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  • 标题:Commercial Al Li alloy plates have a tendency to form intergranular delamination cracks extending in the rolling direction during fracture.
  • 本地全文:下载
  • 作者:M. Cavallini ; F. Felli ; P. Delogu
  • 期刊名称:Metallurgical Science and Tecnology
  • 印刷版ISSN:0393-6074
  • 出版年度:2013
  • 卷号:9
  • 期号:1
  • 语种:English
  • 出版社:Metallurgical Science and Tecnology
  • 摘要:The poor grain boundary strength induces low toughness failures when the principal stress acts through the thickness. On the other hand, a delamination toughening mechanism occurs when the stress is applied in longitudinal and transverse directions. During fatigue crack growth at low R load ratios a strong closure effect occurs. AES analyses on freshly broken surfaces reveal that intergranular fracture occurs also with absence from the grain boundaries not only of Li, but also of K or Na impurities.
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