Group precipitation and age hardening of nanostructured Fe-based alloys with ultra-high strengths.

ABSTRACT: The precipitation of nanoparticles plays a key role in determining the properties of many structural materials, and the understanding of their formation and stabilization mechanisms has been a long standing interest in the material field. However, the critical issues involving the group precipitation of various nanoparticles and their cooperative hardening mechanism remain elusive in the newly discovered Fe-based alloys with nanostructures. Here we quantitatively elucidate the nucleation mechanism, evolution kinetics and hardening effects of the group-precipitated nanoparticles in the Fe-Cu-Ni-Al-based alloys by atom probe tomography together with both first-principles and thermodynamic calculations. Our results provide the compelling evidence for two interesting but complex group precipit

SUBMITTER: Jiao ZB 

PROVIDER: S-EPMC4759528 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature