Fracture toughness measurement at cryogenic temperatures using chevron notched specimens

• Publisher: Springer Netherlands
• Year: 1995
• Tongue: English
• Weight: 569 KB
• Volume: 69
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00035032

✦ Synopsis

Structural materials for cryogenic applications should possess a good combination of strength and fracture toughness at the temperature of application. In general, stainless steels and nickel based alloys are most suited for this purpose, but economical considerations have emphasized probing the potential of low carbon steels for such applications specifically just below sub-ambient temperatures. Over the last four decades, such attempts [ 1-7] have been directed to understanding the interrelation between fracture stress or fracture toughness and microstructural aspects like grain size or second phase particle characteristics; and as a consequence, these have aimed at acquiring an in-depth knowledge about cleavage fracture micromechanisms associated with the cracking phenomenon of these materials.