Development of Ductile Refractory Alloys With Excellent High-Temperature Strength for Extreme Environments

Area of Science:

• Materials Science
• Metallurgy
• Aerospace Engineering

Background:

• Growing aerospace demand for high-temperature alloys.
• Need for alloys with strength and formability for hot-end components.
• Refractory alloys, including medium- and high-entropy alloys, are key candidates for extreme environments.

Purpose of the Study:

• Comprehensively review mechanical properties of ductile refractory alloys across temperatures.
• Assess fabrication methods and key mechanical behaviors.
• Summarize strategies for strength-ductility synergy and discuss oxidation challenges.

Main Methods:

• Literature review of ductile refractory alloys.
• Analysis of fabrication techniques for bulk refractory alloys.
• Discussion of mechanical properties including ductile-to-brittle transition, room-temperature strength-ductility, and high-temperature performance.

Main Results:

• Refractory alloys show promise for extreme environments.
• Ductile-to-brittle transition and strength-ductility trade-offs are critical considerations.
• Toughening and strengthening strategies can enhance performance.
• Oxidation remains a significant limitation.

Conclusions:

• Ductile refractory alloys are crucial for advanced aerospace applications.
• Further research is needed to overcome challenges like oxidation and optimize properties.
• This field holds significant potential for future high-temperature material development.