Experimental characterization of microstructure development during loading path changes in bcc sheet steels
Experimental characterization of microstructure development during loading path changes in bcc sheet steels
复制标题
BCC 钢板加载路径变化期间微观结构发展的实验表征
DOI:
10.1007/s10853-012-6780-9
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发表时间:
2013
影响因子:
4.5
通讯作者:
Zillmann
中科院分区:
文献类型:
--
作者:
Clausmeyer;Gerstein;Bargmann;Svendsen;van den Boogaard;Zillmann
Interstitial free sheet steels show transient work hardening behavior, i.e., the Bauschinger effect and cross hardening, after changes in the loading path. This behavior affects sheet forming processes and the properties of the final part. The transient work hardening behavior is attributed to changes in the dislocation structure. In this work, the morphology of the dislocation microstructure is investigated for uniaxial and plane strain tension, monotonic and forward to reverse shear, and plane strain tension to shear. Characteristic features such as the thickness of cell walls and the shape of cells are used to distinguish microstructural patterns corresponding to different loading paths. The influence of the crystallographic texture on the dislocation structure is analyzed. Digital image processing is used to create a “library” of schematic representations of the dislocation microstructure. The dislocation microstructures corresponding to uniaxial tension, plane strain tension, monotonic shear, forward to reverse shear, and plane strain tension to shear can be distinguished from each other based on the thickness of cell walls and the shape of cells. A statistical analysis of the wall thickness distribution shows that the wall thickness decreases with increasing deformation and that there are differences between simple shear and uniaxial tension. A change in loading path leads to changes in the dislocation structure. The knowledge of the specific features of the dislocation structure corresponding to a loading path may be used for two purposes: (i) the analysis of the homogeneity of deformation in a test sample and (ii) the analysis of a formed part.
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DOI:
--
发表时间:
2005
期刊:
影响因子:
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作者:
G. Vincze;E. Rauch;J. Gracio;F. Barlat;A. Lopes
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1972
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1969
期刊:
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作者:
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通讯作者:
P. Rothenbacher
DOI:
10.1007/s11661-001-0042-9
发表时间:
2001-10-01
影响因子:
2.8
作者:
Nesterova, EV;Bacroix, B;Teodosiu, C
通讯作者:
Teodosiu, C