کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1583260 | 1514883 | 2008 | 11 صفحه PDF | دانلود رایگان |
The microstructure and texture variations near adiabatic shear localization regions in as-received and pre-shocked 304 stainless steels were investigated using electron backscatter diffraction (EBSD). Shear bands were developed in both steels during a forced dynamic shear deformation produced on a split-Hopkinson pressure bar. EBSD examination revealed large intragranular misorientation gradients toward the shear bands. Taylor factor and misorientation analyses were applied to explain deformation characteristics. Shear-induced deformation structure was observed to be sensitive to both initial microstructure and local orientation. Comparison of as-received and pre-shocked steels indicated that the pre-shocked condition yielded sharper shear band boundaries but moderate misorientation gradients, while the as-received condition led to substantial misorientation adjacent to the band. Shear-induced texture evolution generally resulted in the reorientation of 〈1 1 0〉 toward the shear direction for both cases. Grains with slip systems favorably oriented with respect to the applied shear path displayed less intragranular misorientation development compared to unfavorably oriented grains.
Journal: Materials Science and Engineering: A - Volume 473, Issues 1–2, 25 January 2008, Pages 279–289