Research on Physical Significance of the Larson-Miller Parameter and its Electron Theory for Heat-Resistant Steels

Abstract:

The Larson-Miller parameter (LMP=T(C+log t)) with the determined C-value is suitable to describe the high-temperature ageing behaviour of pearlitic heat resistant steels, such as 12Cr1MoV with C of 20.62, and 15CrMo 20.30. The heat strength parameter Pc was proposed as one property of materials, and heat processing factor P as temperature-time processing parameter. In addition, the relationship between Pc and P was discussed. Then, based on the calculation of valence electron structures by the Empirical Electron Theory of Solid and Molecules (EET), the physical nature and microscopic meaning of C constant in LMP were analyzed, including the effects of carbon content on C-value.

• Periodical: Key Engineering Materials (Volumes 353-358)
• Pages: 477-480
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.353-358.477
• Online since: September 2007
• Authors: Rui Chen Yang, Z. Li, Kui Chen
• Keywords: Larson-Miller Parameter (LMP), Pearlitic Heat-Resistant Steel, Valence Electron Structure (VES)

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