Dynamic fracture toughness of 6061Al composites reinforced with SiC particulates

Lihe Qian, Toshiro Kobayashi, Hiroyuki Toda, Zhong Guang Wang

研究成果: Contribution to journalArticle査読

16 被引用数 (Scopus)

抄録

Dynamic fracture toughness experiments were conducted at room temperature on 6061A1 alloy reinforced with 15 and 25% volume fractions of 9.5μm SiC particulates. The fracture properties were evaluated in terms of crack initiation toughness, crack propagation energy and total absorbed energy. The dynamic fracture of the unreinforced 6061 Al alloy was also studied as a comparison. The results of dynamic tests for both composites and matrix alloy are compared with their respective quasi-static cases. It is found that addition of SiC particles can drastically decrease fracture toughness of 6061 Al alloy at both quasi-static and dynamic loading rates. 15%SiCp composite shows a considerable increase in crack initiation toughness and a much greater increment of crack propagation energy in dynamic loading case compared with static loading case, whereas 25%SiCp composite exhibits a negligible increment of crack propagation energy and a reduced increase of crack initiation energy in dynamic case in contrast to 15%SiCp composite. Detailed SEM examination of the fracture surfaces and optical observation of microstructures beneath the fracture surfaces of both composites, combined with an in-situ SEM observation, were made to investigate the fracture processes of the composites.

本文言語英語
ページ(範囲)189-196
ページ数8
ジャーナルMaterials Science and Engineering A
318
1-2
DOI
出版ステータス出版済み - 11 1 2001
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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