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Physical background and simulation of creep in steels

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Abstract

The simulative accelerated creep test (ACT) was developed as a response to an overall need of gaining in a short time useful physical data for determining long-term behaviour of materials exposed to operation under stress at elevated temperatures in power generation and chemical processing industries. Additionally, the recently frequent power plant shut-downs due to adding solar/wind power to the net call for creep-fatigue data which standard creep tests cannot provide. In response to these needs, a thermal-mechanical fatigue procedure ACT was designed, taking into account physical phenomena causing microstructure transformation during creep, in particular generation of dislocation substructures, their role in nucleation of voids and cracks, intensification of carbide precipitation and decay of mechanical properties during long-time exposure to elevated temperatures. The actual ACT procedure generates adequate data for calculating true lifetime of the tested creep resisting material for a nominal stress.

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  1. Advanced Materials Analysis, Rigtersbleek-Zandvoort 10-5, NL, 7521 BE, Enschede, Netherlands

    Stan T. Mandziej

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  1. Stan T. Mandziej
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Correspondence to Stan T. Mandziej.

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Mandziej, S.T. Physical background and simulation of creep in steels. Weld World 64, 1119–1134 (2020). https://doi.org/10.1007/s40194-020-00903-5

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  • DOI: https://doi.org/10.1007/s40194-020-00903-5

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