Tensile-relaxation behavior of electrodeposited nanocrystalline Ni
作者： Xixun Shen , Changdong Gu , Jianshe Lian , Qing Jiang , Zhonghao Jiang
DOI: 10.1063/1.3476460
关键词:
摘要: The electrodeposited nanocrystalline (nc) Ni with an average grain size of 27 nm by the tensile-relaxation tests shows substantial increase in ductility up to 10.7%–11.8% at all tested strain rates (from 4.17×10−5 4.17 s−1), which is evidently higher than those (6%–10%) attained routine continuous tensile tests; while compared coarse-grained (CG) almost keep invariable under same two kinds tension mode. Additionally, notable stress softening and subsequently parabola convergence flow (i.e., new hardening behavior) upon reloading was only observed nc during tests, illuminates that lacks a permanent dislocation network like CG deformation process.
scitation.org
harvard.edu
aip.org 
sci-hub.se 参考文章(26)
I OVIDKO, A SHEINERMAN, Suppression of nanocrack generation in nanocrystalline materials under superplastic deformation Acta Materialia. ,vol. 53, pp. 1347- 1359 ,(2005) , 10.1016/J.ACTAMAT.2004.11.026
C.C. Koch, D.G. Morris, K. Lu, A. Inoue, Ductility of Nanostructured Materials Mrs Bulletin. ,vol. 24, pp. 54- 58 ,(1999) , 10.1557/S0883769400051551
I. A. Ovid’ko, A. G. Sheinerman, Special strain hardening mechanism and nanocrack generation in nanocrystalline materials Applied Physics Letters. ,vol. 90, pp. 171927- ,(2007) , 10.1063/1.2734393
Jakob Schiøtz, Karsten W Jacobsen, A Maximum in the Strength of Nanocrystalline Copper Science. ,vol. 301, pp. 1357- 1359 ,(2003) , 10.1126/SCIENCE.1086636
S. Brandstetter, P.M. Derlet, S. Van Petegem, H. Van Swygenhoven, Williamson-Hall anisotropy in nanocrystalline metals : X-ray diffraction experiments and atomistic simulations Acta Materialia. ,vol. 56, pp. 165- 176 ,(2008) , 10.1016/J.ACTAMAT.2007.09.007
S. Brandstetter, Ž. Budrović, S. Van Petegem, B. Schmitt, E. Stergar, P. M. Derlet, H. Van Swygenhoven, Temperature-dependent residual broadening of x-ray diffraction spectra in nanocrystalline plasticity Applied Physics Letters. ,vol. 87, pp. 231910- ,(2005) , 10.1063/1.2138359
Khaled M. Youssef, Ronald O. Scattergood, K. Linga Murty, Joseph A. Horton, Carl. C. Koch, Ultrahigh strength and high ductility of bulk nanocrystalline copper Applied Physics Letters. ,vol. 87, pp. 091904- ,(2005) , 10.1063/1.2034122
Yong-Hao Zhao, Xiao-Zhou Liao, Sheng Cheng, En Ma, Yuntian T Zhu, Simultaneously Increasing the Ductility and Strength of Nanostructured Alloys Advanced Materials. ,vol. 18, pp. 2280- 2283 ,(2006) , 10.1002/ADMA.200600310
J. Rajagopalan, J. H. Han, M. T. A. Saif, Plastic deformation recovery in freestanding nanocrystalline aluminum and gold thin films. Science. ,vol. 315, pp. 1831- 1834 ,(2007) , 10.1126/SCIENCE.1137580
Zeljka Budrovic, Helena Van Swygenhoven, Peter M Derlet, Steven Van Petegem, Bernd Schmitt, Plastic Deformation with Reversible Peak Broadening in Nanocrystalline Nickel Science. ,vol. 304, pp. 273- 276 ,(2004) , 10.1126/SCIENCE.1095071