RELATIONSHIP BETWEEN MISORIENTATION AND BISMUTH INDUCED EMBRITTLEMENT OF [OOl] TILT BOUNDARY IN COPPER BICRYSTAL
نویسنده
چکیده
The grain boundary embrittlement (GBE) of metal copper caused by bismuth segregation has been extensively studied both experimentally and theoretically(l-10). By using the orientation-controlled bicrystals, the strong dependence of Bi segregation and GBE upon grain boundary(GB) structures has been revealed (3-7). A systematic study of the dependence of the GBE upon the GB structures, for [ 1 lo] tilt Cu-Bi bictystals, indicated that the bicrystals with coincidence site lattice (CSL) boundaries show very different fracture behaviors and depend on both the GB structures and the segregated Bi concentrations(6,7). A systematic investigation of the control factor of the GBE, particularly, the relationship between the GBE and the density of the CSL and the GB energy is still needed.
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