TY - JOUR
T1 - Characterization of structural embrittlement of creep crack growth for W-added 12%Cr ferritic heat-resistant steel related to the multiaxial stress
AU - Sugiura, Ryuji
AU - Yokobori, A. Toshimitsu
AU - Tabuchi, Masaaki
AU - Fuji, Akio
AU - Adachi, Takeshi
PY - 2009/1
Y1 - 2009/1
N2 - In components under static creep loading condition, the multiaxial stress fields appear due to the plastic constraint and they produce a more brittle type cracking behavior. From a practical standpoint, the characterizations of creep crack growth rates under the multiaxial stress field are important to improve the methods for creep life extension. In this paper, creep crack growth tests were conducted using round bar specimens with sharp circular notches for tungsten-added 12%Cr ferritic heat-resistant steel (W12%Cr steel), and the effect of multiaxiality on creep ductility and creep crack growth rate were investigated. Furthermore, three-dimensional elastic-plastic creep finite element analyses were conducted to clarify the effect of multiaxiality on creep crack growth.
AB - In components under static creep loading condition, the multiaxial stress fields appear due to the plastic constraint and they produce a more brittle type cracking behavior. From a practical standpoint, the characterizations of creep crack growth rates under the multiaxial stress field are important to improve the methods for creep life extension. In this paper, creep crack growth tests were conducted using round bar specimens with sharp circular notches for tungsten-added 12%Cr ferritic heat-resistant steel (W12%Cr steel), and the effect of multiaxiality on creep ductility and creep crack growth rate were investigated. Furthermore, three-dimensional elastic-plastic creep finite element analyses were conducted to clarify the effect of multiaxiality on creep crack growth.
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U2 - 10.1115/1.3026544
DO - 10.1115/1.3026544
M3 - Article
AN - SCOPUS:77955369934
VL - 131
SP - 110041
EP - 110049
JO - Journal of Engineering Materials and Technology, Transactions of the ASME
JF - Journal of Engineering Materials and Technology, Transactions of the ASME
SN - 0094-4289
IS - 1
ER -