Induction Heating for Crack-Resistant DED Repair of Components
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Solution Overview
Problem
High temperature capable metallic alloys used in aerospace components often crack during directed energy deposition (DED) repair processes due to uncontrolled processing temperatures and environmental conditions.
Innovation Solution
A method and system that utilize induction heating to control the temperature of aerospace components during DED repair, where a magnetic field is applied via an induction coil to preheat the component to a desired temperature before repair, thereby reducing the risk of cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directed energy deposition repair is performed on high temperature capable metallic alloys without temperature control, then the repair process can be completed, but cracking occurs in the component due to uncontrolled processing temperatures
Solution Approach 1:
The system performs preliminary heating of the component to a controlled temperature range (600-900°C) before initiating the directed energy deposition repair process. This pre-heating action prevents thermal shock and reduces the temperature differential between the deposition zone and surrounding areas, thereby preventing cracking during repair
Solution Approach 2:
The system dynamically controls and adjusts the temperature parameter throughout the repair process by regulating power delivery to the induction heating coil. The temperature is maintained within a specific range (600-900°C) to prevent cracking while enabling successful material deposition and bonding
2Reliability
If induction heating is applied to control component temperature during DED repair, then cracking is reduced, but the process complexity increases due to additional heating system components
Solution Approach 1:
The system integrates multiple functions into a single unified platform: the induction heating coil serves both as a heating element and a temperature control mechanism, while the controller simultaneously manages both the heating process and the directed energy deposition parameters. This multi-functionality reduces the need for separate independent systems
Solution Approach 2:
The system employs temperature sensors to continuously monitor the component temperature during repair and feeds this information back to the controller. The controller automatically adjusts the heating power to maintain the temperature within the optimal range (600-900°C), enabling automatic control without requiring complex manual intervention
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 induction heating method effectively reduces the occurrence of cracking in high temperature capable metallic alloys during DED repair by precisely controlling the processing temperature, ensuring a more reliable and damage-reduced repair process.
Implementation Method 1
A magnetic field is applied to the component via an induction coil thereby causing a temperature of the component to increase
Implementation Method 2
A magnetic field is applied to the component via an induction coil thereby causing a temperature of the component to increase
Data Source
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AI summary
A method for repairing a component (302) without further damaging the component (302) is provided. A magnetic field is applied to the component (302) via an induction coil (304) thereby causing a temperature of the component (302) to increase. Responsive to the component (302) reaching a desired temperature, the component (302) is repaired via a direct energy deposition process.