ISO/ASTM 52941:2020
Additive manufacturing — System performance and reliability — Acceptance tests for laser metal powder-bed fusion machines for metallic materials for aerospace application
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.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Equipment
5 Environmental and operational conditions
6 Qualification testing
6.1 General
6.2 Laser beam tests
6.2.1 Testing the laser power for continuous wave lasers
6.2.2 Testing the laser power stability for continuous wave lasers
6.2.3 Testing of pulsed wave lasers
6.2.4 Evaluation of the laser beam characteristics
6.2.5 Evaluation of the minimum laser beam waist position in different working plane locations
6.2.6 Evaluation of the thermal stability of the minimum beam waist position
6.2.7 Testing the laser beam position
6.2.8 Trajectory accuracy
6.2.9 Scanning speed
6.2.10 Requirements for equipment with multiple laser beam sources
6.3 Mechanical function test
6.3.1 General
6.3.2 Build platform positioning
6.3.3 Feeding platform positioning
6.3.4 Other powder feed processing mechanics
6.3.5 Movement of the powder spreading device
6.4 Heating system
6.5 Atmosphere inside the working space
6.6 Data recording
6.7 Safety systems
6.8 Optional tests
6.8.1 Demonstrators and test artifacts
6.8.2 Build area assessment
6.8.3 Gas flow test by hot wire anemometer
6.9 Requalification
7 Test report
Annex A (informative) Example of a test report
Annex B (informative) Geometric pattern for the trajectory accuracy test
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Equipment
5 Environmental and operational conditions
6 Qualification testing
6.1 General
6.2 Laser beam tests
6.2.1 Testing the laser power for continuous wave lasers
6.2.2 Testing the laser power stability for continuous wave lasers
6.2.3 Testing of pulsed wave lasers
6.2.4 Evaluation of the laser beam characteristics
6.2.5 Evaluation of the minimum laser beam waist position in different working plane locations
6.2.6 Evaluation of the thermal stability of the minimum beam waist position
6.2.7 Testing the laser beam position
6.2.8 Trajectory accuracy
6.2.9 Scanning speed
6.2.10 Requirements for equipment with multiple laser beam sources
6.3 Mechanical function test
6.3.1 General
6.3.2 Build platform positioning
6.3.3 Feeding platform positioning
6.3.4 Other powder feed processing mechanics
6.3.5 Movement of the powder spreading device
6.4 Heating system
6.5 Atmosphere inside the working space
6.6 Data recording
6.7 Safety systems
6.8 Optional tests
6.8.1 Demonstrators and test artifacts
6.8.2 Build area assessment
6.8.3 Gas flow test by hot wire anemometer
6.9 Requalification
7 Test report
Annex A (informative) Example of a test report
Annex B (informative) Geometric pattern for the trajectory accuracy test
Bibliography