Abstract
Creep-fatigue tests of Type 304 stainless steel were carried out using smooth round bar specimens. Cavities and small cracks initiated inside the specimen were observed on the cross-section by means of a scanning laser microscope. The results obtained are summarized as follows. (1) From the beginning of the creep-fatigue test, spherical cavities appear at random locations on grain boundaries, one after another. (2) The cavities on the grain boundaries perpendicular to the stress axis preferentially grow, and change shape from spherical to flat oblate (or crack-like). (3) When the ligament area on a grain boundary plane reduces to a half, the cavities coalesce and bring about a complete break of the grain boundary, which is defined as the initiation of a small crack. (4) Mean growth rate of cavities and cracks locates in the vicinity of the crack propagation law which can be derived from the relationship between the propagation rate of large crack and creep J-integral range for time-dependent fatigue of Type 304 stainless steel.
| Original language | English |
|---|---|
| Pages (from-to) | 205-218 |
| Number of pages | 14 |
| Journal | Mechanics Time-Dependent Materials |
| Volume | 3 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Computational Mechanics
- Mechanics of Materials
- Materials Science (miscellaneous)
Cite this
Initiation and growth of cavities and cracks along grain boundaries in type 304 stainless steel under creep-fatigue condition. / Tada, Naoya; Kitamura, Takayuki; Ohtani, Ryuichi.
In: Mechanics Time-Dependent Materials, Vol. 3, No. 3, 1999, p. 205-218.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Initiation and growth of cavities and cracks along grain boundaries in type 304 stainless steel under creep-fatigue condition
AU - Tada, Naoya
AU - Kitamura, Takayuki
AU - Ohtani, Ryuichi
PY - 1999
Y1 - 1999
N2 - Creep-fatigue tests of Type 304 stainless steel were carried out using smooth round bar specimens. Cavities and small cracks initiated inside the specimen were observed on the cross-section by means of a scanning laser microscope. The results obtained are summarized as follows. (1) From the beginning of the creep-fatigue test, spherical cavities appear at random locations on grain boundaries, one after another. (2) The cavities on the grain boundaries perpendicular to the stress axis preferentially grow, and change shape from spherical to flat oblate (or crack-like). (3) When the ligament area on a grain boundary plane reduces to a half, the cavities coalesce and bring about a complete break of the grain boundary, which is defined as the initiation of a small crack. (4) Mean growth rate of cavities and cracks locates in the vicinity of the crack propagation law which can be derived from the relationship between the propagation rate of large crack and creep J-integral range for time-dependent fatigue of Type 304 stainless steel.
AB - Creep-fatigue tests of Type 304 stainless steel were carried out using smooth round bar specimens. Cavities and small cracks initiated inside the specimen were observed on the cross-section by means of a scanning laser microscope. The results obtained are summarized as follows. (1) From the beginning of the creep-fatigue test, spherical cavities appear at random locations on grain boundaries, one after another. (2) The cavities on the grain boundaries perpendicular to the stress axis preferentially grow, and change shape from spherical to flat oblate (or crack-like). (3) When the ligament area on a grain boundary plane reduces to a half, the cavities coalesce and bring about a complete break of the grain boundary, which is defined as the initiation of a small crack. (4) Mean growth rate of cavities and cracks locates in the vicinity of the crack propagation law which can be derived from the relationship between the propagation rate of large crack and creep J-integral range for time-dependent fatigue of Type 304 stainless steel.
UR - http://www.scopus.com/inward/record.url?scp=0033307507&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033307507&partnerID=8YFLogxK
U2 - 10.1023/A:1009882719312
DO - 10.1023/A:1009882719312
M3 - Article
AN - SCOPUS:0033307507
VL - 3
SP - 205
EP - 218
JO - Mechanics of Time-Dependent Materials
JF - Mechanics of Time-Dependent Materials
SN - 1385-2000
IS - 3
ER -