Multicomponent intermetallic nanoparticles and superb mechanical behaviors of complex alloys

By Tao Yang, Y. L. Zhao, Yang Tong, Z. Jiao, Jie Wei, J. Cai, Xiaodong Han, Da Chen, A. Hu, Ji Jung Kai and 3 more. Science, 2018

1,434 citations recorded by the source corpus.

Nanoparticle superalloy Improving the strength of a metal alloy is hard to do without sacrificing the ductility. Yang et al. designed an iron-nickel-cobalt (Fe-Ni-Co) alloy laced with aluminum-titanium (Al-Ti) nanoparticles with both high strength and ductility. The key was getting the composition tuned correctly, because the Fe-Ni-Co matrix reacts with the Al-Ti nanoparticles. This was vital for avoiding environmental embrittlement, enhancing work hardening, and improving ductility. Science, this issue p. 933 Multicomponent nanoparticles enhance both the strength and ductility of an iron-nickel-cobalt alloy. Alloy design based on single–principal-element systems has approached its limit for performance enhancements. A substantial increase in strength up to gigapascal levels typically causes the premature failure of materials with reduced ductility. Here, we report a strategy to break this trade-off by controllably introducing high-density ductile multicomponent intermetallic nanoparticles (MCINPs) in complex alloy systems. Distinct from the intermetallic-induced embrittlement under conventional wisdom, such MCINP-strengthened alloys exhibit superior strengths of 1.5 gigapascals and ductility as high as 50% in tension at ambient temperature. The plastic instability, a major concern for high-strength materials, can be completely eliminated by generating a distinctive multistage work-hardening behavior, resulting from pronounced dislocation activities and deformation-induced microbands. This MCINP strategy offers a paradigm to develop next-generation materials for structural applications.

Subfields: Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/0b2cf2c9e7c11b307297887f854a096ffad5c12f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Mechanical Engineering

1. Shiteng Zhao
2. M. Meyers
3. Zezhou Li
4. R. Ritchie
5. Zhiming Li
6. Jun Wei
7. U. Ramamurty
8. Dierk Raabe

In Mechanics of Materials

1. M. Meyers
2. Jun Wei
3. R. Ritchie
4. U. Ramamurty

Citations in the corpus

• Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy (2019, background): “itation strengthening [2,3], interstitial solid solution strengthening [4–6], twinning- or/and transformationinduced plasticity (TWIP and TRIP, respectively) [7–11],”
• Design of D022 superlattice with superior strengthening effect in high entropy alloys (2019, neutral): “One possible method that further enhances the strength is to improve the volume fraction of g0 phase [30,31].”