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 language | English |
|---|---|
| Title of host publication | Proceedings - ECCC Creep Conference |
| Subtitle of host publication | Creep and Fracture in High Temperature Components - Design and Life Assessment Issues |
| Pages | 268-278 |
| Number of pages | 11 |
| Publication status | Published - Dec 1 2005 |
| Externally published | Yes |
| Event | ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues - London, United Kingdom Duration: Sep 12 2005 → Sep 14 2005 |
Publication series
| Name | Proceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues |
|---|---|
| Volume | 2005 |
Other
| Other | ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues |
|---|---|
| Country | United Kingdom |
| City | London |
| Period | 9/12/05 → 9/14/05 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
Elastic properties of heat resistant steels after long-term creep exposure. / Sawada, K.; Ohmura, T.; Ohba, T.; Tsuzaki, K.; Abe, F.; Kimura, K.; Nonaka, I.
Proceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues. 2005. p. 268-278 (Proceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues; Vol. 2005).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Elastic properties of heat resistant steels after long-term creep exposure
AU - Sawada, K.
AU - Ohmura, T.
AU - Ohba, T.
AU - Tsuzaki, K.
AU - Abe, F.
AU - Kimura, K.
AU - Nonaka, I.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33746508774&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33746508774&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33746508774
SN - 1932078495
SN - 9781932078497
T3 - Proceedings - ECCC Creep Conference: Creep and Fracture in High Temperature Components - Design and Life Assessment Issues
SP - 268
EP - 278
BT - Proceedings - ECCC Creep Conference
ER -