Nanoscale gold pillars strengthened through dislocation starvation
作者： Julia R. Greer , William D. Nix
DOI: 10.1103/PHYSREVB.73.245410
关键词:
摘要: It has been known for more than half a century that crystals can be made stronger by introducing defects into them, ie, by strain-hardening. As the number of defects increases, their movement and multiplication is impeded, thus strengthening the material. In the present work we show hardening by dislocation starvation, a fundamentally different strengthening mechanism based on the elimination of defects from the crystal. We demonstrate that submicrometer sized gold crystals can be 50 times stronger than their bulk counterparts due …
harvard.edu
sci-hub.se 参考文章(21)
H. D. Espinosa, B. C. Prorok, Size effects on the mechanical behavior of gold thin films Journal of Materials Science. ,vol. 38, pp. 4125- 4128 ,(2003) , 10.1023/A:1026321404286
E. Arzt, G. Dehm, P. Gumbsch, O. Kraft, D. Weiss, Interface controlled plasticity in metals: dispersion hardening and thin film deformation Progress in Materials Science. ,vol. 46, pp. 283- 307 ,(2001) , 10.1016/S0079-6425(00)00015-3
J.S. Stölken, A.G. Evans, A microbend test method for measuring the plasticity length scale Acta Materialia. ,vol. 46, pp. 5109- 5115 ,(1998) , 10.1016/S1359-6454(98)00153-0
M.F. Horstemeyer, M.I. Baskes, S.J. Plimpton, LENGTH SCALE AND TIME SCALE EFFECTS ON THE PLASTIC FLOW OF FCC METALS Acta Materialia. ,vol. 49, pp. 4363- 4374 ,(2001) , 10.1016/S1359-6454(01)00149-5
Shigenobu Ogata, Ju Li, Naoto Hirosaki, Yoji Shibutani, Sidney Yip, Ideal shear strain of metals and ceramics Physical Review B. ,vol. 70, pp. 104104- ,(2004) , 10.1103/PHYSREVB.70.104104
Julia R. Greer, Warren C. Oliver, William D. Nix, Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients Acta Materialia. ,vol. 53, pp. 1821- 1830 ,(2005) , 10.1016/J.ACTAMAT.2004.12.031
Denis Y. W. Yu, Frans Spaepen, The yield strength of thin copper films on Kapton Journal of Applied Physics. ,vol. 95, pp. 2991- 2997 ,(2004) , 10.1063/1.1644634
E. Arzt, Size effects in materials due to microstructural and dimensional constraints: a comparative review Acta Materialia. ,vol. 46, pp. 5611- 5626 ,(1998) , 10.1016/S1359-6454(98)00231-6
Y. Huang, Z. Xue, H. Gao, W. D. Nix, Z. C. Xia, A study of microindentation hardness tests by mechanism-based strain gradient plasticity Journal of Materials Research. ,vol. 15, pp. 1786- 1796 ,(2000) , 10.1557/JMR.2000.0258
W.W. Gerberich, J.C. Nelson, E.T. Lilleodden, P. Anderson, J.T. Wyrobek, Indentation induced dislocation nucleation: The initial yield point Acta Materialia. ,vol. 44, pp. 3585- 3598 ,(1996) , 10.1016/1359-6454(96)00010-9