| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plastic strain amount estimation device capable of accurately estimating a plastic strain amount of a cast material. <P>SOLUTION: A plastic strain amount estimation device 10 to estimate a plastic strain amount of a cast material comprises: a crystal orientation measurement means 12 which measures a crystal orientation in a manner that selects a region equal to or less than 10 μm from a crystal grain boundary in a same crystal grain among the crystal grains composing a metallographic structure of a plastically-deformed measurement object, divides the region into a plurality of blocks having a same area, and measures the crystal orientations of the respective blocks; a KAM value calculation means 14 which first obtains crystal orientation differences, with one of the plurality of blocks as a reference block, between the reference block and the plurality of the blocks including the reference block and then calculates a KAM value by averaging the crystal orientation differences; and a plastic strain amount estimation means 16 which estimates the plastic strain amount of the measurement object by comparing the KAM value thereof with the preliminary obtained KAM value of the cast material which has the same composition as the measurement object and is subjected to a known plastic deformation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
