To highly accurately determine a direction of drawing a reference line when diagnosing the residual life of a metal subjected to creep damage by an A parameter method.
A residual life diagnosis method includes: an image acquisition step (S3) of acquiring image data of a grain boundary by microscopically imaging a metal replica; virtual reference-line drawing steps (S5, S6, and S8) of drawing a plurality of virtual reference line data items with different directions, on the image data; void counting steps (S7 and S8) of counting void image data items on the grain boundary data for each of the virtual reference line data items; and a reference line determining step (S9) of determining the virtual reference line data item with the maximal number of void image data items, as the reference line data item. The residual life of the metal is diagnosed by using the A parameter method.
NISHIDA HIDETAKA
MATSUMURA SHIGEO
| JP2010014600A | 2010-01-21 | |||
| JP2008209344A | 2008-09-11 | |||
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| JP2010223823A | 2010-10-07 | |||
| JPH075086A | 1995-01-10 | |||
| JPH05164685A | 1993-06-29 | |||
| JP2013079916A | 2013-05-02 |
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