| 摘要 |
PROBLEM TO BE SOLVED: To accurately estimate the remaining life of a member made of stainless steel in an early stage.SOLUTION: Whether a &sgr; phase exists on a surface in a predetermined observation range of a target member made of stainless steel is determined. When the &sgr; phase is determined to exist, whether a void core exists on a &sgr;-phase boundary surface is determined. When the void core is determined to exist, the occupancy rate of the void core in the observation range is determined, and the remaining life of the member is estimated on the basis of the determined occupancy rate and a previously created calibration curve 32 showing the relationship between the occupancy rate of the void core in the stainless steel and the remaining life. |
