles and beam propagation ratios
ISO 11554, Optics and photonics — Lasers and laser-related equipment — Test methods for laser beam
power, energy and temporal characteristics
ISO/ASTM 52900, Additive manufacturing — General principles — Fundamentals and vocabulary
ISO/ASTM 52921, Standard terminology for additive manufacturing — Coordinate systems and test
methodologies
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/ASTM 52900, ISO/ASTM 52921
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
scanning speed
relative linear speed of the laser beam movement in the plane of the build platform (working plane)
3.2
warm-up time
time from switching on the machine until the build cycle can be started, as specified by the machine
manufacturer
3.3
feeding platform
platform that moves incrementally to supply powder to the powder spreading device (3.4)
© ISO/ASTM International 2023 – All rights reserved

ISO/ASTM DIS 52941:2023(E)
3.4
powder spreading device
powder supply mechanism, which distributes and evenly spreads the powder on the build surface
3.5
rated laser power
the maximum power capability as specified by the laser manufacturer
3.6
minimum beam waist position
focal spot location at which the beam has the most concentrated energy and the smallest cross sectional
area
4 Equipment
Equipment shall be installed, operated and maintained according to the documented instructions.
5 Environmental and operational conditions
The environmental and operational conditions during qualification testing shall meet the requirement
ranges if specified by the machine manufacturer and shall conform to the conditions which are specified
...