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Isothermes und anisothermes Kriechverhalten der Nickelbasislegierung Alloy 602 CA
Author(s) -
Schwing R.,
Linn S.,
Kontermann C.,
Neubert S.,
Oechsner M.
Publication year - 2021
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202000248
Subject(s) - creep , isothermal process , temperature cycling , materials science , alloy , metallurgy , nickel , nickel alloy , superalloy , atmospheric temperature range , thermal , composite material , thermodynamics , physics
Components in industrial furnaces and apparatus construction are usually exposed to temperatures up to 1,200 °C as well as mechanical loading and corrosive attack of the environmental atmosphere. Furthermore, they undergo numerous temperature cycles in service. To describe the characteristics of the nickel base Alloy 602 CA, which is often used in this industrial sector, the long term creep behavior of this alloy was studied at temperatures from 800 °C to 1,200 °C with and without thermal cycling. During these tests unexpected effects could be noticed. At load levels representing typical component loads and isothermal temperature control an anomalous decrease in creep rate in the third creep stage was observed. Experiments under thermal cycling showed a considerably higher creep rate in the whole range than in the isothermal case. Within the present article, these findings are outlined in detail together with a brief discussion of causes and consequences based on extensive microstructural examinations.