Elastic properties of heat resistant steels after long-term creep exposure

K. Sawada, T. Ohmura, T. Ohba, K. Tsuzaki, F. Abe, K. Kimura, I. Nonaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In order to clarify the effect of microstructural change during aging and creep on elastic modulus, the elastic moduli of aged, crept and serviced materials were investigated. In ferritic steels, the elastic modulus obtained by ultrasonic pulse does not change after long-term aging and creep although the formation of creep voids slightly decreases the elastic modulus. In SUS304 and SUS316, the elastic modulus evaluated by ultrasonic pulse increases during aging due to the precipitation of M 23C 6 carbides, Laves phase and a phase though the elastic modulus decreases during creep because of the formation of creep voids on grain boundaries. The increased elastic modulus of aged material with a large amount of a phase was regarded as that of composite consists of matrix and a phase. For STBA24, the elastic modulus obtained by a high temperature tensile test decreases after long-term service. The tensile test at a higher strain rate was proposed to avoid underestimation of elastic modulus of serviced materials at high temperatures.

Original languageEnglish
Title of host publicationProceedings - ECCC Creep Conference
Subtitle of host publicationCreep and Fracture in High Temperature Components - Design and Life Assessment Issues
Pages268-278
Number of pages11
Publication statusPublished - Dec 1 2005
Externally publishedYes
EventECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues - London, United Kingdom
Duration: Sep 12 2005Sep 14 2005

Publication series

NameProceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues
Volume2005

Other

OtherECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues
CountryUnited Kingdom
CityLondon
Period9/12/059/14/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Sawada, K., Ohmura, T., Ohba, T., Tsuzaki, K., Abe, F., Kimura, K., & Nonaka, I. (2005). Elastic properties of heat resistant steels after long-term creep exposure. In Proceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues (pp. 268-278). (Proceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues; Vol. 2005).