爆発圧縮したCo基合金粉体成形体の強度と破面形態(フラクトグラフィ特集)

概要

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Co-based alloy powders were dynamically compacted by using a cylindrical axisymmetric explosive method. The compacted powders were post-heat-treated in evacuated capsules from 3.6 ksec to 32.4 ksec at 973K and 1273K. The mechanical property was examined by using a bending test. The bending strength of the as-compacted material was below 120 MPa, which is about one-fifth that of the cast material. The fracture pattern of the as-compacted material exhibited interparticle fracture. The strength of the compacted material was improved by post-heat-treatments at 1273K. But the strength was below 500 MPa. The fracture pattern of transparticle fracture exhibited the quasi-cleavage fracture and in the case of the interparticle fracture the dimple pattern was observed on the powder surface.
社団法人日本材料学会の論文
1994-05-15