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Assessment of stress corrosion cracking susceptibility by a small punch test
Author(s) -
Yu HyoSun,
Na EviGyun,
Chung SeHi
Publication year - 1999
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.1999.00218.x
Subject(s) - materials science , stress corrosion cracking , acoustic emission , cracking , fracture (geology) , composite material , displacement (psychology) , stress (linguistics) , corrosion , research object , test method , metallurgy , structural engineering , engineering , mathematics , linguistics , philosophy , regional science , psychotherapist , geography , statistics , psychology
The object of this study is to establish a new test method for evaluating stress corrosion cracking (SCC) susceptibility of high‐strength steel using a small punch (SP) test and acoustic emission (AE). A miniaturized specimen (10 × 10 × 0.5 mm) is adopted for SCC evaluation. The experiments are conducted at various loading rates and at various orientations of the specimen. The cumulative average amplitude of the AE signal per unit equivalent fracture strain ( ε qf ) increases as the SCC susceptibility increases. Through the load–displacement behaviour, the fracture energy ( E SP ), the SEM fractographs, and the correlation between the SCC susceptibility and the AE characteristics, it is proved that the small punch test method combined with AE measurements is a useful method to evaluate the SCC susceptibility of high‐strength steel.