Effects of pretest aging on creep crack growth properties of type 308 austenitic stainless steel weld metals

✍ Scribed by S Konosu; H Mashiba; M Takeshima; T Ohtsuka

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 503 KB
• Volume: 8
• Category: Article
• ISSN: 1350-6307
• DOI: 10.1016/s1350-6307(99)00047-3

✦ Synopsis

Type 308 austenitic stainless steel weld metals made by SMAW and FCAW were used in order to quantitatively determine the eects of bismuth segregation and sigma phase precipitation as a result of high temperature pretest aging on creep crack growth properties. Tests were conducted using CT-type specimens and the data derived were arranged according to the parameter C Ã . The creep crack growth rate is signi®cantly higher in cases where the metal contains a large amount of bismuth and where sigma phases have adequately precipitated.