Abstract
The requirements for the specimen size in general, the fracture process zones and the validity of the results in the ductile to brittle transition region in fracture toughness testing are examined. Based on literature studies it is proposed that J-integral describes the cleavage fracture initiation event as long as the ligament size is b≥50 /J/σflow). At higher load levels the effective load Jeff becomes constant and ductile tearing will precede cleavage fracture. The experimental part consists of Acoustic Emission measurements during J-integral tests. The rapid diminishing of the AE, which is due to the cessation of the growth of the plastic zone, implies the reaching of a maximun Jeff level. Corresponding ligament size requirement is b≥44-75 (J/σflow).
Original language | English |
---|---|
Title of host publication | Strength of Metals and Alloys (ICSMA 8) |
Subtitle of host publication | Proceedings of the 8th International Conference On The Strength Of Metals and Alloys |
Place of Publication | Tampere |
Publisher | Tampereen teknillinen korkeakoulu |
Pages | 1165-1169 |
Volume | 3 |
ISBN (Print) | 978-0-08-034804-9 |
DOIs | |
Publication status | Published - 1988 |
MoE publication type | A4 Article in a conference publication |
Event | 8th International Conference on Strength of Metals and Alloys, ICSMA 8 - Tampere, Finland Duration: 22 Aug 1988 → 26 Aug 1988 |
Conference
Conference | 8th International Conference on Strength of Metals and Alloys, ICSMA 8 |
---|---|
Country/Territory | Finland |
City | Tampere |
Period | 22/08/88 → 26/08/88 |