Fracture Toughness of Nickel Alloy Steel 1.5662
Author Information
Author(s): Afzali Nariman, Stranghöner Natalie, Langenberg Peter
Primary Institution: University of Duisburg-Essen
Hypothesis
Can the principles of the fracture mechanics approach of EN 1993-1-10 be applied to nickel alloy steels?
Conclusion
Nickel alloy steel 1.5662 is suitable for cryogenic applications and exhibits high fracture toughness even at very low temperatures.
Supporting Evidence
- All tested specimens exhibited ductile fracture, even at the extremely low temperature of −196 °C.
- The SENB specimens made from 25 mm plates show slightly higher fracture toughness values than those made from 15 mm plates.
- The master curve concept cannot be applied to nickel alloy steel 1.5662+QT640 due to its exceptional low-temperature fracture toughness.
Takeaway
Nickel alloy steel is really tough, even in super cold temperatures, making it great for things like gas storage tanks.
Methodology
The study involved Charpy-V impact tests and fracture toughness tests on nickel alloy steel 1.5662+QT640 at various temperatures and plate thicknesses.
Limitations
The study only included two plate thicknesses and did not explore a wider range of materials or production methods.
Digital Object Identifier (DOI)
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