Simultaneous reductions of dislocation and twin densities with grain growth during cold rolling in a nanocrystalline Ni-Fe- alloy.

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Scr. Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2008.10.031· OSTI ID:951255

LI, L; Ungar, T; Wang, Y D; Fan, G J; Yang, Y L; Jia, N; Ren, Y; Tichy, G; Lendvai, J; Choo, H; Liaw, P K

Microstructures in nanocrystalline Ni-Fe alloys during cold rolling are quantitatively investigated by synchrotron high-energy X-ray diffraction. It is found that rolling leads to an obvious reduction in the densities of both dislocations and twins and an increase in crystallite size. A huge dislocation flux flows through the grains during rolling, even though only a small fraction remains in the specimen after rolling. A mechanically induced relaxation of the initial high-excited state of materials is revealed.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF); IMI Program; Hungarian National Science Foundation; National Natural Science Foundation of China (NNSFC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 951255
• Report Number(s): ANL/XSD/JA-63625; SCMAF7; TRN: US0902173
• Journal Information: Scr. Materialia, Vol. 60, Issue 5 ; 2009; ISSN 1359-6462
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ALLOYS
DISLOCATIONS
GRAIN GROWTH
RELAXATION
ROLLING
SYNCHROTRONS
X-RAY DIFFRACTION