スリップトレース法による V_4C_3 鋼中析出量定量の可能性

概要

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Determination of the amount of V_4C_3 precipitates was carried out by means of "Slip Trace Method" using a 0.03%C-0.25%V steel subjected to a homogeneous dispersion heat treatment including solution treatment, cold working, and aging. Assuming that the shape of V_4C_3 particles was spherical, the calculated amount of V_4C_3 precipitates was 0.184%, which was about 41% larger than that obtained by an electrolytic isolation method (0.133%). The origins of the error introduced into the calculated amount of the precipitates were discussed. Large errors were caused by inaccurate measurement of the shape of precipitates. The inclination of the specimen (thin foil) surface can also become the origin of large error. In addition, the volume fraction of precipitates tends to be overestimated by the existence of strain fields and/or dislocations around the precipitates. It was concluded that application of the "Slip Trace Method" to b.c.c. alloys was not so easy as to f.c.c. alloys since the determination of a unique slip plane from a pair of slip traces was diffiicult because of multiple slip system.
社団法人日本鉄鋼協会の論文
1973-12-01