An investigation of the blunting line

✍ Scribed by S.-W. Yin; R.A. Gerbrands; M. Hartevelt

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 625 KB
• Volume: 18
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(83)90074-7

✦ Synopsis

Ahstraet-Experimental evidence obtained on 3-point SENB specimens of carbon steel (St52-3) is used to compare ways of determining the slope of the "blunting line" in JfC testing. The results demonstrate that the slope of the blunting line obtained by the stretched zone width (SZW) method is steeper than the blunting line predicted by the ASTM method. This results in lower values for both JI, and (Au), as determined with the SZW method, compared with those obtained by the ASTM method. The increased conservatism compared to the ASTM approach and the experimental evidence underlying it recommend the SZW method for further study. The subsequent widespread use expected for any recognized JrC determination seems to justify the additional effort and expenses associated with the SZW method.