Overview
ISO/ASTM TR 52905:2023 - "Additive manufacturing of metals - Non‑destructive testing and evaluation - Defect detection in parts" is a technical report that categorizes defects found in metal additive manufacturing (AM) processes (primarily DED and PBF using laser and electron beam), reviews relevant NDT standards, and details non‑destructive testing (NDT) methods suited to complex 3D geometries produced by AM. The document targets producers and users of metal AM-especially for safety‑critical applications, reverse‑engineered parts and test bodies verifying geometry and integrity.
Key technical topics and requirements
- Defect classification and causes: systematic categorization of AM flaws (e.g., lack of fusion, porosity) and their origins; definitions align with ISO/ASTM 52900, ASTM E1316 and EN 1330‑2 terminology.
- NDT standards review: evaluation of existing post‑process and in‑process standards from welding/casting and their applicability to AM; identification of gaps where AM‑specific standards are needed.
- NDT method capabilities for AM: discussion and validation trials of methods including:
- X‑ray computed tomography (XCT) - preferred for complex internal geometries but limited by cost and throughput.
- Neutron imaging and synchrotron techniques
- Thermography testing
- Ultrasonic testing (UT and phased array PAUT)
- Resonant ultrasound spectroscopy (RUS) and residual stress characterization
- Two‑level artefact approach: use of a star artefact as an Initial Quality Indicator (IQI) and an à la carte artefact for part‑specific validation and standard selection.
- Trials and validation: documented experimental trials, apparatus setups and interpretation guidance (XCT, NI, TT, RUS, UT, residual stress methods).
- Normative references and terminology guidance to support consistent implementation.
Practical applications and users
This report is practical for:
- AM manufacturers and process engineers implementing inspection strategies for DED and PBF metal parts.
- NDT specialists and quality managers defining acceptance criteria and selecting appropriate inspection methods.
- Test houses and certification bodies conducting validation, comparative trials and producing part‑specific inspection plans.
- Highly regulated sectors (aerospace, medical devices, automotive, energy) that require confidence in AM parts for safety‑critical use.
- Reverse engineering workflows where verification of as‑built vs requested geometries is needed.
Related standards and keywords
- Related normative documents: ISO/ASTM 52900, ASTM E1316, EN 1330‑2, ISO 11484.
- SEO keywords: ISO/ASTM TR 52905:2023, additive manufacturing, metal AM, non‑destructive testing, NDT for AM, defect detection, PBF, DED, XCT, ultrasonic testing, star artefact, à la carte artefact.
This technical report provides a structured framework to assess NDT readiness for metal AM defects and to guide selection and validation of inspection methods for complex AM geometries.