Titanium-Steel Interface Layer for Suppressing Ti-Fe Diffusion
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Solution Overview
Problem
Traditional laser additive manufacturing methods fail to achieve strong metallurgical bonding between titanium alloy and stainless steel due to the formation of brittle intermetallic compounds, leading to interface cracking and reduced bonding strength, limiting their industrial application.
Innovation Solution
Incorporating an intermediate layer of elemental metal Ce and Cr layers between titanium alloy and stainless steel layers, formed through laser sintering, to block the diffusion of Ti and Fe elements, thereby enhancing metallurgical bonding and formability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If titanium alloy and stainless steel are directly connected through laser additive manufacturing, then the manufacturing process is simple, but brittle intermetallic compounds form causing interface cracking and reduced bonding strength
Solution Approach 1:
An intermediate layer composed of specific alloying elements (such as Al, Cr, Ni) is introduced between the titanium alloy and stainless steel layers. This intermediate layer acts as a diffusion barrier that prevents the formation of brittle Ti-Fe intermetallic compounds while promoting metallurgical bonding, thereby resolving the contradiction between manufacturing simplicity and interface bonding strength
Solution Approach 2:
The chemical composition parameters of the intermediate layer are specifically controlled to contain elements that inhibit intermetallic formation. By adjusting the concentration and type of alloying elements in the intermediate layer, the diffusion behavior at the interface is modified to prevent brittle compound formation while maintaining strong bonding
2Strength
If an intermediate layer is added to prevent element diffusion, then interface bonding strength is improved, but device complexity increases
Solution Approach 1:
The intermediate layer is segmented into a thin functional barrier zone with specific composition, separating the titanium alloy and stainless steel layers. This segmentation allows the intermediate layer to perform its diffusion-blocking function while minimizing the overall structural complexity by confining the compositional variation to a specific zone
3Productivity
If traditional laser additive manufacturing is used, then manufacturing efficiency is high, but complex multi-material components with specific physical performances cannot be manufactured
Solution Approach 1:
The laser additive manufacturing process is enhanced with multi-material capability, allowing the same equipment to deposit different alloy compositions (titanium alloy, intermediate layer, stainless steel) in sequence. This multi-functionality enables the production of complex multi-material components with specific physical performances while maintaining high manufacturing efficiency
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
The intermediate layer effectively prevents brittle intermetallic compound formation, resulting in improved interface bonding and mechanical performance, allowing for the simultaneous advantages of titanium alloy and stainless steel, suitable for severe working conditions.
Implementation Method 1
the titanium alloy layer, the intermediate layer and the stainless steel layer are sequentially deposited from bottom to top through a laser directed energy deposition process
Implementation Method 2
the titanium alloy layer is formed by laser sintering to melt titanium alloy powder
Implementation Method 3
the intermediate layer capable of blocking Ti and Fe elements from diffusing
Data Source
AI summary
The present disclosure discloses a laser additive manufacturing titanium-steel multi-material component having an improved interface bonding and formability by suppressing an element diffusion through an intermediate layer, as well as an apparatus and a method thereof. The laser additive manufacturing titanium-steel multi-material component comprises a titanium alloy layer, an intermediate layer and a stainless steel layer, the intermediate layer includes an elemental metal Ce layer and an elemental metal Cr layer, and the titanium alloy layer, the elemental metal Ce layer, the elemental metal Cr layer and the stainless steel layer are sequentially deposited through a laser directed energy deposition process.