High-Entropy Alloy Composition for Heat-Resistant Welding
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Solution Overview
Problem
Current High Entropy Alloys do not adequately address the specific requirements for high temperature resistance and mechanical/chemical durability in welding applications, limiting their effectiveness in extreme conditions.
Innovation Solution
Development of novel High Entropy Alloy compositions comprising Nickel, Manganese, Cobalt, Chromium, Vanadium, Molybdenum, and Iron, with optional Aluminum, Titanium, and Boron, optimized for welding through cored wire and electrode manufacturing techniques, providing enhanced solid solution strengthening and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional alloys are used, then manufacturing and welding processes are simpler, but high temperature strength and corrosion resistance are insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters of the alloy by incorporating specific elements (Ni, Mn, Co, Cr, V, Mo, Fe) in optimized weight percentages. This parameter change enables the alloy to achieve superior high temperature strength and corrosion resistance while maintaining weldability through controlled composition ranges
Solution Approach 2:
The patent creates a composite high entropy alloy system combining multiple metallic elements in approximately equal atomic proportions. This composite structure leverages the synergistic effects of different elements to achieve properties that individual elements or conventional alloys cannot provide, particularly at elevated temperatures
2Reliability
If High Entropy Alloys are used, then temperature resistance and corrosion resistance are improved, but specific requirements for welding applications are not adequately met
Solution Approach 1:
The patent applies local quality by optimizing specific elemental compositions and their distributions within the alloy system. By controlling the weight percentages of individual elements (e.g., Cr for corrosion resistance, Ni for ductility), the alloy achieves localized property enhancement that addresses both corrosion resistance and welding suitability simultaneously
Solution Approach 2:
The patent designs a multi-functional alloy composition that simultaneously provides high temperature strength, corrosion resistance, oxidation resistance, and weldability. The balanced composition of multiple elements enables the material to perform multiple functions that conventional single-purpose alloys cannot achieve
3Strength
If High Entropy Alloys are used, then strength-to-weight ratio is improved, but ductility at elevated temperatures is reduced
Solution Approach 1:
The patent optimizes the compositional parameters by incorporating specific elements in controlled proportions. Nickel (8-15 wt.%) and Manganese (10-20 wt.%) are included to stabilize the austenitic structure and maintain ductility at elevated temperatures, while other elements contribute to strength, achieving a balanced strength-to-weight ratio with preserved ductility
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 alloy compositions offer improved high temperature strength, corrosion resistance, and ductility, making them suitable for demanding welding applications, such as engine components and gas/oil applications, by integrating the elements in specific weight percentages and manufacturing processes.
Implementation Method 1
optimized for welding through cored wire and electrode manufacturing techniques, providing enhanced solid solution strengthening and corrosion resistance
Implementation Method 2
HEAs have highly desirable engineering properties. Some HEAs have considerably better strength-to-weight ratios, with a higher degree of favorable fracture toughness and tensile strength combination, very high temperature resistance, as well as corrosion and oxidation resistance than conventional alloys
Data Source
AI summary
Novel High-Entropy Alloy (HEA) compositions are particularly suited to welding applications. The mixtures contain at least the elements nickel, manganese, cobalt, chromium, vanadium, molybdenum, and iron. The % weight of the constituents varies in accordance with the detailed description contained herein, with tolerances in the range of ±4% for major alloying elements and ±1% for minor alloying elements. The mixture may also contain a small amount of Aluminum, Titanium, and Boron with a tolerance in the range of +/−1% or, more preferably, +/−0.5% In accordance with the invention, the compositions above may be integrated into HEA welding products using cored wire and welding electrode manufacturing techniques, preferably starting with vacuum melted rolled alloys. One manufacturing process uses the compositions as an alloyed strip formed around the appropriate ground/crushed alloys to make commercially viable fabricated welding products.