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Thicker amorphous grain boundary complexions reduce plastic strain localization in nanocrystalline Cu-Zr
Esther C. Hessong, Nicolo Maria della Ventura, Tongjun Niu +6
Amorphous grain boundary complexions have been shown to increase the plasticity of nanocrystalline alloys as compared to ordered grain boundaries. Here, the effect of an important…
Modulation of structural short-range order due to chemical patterning in multi-component amorphous interfacial complexions
Esther C. Hessong, Zhengyu Zhang, Tianjiao Lei +3
Amorphous interfacial complexions have been shown to restrict grain growth and improve damage tolerance in nanocrystalline alloys, with increased chemical complexity stabilizing th…
The structure and migration of twin boundaries in tetragonal -Sn: an application of machine learning based interatomic potentials
Ian Chesser, Mashroor Nitol, Esther C. Hessong +7
Although atomistic simulations have contributed significantly to our understanding of twin boundary structure and migration in metals and alloys with hexagonal close packed (HCP) c…
Bulk nanocrystalline Al-Mg-Y alloys with amorphous grain boundary complexions display high strength and compressive plasticity
Tianjiao Lei, Esther Hessong, Brandon Fields +3
Although nanocrystalline alloys regularly exhibit high strengths, their use in structural applications often face challenges due to sample size limitations, unstable microstructure…
Binary nanocrystalline alloys with strong glass forming interfacial regions: Complexion stability, segregation competition, and diffusion pathways
Tianjiao Lei, Esther C. Hessong, Daniel S. Gianola +1
Stabilization of grain structure is important for nanocrystalline alloys, and grain boundary segregation is a common approach to restrict coarsening. Doping can alter grain boundar…
Intermetallic particle heterogeneity controls shear localization in high-strength nanostructured Al alloys
Tianjiao Lei, Esther C. Hessong, Jungho Shin +2
The mechanical behavior of two nanocrystalline Al alloys, Al-Mg-Y and Al-Fe-Y, is investigated with in-situ micropillar compression testing. Both alloys were strengthened by a hier…