Nanostructural hierarchy increases the strength of aluminium alloys
作者： Peter V. Liddicoat , Xiao-Zhou Liao , Yonghao Zhao , Yuntian Zhu , Maxim Y. Murashkin
DOI: 10.1038/NCOMMS1062
关键词:
摘要: Increasing the strength of metallic alloys while maintaining formability is an interesting challenge for enabling new generations lightweight structures and technologies. In this paper, we engineer aluminium to contain a hierarchy nanostructures possess mechanical properties that expand known performance boundaries-an aerospace-grade 7075 alloy exhibits yield uniform elongation approaching 1 GPa 5%, respectively. The nanostructural architecture was observed using novel high-resolution microscopy techniques comprises solid solution, free precipitation, featuring (i) high density dislocations, (ii) subnanometre intragranular solute clusters, (iii) two geometries nanometre-scale intergranular (iv) grain sizes tens nanometres in diameter. Our results demonstrate offers design pathway towards generation super-strong materials with regimes property-performance space.
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S.P. Ringer, K. Hono, Microstructural Evolution and Age Hardening in Aluminium Alloys: Atom Probe Field-Ion Microscopy and Transmission Electron Microscopy Studies Materials Characterization. ,vol. 44, pp. 101- 131 ,(2000) , 10.1016/S1044-5803(99)00051-0
Michael K Miller, Atom Probe Tomography: Analysis at the Atomic Level ,(2011)
Ruslan Z. Valiev, Terence G. Langdon, Principles of equal-channel angular pressing as a processing tool for grain refinement Progress in Materials Science. ,vol. 51, pp. 881- 981 ,(2006) , 10.1016/J.PMATSCI.2006.02.003
Y. T. Zhu, X. Z. Liao, S. G. Srinivasan, E. J. Lavernia, Nucleation of deformation twins in nanocrystalline face-centered-cubic metals processed by severe plastic deformation Journal of Applied Physics. ,vol. 98, pp. 034319- ,(2005) , 10.1063/1.2006974
A DETOR, C SCHUH, Grain boundary segregation, chemical ordering and stability of nanocrystalline alloys: Atomistic computer simulations in the Ni–W system Acta Materialia. ,vol. 55, pp. 4221- 4232 ,(2007) , 10.1016/J.ACTAMAT.2007.03.024
A.H. Chokshi, A. Rosen, J. Karch, H. Gleiter, On the validity of the hall-petch relationship in nanocrystalline materials Scripta Metallurgica. ,vol. 23, pp. 1679- 1683 ,(1989) , 10.1016/0036-9748(89)90342-6
Zvi Katz, Nils Ryum, Precipitation kinetics in Al-alloys Scripta Metallurgica. ,vol. 15, pp. 265- 268 ,(1981) , 10.1016/0036-9748(81)90341-0
H. Van Swygenhoven, P. M. Derlet, A. G. Frøseth, Stacking fault energies and slip in nanocrystalline metals Nature Materials. ,vol. 3, pp. 399- 403 ,(2004) , 10.1038/NMAT1136
Jakob Schiøtz, Karsten W Jacobsen, A Maximum in the Strength of Nanocrystalline Copper Science. ,vol. 301, pp. 1357- 1359 ,(2003) , 10.1126/SCIENCE.1086636
Vladimir V Stolyarov, Y Theodore Zhu, Igor V Alexandrov, Terry C Lowe, Ruslan Z Valiev, None, Influence of ECAP routes on the microstructure and properties of pure Ti Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 299, pp. 59- 67 ,(2001) , 10.1016/S0921-5093(00)01411-8