The influence of Specimen Geometry on the J-integral R-curves for a ferritic steel

✍ Scribed by Dr. rer. nat. K. Krompholz; Dipl.-Ing. G. Ullrich

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 452 KB
• Volume: 25
• Category: Article
• ISSN: 0933-5137
• DOI: 10.1002/mawe.19940250209

✦ Synopsis

Abstract

For a ferritic construction steel similar to St37‐2 the cross section of three‐point bend type specimens was selected to be B : w = 1 : 2 and 1 : 1 (B: thickness, w: specimen width, and w = 25 mm was kept constant). For these two geometries the onset of stable crack growth J~0~ was found to be identical, the slope of the J‐integral R‐curves revealed only small differences. A small size defect in the microstructure of one specimen delivered a pronounced change in the tearing modulus. The reserve in stable crack growth is small. The results of this material is compared with the results obtained earlier for the nuclear grade material A 533 B1 in connection with different crack length to specimen width ratios.