Tungsten Concentration Impacts Ni-W Alloy Strength and Order
Analysis
This paper investigates how the amount of tungsten in nickel-tungsten alloys affects their structure and mechanical properties. The research is important because it explores a new class of materials that could be stronger and denser than existing options. The study uses advanced techniques to understand the relationship between the alloy's composition, its internal structure (short-range order), and how it behaves under stress. The findings could lead to the development of new high-performance alloys.
Key Takeaways
- •Ni-W alloys are promising for bridging the density-strength gap.
- •Tungsten concentration significantly impacts short-range order (SRO).
- •SRO enhances strain hardening and promotes planar slip and twin formation.
- •High grain boundary strengthening coefficient observed in Ni-38W.
- •First-principles simulations link W content to SRO stabilization.
Reference
“Strong short-range order emerges when W content exceeds about 30 wt%, producing distinct diffuse scattering and significantly enhancing strain-hardening capacity.”