Fivefold annealing twin in nanocrystalline Cu

Huang, P.; Dai, G. Q.; Wang, F.; Xu, K. W.; Li, Y. H.
November 2009
Applied Physics Letters;11/16/2009, Vol. 95 Issue 20, p203101
Academic Journal
Fivefold annealing twin has been observed in nanocrystalline Cu at zero external stress. The microstructure of the multifold twins at various annealing temperatures has been examined by transmission electron microscopic in detail. Contrary to the well known sequential twinning mechanism, coherent twin boundaries formed via migration of grain boundary segment were proposed to be the dominant mechanism of fivefold annealing twin, which associated with grain growth during annealing. Moreover, the possibilities of the proposed mechanism may operate in forming fivefold deformation twin were discussed.


Related Articles

  • Bimodal growth of the nanophases in the dual-phase composites produced by mechanical alloying in immiscible Cu—Ag system. Zhu, M.; Wu, Z. F.; Zeng, M. Q.; Ouyang, L. Z.; Gao, Y. // Journal of Materials Science;May2008, Vol. 43 Issue 9, p3259 

    Annealing was carried out to produce Ag–Cu dual-nanophase composite by decomposing Ag–Cu supersaturated solid solution prepared by ball-milling. Differential scanning calorimetry, X-ray diffraction, and transmission electron microscopy were used to characterize the growth kinetics...

  • Microstructural evolution of bulk nanocrystalline Ni during creep. Chauhan, Manish; Mohamed, Farghalli A. // Journal of Materials Science;Mar2007, Vol. 42 Issue 5, p1606 

    Experiments were conducted on electrodeposited (ED) nanocrystalline (nc) Ni with an average initial grain size of about 20 nm at 393 K to study the shape of the creep curves. In addition, microstructure was examined by means of transmission electron microscopy (TEM). The results show that the...

  • Characterization of nanocrystalline materials by X-ray line profile analysis. Ungár, Tamás // Journal of Materials Science;Mar2007, Vol. 42 Issue 5, p1584 

    X-ray line profile analysis is shown to be a powerful tool to characterize the microstructure of nanocrystalline materials in terms of grain and subgrain size, dislocation structure and dislocation densities and planar defects, especially stacking faults and twin boundaries. It is shown that the...

  • Grain-boundary relaxation and its effect on plasticity in nanocrystalline Fe. Jang, D.; Atzmon, M. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p083504 

    Grain-boundary relaxation in nanocrystalline Fe was studied by high-resolution transmission electron microscopy (HREM), and its effect on plasticity was characterized by nanoindentation. Samples with grain size of 9.8 nm were synthesized by mechanical attrition and subsequently annealed at low...

  • Deformation twinning in nanocrystalline copper at room temperature and low strain rate. Liao, X. Z.; Zhao, Y. H.; Srinivasan, S. G.; Zhu, Y. T.; Vallev, R. Z.; Gunderov, D. V. // Applied Physics Letters;1/26/2004, Vol. 84 Issue 4, p592 

    The grain-size effect on deformation twinning in nanocrystalline copper is studied. It has been reported that deformation twinning in coarse-grained copper occurs only under high strain rate and/or low-temperature conditions. Furthermore, reducing grain sizes has been shown to suppress...

  • Model of {110}〈001〉 Texture Formation in Shear Bands during Cold Rolling of Fe-3 Pct Si Alloy. Rusakov, G. M.; Lobanov, M. L.; Redikultsev, A. A.; Kagan, I. V. // Metallurgical & Materials Transactions. Part A;May2009, Vol. 40 Issue 5, p1023 

    A shear band formation model during the cold rolling of Fe-3 Pct Si alloy is advanced. The model assumes a two-stage mechanism based on abnormal twinning according to the {114}〈221〉 system and secondary twinning in two standard {112}〈111〉 systems. As a result, the...

  • Kinetic roughening of a ZnO grain boundary. Sung Bo Lee; Young-Min Kim; Dong-Su Ko; Tae-Young Ahn; Young-Woon Kim; Jucheol Park // Applied Physics Letters;5/10/2010, Vol. 96 Issue 19, p191906 

    Using a model ZnO bicrystal, we examine grain boundary kinetics by high-resolution transmission electron microscopy. The grain boundary undergoes a transition from atomically stepped to undulating appearances with increasing driving force for migration at a given temperature, producing clear...

  • Ordered and twinned multidomain structure in highly Al-rich mullite. Wang, H. Z.; Kulkarni, T.; Sarin, V. K.; Basu, S. N. // Journal of Materials Research;Nov2007, Vol. 22 Issue 11, p10 

    The structure of a region of a highly Al-rich mullite (Al4+2xSi2-2xO10-x with χ ~ 0.82; 47Al2O3-6SiO2; Al/Si ~16) in a chemically vapor-deposited, functionally graded mullite coating was studied by high-resolution transmission electron microscopy. The region consisted of a fully ordered and...

  • Thermal conductivity anisotropy and grain structure in Ge2Sb2Te5 films. Lee, Jaeho; Li, Zijian; Reifenberg, John P.; Lee, Sangchul; Sinclair, Robert; Asheghi, Mehdi; Goodson, Kenneth E. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 8, p084902 

    Although lateral thermal conduction in Ge2Sb2Te5 (GST) films can influence the performance of phase change memory (PCM), there are no data available for the in-plane thermal conductivity. This work measures both the in-plane and the out-of-plane thermal conductivities for the amorphous,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics