Cryogenic temperature near-threshold fatigue crack growth rate data for JBK-75 stainless steel

✍ Scribed by P.K. Liaw; W.A. Logsdon; M.H. Attaar

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 303 KB
• Volume: 23
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(83)90185-6

✦ Synopsis

An important structural component of the Westinghouse Large Coil Programme superconducting magnet is the JBK-75 (modified A-286) stainless steel conductor sheath. Because the presence of pre-existing cracl(s or flaws in the conductor sheath is a potential possibility, the structural reliability of the conductor sheath would be enhanced ff a threshold level of stress intensity range (AKth) was established below which fatigue crack growth would not occur. Consequently, near-threshold fatigue growth rate data were generated at two load ratios on JBK-75 stainless steel at room and cryogenic temperatures. No load ratio effect on near-threshold fatigue crack growth rate was observed at cryogenic temperatures.