Heterogeneous Foil Homogenization for Uniform Light Alloy Parts
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Solution Overview
Problem
Laminated object manufacturing (LOM) techniques often result in composition gradients within assembled parts, leading to mechanical properties that do not match the predicted average composition of the alloy, necessitating improved methods for achieving uniform alloy compositions.
Innovation Solution
A method involving the stacking of foils with different compositions, followed by heat treatment at specific temperatures to bond and homogenize the foils, ensuring the final object has a desired alloy composition without adding material, using processes like diffusion bonding, transient liquid phase diffusion bonding, or brazing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If LOM techniques stack multiple foils with different compositions and bond them together, then the object can achieve a desired average alloy composition, but composition gradients remain in bonded regions causing mechanical properties to deviate from predictions
Solution Approach 1:
The patent applies heat treatment at controlled temperatures to change the physical state and diffusion characteristics of the foil materials. By heating the stacked foils to specific temperatures, atomic diffusion is enhanced across bonded regions, gradually eliminating composition gradients and achieving uniform alloy composition throughout the object.
Solution Approach 2:
The patent utilizes phase transitions during heat treatment, where materials transition between solid states with different diffusion rates. By controlling temperature parameters, the process promotes solid-state diffusion that homogenizes the alloy composition while maintaining the structural integrity of the laminated object.
2Strength
If heat treatment is applied to bond foils together, then strong metallic bonds are formed without adhesives, but energy consumption increases
Solution Approach 1:
The patent optimizes bonding parameters by controlling heat treatment temperature and duration. By carefully selecting temperature ranges that promote diffusion bonding without excessive energy input, the process achieves strong metallic bonds between foils while minimizing energy consumption. The parameter optimization balances bond strength requirements with energy 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
This approach ensures the mechanical properties of the final object match the target alloy composition, enhancing the consistency and reliability of LOM-produced parts by promoting solid-state diffusion and forming strong metallic bonds without the need for adhesives.
Implementation Method 1
using processes like diffusion bonding, transient liquid phase diffusion bonding, or brazing
Implementation Method 2
using processes like diffusion bonding, transient liquid phase diffusion bonding, or brazing
Implementation Method 3
using processes like diffusion bonding, transient liquid phase diffusion bonding, or brazing
Implementation Method 4
applying heat to the stack at a second temperature to homogenize the composition of the stack
Data Source
AI summary
A method for the manufacturing of an object. The method includes receiving a desired alloy composition for the object, depositing a plurality of foils in a stack to form the object, applying heat to the stack at a first temperature to bond the plurality of foils to each other, and applying heat to the stack at a second temperature to homogenize the composition of the stack. The homogenized stack has the desired alloy composition.