材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
爆発圧縮したCo基合金粉体成形体の強度と破面形態
西田 稔荒木 孝雄水口 勝志森田 真司
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1994 年 43 巻 488 号 p. 533-538

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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 3.6ksec to 32.4ksec at 973K and 1273K. The mechanical property was examined by using a bending test.
The bending strength of the as-compacted material was below 120MPa, 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 500MPa. 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.

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