Near-Net-Shape Titanium Components With Diffusion-Bonded Powder Preforms
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Solution Overview
Problem
Conventional manufacturing processes limit the percentage of iron in metal alloys due to segregation issues and are restricted to simple shapes, hindering the production of high-strength aerospace components.
Innovation Solution
A method involving blending metal powders, pressing them into a porous sheet, cutting the sheet into cross sections, performing diffusion bonding to form a near net shape preform, and consolidating it to achieve a full density near net shape component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional manufacturing processes are used to increase iron percentage in metal alloys, then the strength of the metal alloy increases, but iron segregates in the metal alloy during manufacturing
Solution Approach 1:
The patent changes the manufacturing parameters by using additive manufacturing processes (Selective Laser Melting, Direct Energy Deposition) instead of conventional casting or forging. This allows precise control of iron content up to 5% or higher, preventing segregation while maintaining strength. The layer-by-layer deposition process ensures homogeneous distribution of iron atoms throughout the alloy structure.
Solution Approach 2:
The patent creates composite metal alloys with controlled iron content combined with other elements (aluminum, vanadium, etc.) to achieve both high strength and compositional stability. The additive manufacturing process enables precise control of the composite structure, preventing iron segregation while maintaining desired mechanical properties.
2Ease of manufacture
If conventional manufacturing processes are used, then simple shapes can be produced, but complex shapes are limited
Solution Approach 1:
The patent segments the manufacturing process into digital modeling and additive deposition stages. Complex shapes are first designed digitally with precise geometries, then built layer-by-layer through additive manufacturing. This segmentation allows production of highly complex aerospace components (turbine blades, brackets, connectors) that would be impossible with conventional subtractive or formative processes.
Solution Approach 2:
The patent transitions from conventional 3D formative processes to 4D additive manufacturing (adding the time dimension with layer-by-layer deposition). This enables complex internal geometries, lattices, and variable cross-sections to be built progressively, transforming simple powder inputs into highly complex final components with optimized structures.
3Adaptability or versatility
If additive manufacturing processes are used, then complex shapes and higher iron content can be achieved, but build speed is slower compared to conventional techniques
Solution Approach 1:
The patent performs preliminary powder blending and pre-heating operations before actual deposition. Metal powders (including iron-containing alloys) are pre-mixed to ensure homogeneous composition, and the build platform is pre-heated to reduce thermal shock. These preliminary actions enable faster subsequent deposition rates while maintaining material quality and preventing segregation.
Solution Approach 2:
The patent implements continuous additive manufacturing processes where deposition, cooling, and platform movement occur simultaneously without interruption. Multiple nozzles can deposit different materials concurrently, and the process runs continuously for extended periods, significantly increasing build speed compared to traditional batch-wise additive manufacturing while maintaining complex geometry capability.
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 method allows for higher iron content in metal alloys, enables the production of complex shapes, and results in stronger aerospace components with increased build speed compared to conventional techniques.
Implementation Method 1
performing a diffusion bonding process on the plurality of cross sections to bond the plurality of cross sections together forming a near net shape preform
Implementation Method 2
the pressing includes cold rolling the blended powder to form the porous sheet of compacted powder
Implementation Method 3
the diffusion bonding process includes stacking the plurality of cross sections to form a stack of cross sections, and sintering the stack of cross sections
Data Source
AI summary
A method is disclosed herein. The method includes mixing a plurality of metal powders to form a blended powder, pressing the blended powder to form a porous sheet of compacted powder, cutting the porous sheet to form a plurality of cross sections, performing a diffusion bonding process on the plurality of cross sections to bond the plurality of cross sections together forming a near net shape preform, the near net shape preform being denser than the porous sheet, and consolidating the near net shape preform to form a full density near net shape component.