Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 27, Issue 5, Pages 2060-2069Publisher
SPRINGER
DOI: 10.1007/s11665-018-3309-7
Keywords
Inconel 718 alloy; mechanical properties; microstructure; powder metallurgy; ultralow temperature
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Funding
- National Natural Science Foundation of China [U1637210]
- Project of Innovation-driven Plan in Central South University [51271203]
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The microstructures and mechanical properties of powder metallurgy Inconel 718 alloy were investigated in the temperatures range between 25 and - 253 A degrees C. Tensile strength increased with the decrease in temperature, while the ductility first increased and then decreased. There was no significant change in impact toughness. When the temperature was - 253 A degrees C, a zigzag stress-strain curve was observed for the alloy, owing to the interaction of dislocation glide and twinning, which effectively maintained the relatively good ductility.
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