Hybrid Load-Bearing Element Joining Titanium and Aluminum
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Solution Overview
Problem
The high cost and difficulty of joining titanium components with other materials for structural components in transportation devices, such as aircraft, due to the limitations of adhesive bonding, fusion welding, and brazing, lead to expensive production methods and reduced flexibility in design.
Innovation Solution
A method involving a friction-based application or welding method to apply a layer of a second material, such as aluminum, onto a titanium base chord, allowing for a high-strength connection and enabling the use of conventional joining methods for additional components, thereby reducing production costs and enhancing design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If titanium components are joined with other materials using traditional methods (adhesive bonding, fusion welding, or brazing), then connection strength is achieved, but production cost increases and manufacturing complexity increases
Solution Approach 1:
The invention changes the fundamental parameter of the joining process by using friction stir welding instead of traditional adhesive bonding, fusion welding, or brazing. This parameter change enables direct material bonding between titanium and other materials through mechanical mixing and diffusion, achieving strong connections while eliminating the need for expensive adhesives or complex welding procedures
Solution Approach 2:
The invention replaces the chemical bonding mechanism of adhesives with a mechanical bonding mechanism through friction stir welding. The rotating tool creates mechanical mixing and diffusion bonding between materials, substituting chemical adhesive bonds with mechanical interlocking and metallurgical bonding, thereby eliminating adhesive cost and complexity
2Strength
If titanium components are joined with other materials using traditional methods, then connection is achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The invention changes the joining process parameter from multi-step traditional methods to a single-step friction stir welding process. This parameter simplification reduces manufacturing complexity by consolidating multiple operations (surface preparation, adhesive application, curing, or complex welding procedures) into one integrated friction-based joining operation
Solution Approach 2:
The invention replaces complex chemical bonding systems (adhesive application, positioning, curing cycles) or complex thermal welding systems with a simpler mechanical friction-based system. The rotating tool directly creates the bond through mechanical action, eliminating the need for complex auxiliary systems and procedures
3Strength
If sections of seat rails are produced completely from titanium to achieve high strength and corrosion resistance, then material properties are improved, but production cost increases significantly
Solution Approach 1:
The invention uses composite construction by joining titanium sections with other materials (such as aluminum or stainless steel) through friction stir welding. This creates a hybrid structure that maintains the high strength and corrosion resistance of titanium where needed while using more cost-effective materials in non-critical sections, thereby reducing overall production cost while preserving essential material properties
Solution Approach 2:
The invention applies local quality by using titanium only in specific sections where high strength and corrosion resistance are critically needed, while using other materials in sections where these properties are less demanding. The friction stir welding technique enables this localized material distribution by creating strong bonds between dissimilar materials, optimizing both cost and performance
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 enables cost-effective production of supporting elements with high strength and desired properties by creating a strong interface between titanium and other materials, allowing for complex shapes and weight-optimized configurations, while avoiding the limitations of traditional joining techniques.
Implementation Method 1
applying at least one layer of at least one second material to the first surface using a friction-based application or welding method
Implementation Method 2
applying at least one layer of at least one second material to the first surface using a friction-based application or welding method
Data Source
AI summary
A method for producing a supporting element for a transportation device or vehicle, having steps of providing a flat base chord made of a first material having a first surface and a second surface, applying at least one layer of at least one second material to the first surface using a friction-based application or welding method, and machining the at least one layer of the second material to produce a desired profile cross section of the supporting element, wherein the first material and the second material are different metallic materials.