Triangular Recess Test Specimen for Laser Melting Validation
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Solution Overview
Problem
The existing methods for validating operating parameters in additive manufacturing by laser melting on powder beds are time-consuming and costly due to the need for extensive testing of multiple parameters, particularly in the aeronautical industry, where complex shapes and surface conditions require lengthy iterations to ensure material health and manufacturability.
Innovation Solution
A novel test specimen geometry with specific features such as triangular recesses and inclined faces is used for additive manufacturing, allowing for the evaluation of multiple sets of operating parameters in a single production run, enabling quick assessment of material health and manufacturability, including critical areas like downskin and upskin faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple test specimens of different geometries are manufactured to evaluate operating parameters, then comprehensive validation of material health and surface conditions is achieved, but the time required for manufacture and metallographic analysis increases significantly
Solution Approach 1:
The test specimen is divided into multiple functional zones (massive portion, thin portion, recesses) that can be evaluated separately. The recesses are specifically designed to expose different surface conditions (downskin, upskin, thin walls) for targeted analysis, allowing comprehensive validation without manufacturing entire complex parts.
Solution Approach 2:
The invention extracts critical evaluation areas from complex part geometries and concentrates them into a dedicated test specimen with specific recesses. These recesses expose critical surfaces (downskin, upskin, thin walls) that can be analyzed without manufacturing the complete part, thereby reducing time while maintaining validation reliability.
2Reliability
If extensive testing of multiple operating parameters is performed to ensure material health, then reliable manufacturing parameters are obtained, but the industrial process becomes lengthy and costly
Solution Approach 1:
The test specimen serves multiple functions simultaneously: it validates material health, assesses surface conditions (downskin, upskin), evaluates thin wall manufacturing, and determines mass yield. By combining these evaluation functions into a single specimen geometry, the invention enables comprehensive parameter validation without requiring separate tests for each function, thereby increasing productivity.
3Manufacturing precision
If complete iterations of parameter optimization are performed for different geometries, then satisfactory surface conditions are achieved, but the process becomes repetitive and time-consuming
Solution Approach 1:
The test specimen is designed with pre-formed recesses that expose critical surfaces (downskin, upskin, thin walls) before the actual manufacturing process. This preliminary geometric preparation allows immediate assessment of surface conditions and material health without requiring complete iterative optimization cycles for each geometry, thereby reducing iteration time while maintaining manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the time and material required for parameter validation, accelerating the industrial process by allowing multiple parameter evaluations in a single test specimen, thereby enhancing the reactivity of the additive manufacturing method.
Implementation Method 1
additive manufacturing by laser melting on powder beds
Implementation Method 2
laser melting on powder beds
Data Source
AI summary
A test specimen for validating operating parameters of a method for the additive manufacturing of a part by laser melting on powder beds includes at least one upper face, at least one lower face and side faces, including a front side face and a rear side face that are substantially on opposite sides from one another. The test specimen has at least one recess opening onto the front and rear side faces, the recess having a substantially triangular cross sectional shape being delimited by three internal faces, including a first lower internal face oriented upwards, a second upper internal face oriented downwards, and a third upper internal face which defines a narrow wall with one other of the side faces, which is inclined.