Effect of annealing time on grain boundary characteristics of C71500 cupronickel alloy tubes with different deformation

Compression tests were performed on Fe-3%Si specimens with few grains. The deformation microstructure and microtexture were investigated by electron backscatter diffraction (EBSD) and related to the initial crystal orientation and grain boundary characteristics. Groups of microbands were found that are characterised by a periodic change in crystal orientation, shear at the grain boundary, and the formation of new grains. It is supposed that these microband groups represent an early stage of microshear band development.

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Effect of Grain Boundary Characteristics on Lattice Orientations

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.26-28.1003 ◽

2007 ◽

Vol 26-28 ◽

pp. 1003-1006 ◽

Cited By ~ 1

Author(s):

Jae Hyung Cho

Keyword(s):

Grain Boundary ◽

Grain Boundaries ◽

Three Dimensional ◽

Microstructural Characterization ◽

Grain Boundary Character Distribution ◽

Average Scheme ◽

Plane Normal ◽

Grain Boundary Characteristics ◽

Correlation Parameters ◽

Boundary Characteristics

Grain boundary characteristics are defined by five parameter, grain boundary plane normal and misorientation angle/axis between two adjacent grains. The influence of the grain boundary character distribution on lattice evolution during deformation was investigated using three-dimensional crystal plasticity finite element method (CPFEM). Various combinations of grain boundaries were modeled systematically. In analyzing the numerical microstructural characterization obtained by the simulation, orientation average scheme and correlation parameters between misorientation and its special distribution are used. Inter- and intra-grain structures were investigated using the spatial distribution of lattice orientation. Main emphasis was placed on misorientation distributions around grain boundaries, where grain interaction mainly occurred.

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Microstructure Evolution and Grain Boundary Characteristics of Oriented Silicon Steel during Primary Recrystallization in a Pulsed Magnetic Field

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.139 ◽

2013 ◽

Vol 690-693 ◽

pp. 139-146 ◽

Cited By ~ 1

Author(s):

Li Hua Liu ◽

Li Juan Li ◽

Qi Jie Zhai

Keyword(s):

Magnetic Field ◽

Grain Size ◽

Magnetic Fields ◽

Grain Boundary ◽

Microstructure Evolution ◽

Silicon Steel ◽

Pulsed Magnetic Field ◽

Magnetic Annealing ◽

Grain Boundary Characteristics ◽

Boundary Characteristics

The effects of a 2 T pulsed magnetic field primary annealing process on microstructure evolution and grain boundary characteristics in two-stage cold-rolled silicon steel were examined. Pulsed magnetic annealing increased grain size through the application of relatively smaller intensity of magnetic fields (2 T), compared to steady magnetic annealing. The effect of increasing grain size may be attributed to the magnetic acceleration effect of boundary motion under magnetic pulse conditions. Pulsed magnetic annealing may serve to enhance the relative intensity of the {111} component and decrease the frequency of low-angle misorientations. Repeated magnetostriction induced by pulsed magnetic field applications may accelerate overall dislocation motion. These findings suggest that pulsed magnetic fields require relatively lower intensities than steady magnetic fields to achieve superior results, providing a potentially viable alternative for industrial annealing processes for electrical steels.

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Iron-clad MgB2Superconductor Wires

MRS Proceedings ◽

10.1557/proc-689-e1.2 ◽

2001 ◽

Vol 689 ◽

Cited By ~ 3

Author(s):

S. Jin ◽

H. Mavoori ◽

C. Bower ◽

R. B. van Dover

Keyword(s):

Grain Boundary ◽

Critical Current ◽

Practical Method ◽

Processing Parameters ◽

Composite Wire ◽

Grain Boundary Characteristics ◽

Boundary Characteristics

ABSTRACTThe fabrication of bulk, stoichiometric MgB2wires is a challenge because of the difficulties associated with the volatility and reactivity of magnesium and the brittleness of MgB2. Metal-clad processing of MgB2is a convenient, practical method of overcoming these problems. With such a fabrication approach, iron-clad MgB2superconductor wires exhibiting desirable characteristics with the transport Jcof ∼105 A/cm2at 4.2K have been obtained. In this paper, understanding of the composite wire structures, effect of processing parameters, grain boundary characteristics, and critical current bahavior of the MgB2wires will be described.

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