MMC Coiled Strip Rolling Above Recrystallization Temperature
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Solution Overview
Problem
Metal matrix composites (MMC) exhibit limited ductility, leading to cracking during processing and restricting the production of thin gauge coiled strips, which hinders high-volume, cost-effective processing using automated equipment.
Innovation Solution
The method involves hot working and warm rolling of MMC materials above and around the recrystallization temperature to increase ductility, followed by optional cold working, allowing the production of a coiled strip with enhanced properties and reduced cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MMC materials are processed using conventional batch processes, then the material maintains its high strength and stiffness, but the limited ductility prevents production of coiled strip forms
Solution Approach 1:
The patent applies parameter changes by processing the MMC material at elevated temperatures (above recrystallization temperature) during rolling operations. This temperature parameter change increases the ductility of the aluminum matrix, allowing the material to be formed into coiled strip without cracking, while maintaining the reinforcing ceramic particles' beneficial effects on strength and stiffness.
2Strength
If the material is strengthened to achieve high strength and stiffness, then the material becomes more prone to cracking during processing
Solution Approach 1:
The patent utilizes parameter changes by controlling the temperature parameter during manufacturing operations. Processing above the recrystallization temperature temporarily reduces the material's strength and increases ductility during forming operations, preventing cracks. After cooling, the material regains its high strength properties, achieving both crack resistance during processing and high strength in the final product.
3Reliability
If batch processes are used to maintain material integrity, then production volume is limited and costs increase
Solution Approach 1:
The patent implements continuity of useful action by transitioning from batch processing to a continuous rolling process. The MMC material can be continuously rolled and coiled while maintaining integrity through temperature control, enabling high-volume production with automated equipment while preserving material reliability and preventing defects associated with batch operations.
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 process enables the production of coiled MMC strips with improved ductility and reduced strength, preventing cracks and enabling high-volume, cost-effective production and storage, suitable for various applications.
Implementation Method 1
hot working and warm rolling of MMC materials above and around the recrystallization temperature to increase ductility
Implementation Method 2
warm rolling at a temperature greater than room temperature and less than the recrystallization temperature of the MMC material
Data Source
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AI summary
Methods for producing a coiled strip of metal matrix composite (MMC) material are disclosed. The methods include a combination of hot rolling and warm rolling processes that reduce the thickness of the input material and increase its ductility. The resulting MMC strip can be coiled, which is useful for high volume coil-to-coil applications.