期刊
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
卷 78, 期 9, 页码 607-616出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0308-0161(01)00069-2
关键词
casting defects; duplex stainless steel; damage; numerical modelling
Experimental and numerical studies were carried out on CF8M steel with special regard to the influence of casting defects i.e. shrinkage cavities on fracture behaviour. As-received and thermally aged materials were studied. Physical steps of damage in specimens containing casting defects were observed using in-situ tensile tests in a scanning electron microscope. Mechanical properties of duplex stainless steel were characterised using three-point bend tests of three types of specimens - defect free, pre-cracked, and containing shrinkage cavities. These mechanical tests were simulated using Gurson's model including crack nucleation. A modelling of the shrinkage cavities is proposed in order to study their influence on the mechanical response of the specimen. (C) 2001 Elsevier Science Ltd. All rights reserved.
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