Microtexture formation of Ni99B1 alloys solidified on an ESL and an EML—a study based on the EBSP technique

摘要: Abstract We employed an electrostatic levitator (ESL) and electromagnetic (EML) to solidify Ni 99 B 1 (at.%) alloys at various undercoolings. The microstructures microtextures were revealed by using the electron backscatter diffraction pattern (EBSP) technique in a scanning microscope. It is found that no significant refinement can be identified low medium undercooling regimes for primary trunk sample solidified on ESL, while fragmentation of secondary even tertiary branches may take place generate equiaxed grains. Further investigation EBSP reveals neighboring grains have small misorientation angles, which ascribed absence mechanical stirring from eddy current. A sharp contrast samples EML undercoolings refined microstructures. mapping yielded random distribution crystallographic orientations among grains, indicating (EMS) induced field plays vital role promoting thus generating orientation. Regarding microstructure high undercoolings, difference arises processed between ESL.