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THE RESIDUAL STRAIN, DISLOCATION AND TWIN IN Gr(C)/Mg COMPOSITE |
WU Feng; ZHU Jing (School of Materials Science and Engineering; Tsinghua University; Beijing 100084)(Central Iron and Steel Research Institute; Beijing 100081) |
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Cite this article:
WU Feng; ZHU Jing (School of Materials Science and Engineering; Tsinghua University; Beijing 100084)(Central Iron and Steel Research Institute; Beijing 100081). THE RESIDUAL STRAIN, DISLOCATION AND TWIN IN Gr(C)/Mg COMPOSITE. Acta Metall Sin, 1998, 34(5): 449-454.
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Abstract The investigation on the microstructure of the residual strain, dislocation and twin nearby interfaces resulted from the thermal stress in Gr(C)/Mg composite has been carried out in this work. The dislocations sprout at interfaces between Gr(C) and the matrix and move towards matrix under the axial, radial and tangential stresses. There is a strain layer with a thickness of about 150 nm nearby the Gr(C) fiber, and the strain is concentrated in narrow areas of the matrix. The formation of twins occurs at one interface and usually ends at a neighbor interface. As the twin is thick, it may cause the neighbor interface apart.
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Received: 18 May 1998
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