Time filter

Source Type

Wejdemann C.,Center for Fundamental Research Metal Structures in Four Dimensions | Lienert U.,Argonne National Laboratory | Pantleon W.,Center for Fundamental Research Metal Structures in Four Dimensions
Scripta Materialia | Year: 2010

X-ray peak profiles are measured from individual bulk grains during tensile deformation. Two differently oriented copper samples pre-deformed in tension show the expected peak profile asymmetry caused by intra-grain stresses. One of the samples is oriented to achieve a significant change of the intra-grain stresses during in situ tensile loading and this is observed as a reversal of the sign of the peak profile asymmetry. © 2010 Acta Materialia Inc.


Zhang X.,Tsinghua University | Godfrey A.,Tsinghua University | Hansen N.,Center for Fundamental Research Metal Structures in Four Dimensions | Huang X.,Center for Fundamental Research Metal Structures in Four Dimensions | And 2 more authors.
Materials Characterization | Year: 2010

The evolution of the cementite phase during wet wire drawing of a pearlitic steel wire has been followed as a function of strain. Particular attention has been given to a quantitative characterization of changes in the alignment and in the dimensions of the cementite phase. Scanning electron microscope observations show that cementite plates become increasingly aligned with the wire axis as the drawing strain is increased. Measurements in the transmission electron microscope show that the cementite deforms plastically during wire drawing, with the average thickness of the cementite plates decreasing from 19 nm (ε = 0) to 2 nm (ε = 3.7) in correspondence with the reduction in wire diameter. The deformation of the cementite is strongly related to plastic deformation in the ferrite, with coarse slip steps, shear bands and cracks in the cementite plates/particles observed parallel to either {110}α or {112}α slip plane traces in the ferrite. © 2009 Elsevier Inc. All rights reserved.

Loading Center for Fundamental Research Metal Structures in Four Dimensions collaborators
Loading Center for Fundamental Research Metal Structures in Four Dimensions collaborators