Warm prestressing and fractures in structural steel

✍ Scribed by Alan Cottrell

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 288 KB
• Volume: 28
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(87)90046-4

✦ Synopsis

Abetract-Warm

prestressing, by which structural steel can endure stress without lowtemperature brittle fracture after it has previously been exposed to the same stress at a higher temperature, contributes to the effectiveness of preheating in increasing the weldability of steels. It has also been invoked as a safety feature for steel pressure vessels in nuclear reactors. It might be invalidated however by the process of spontaneous delayed brittle fracture. Delayed yielding could cause this, but the effect is likely to be unimportant in practice.