Abstract
A new fatigue strengthening method which is applicable for both the micro-sized materials and ordinary-sized materials have been proposed. Dislocations are pinned at their intersections by the formation of nano-crystals after cold work in this strengthening method. Nano-sized α′-martensite particles, the diameter of which was approximately 5 nm, were formed by a cryogenic treatment at a certain temperature above M sα b (martensite burst starting temperature) in a commercially available 316-type austenitic stainless steel. These nano-particles are considered to be formed at intersections of dislocations. Fatigue life tests using ordinary-sized specimens revealed that high cycle fatigue life of the 316-type austenitic stainless steel was extended by the cryogenic treatment and this is considered to be due to the pinning of dislocations by the formation of nano-sized α′-martensite particles.
| Original language | English |
|---|---|
| Title of host publication | Materials Research Society Symposium - Proceedings |
| Editors | D. Farkas, H. Kung, M. Mayo, H. Swygenhoven, J. Weertman |
| Volume | 634 |
| Publication status | Published - 2001 |
| Externally published | Yes |
| Event | Structure and Mechanical Properties of Nanophase Materials- Theory and Computer Si,ulation v.s Experiment - Boston, MA, United States Duration: 2000 Nov 28 → 2000 Nov 30 |
Other
| Other | Structure and Mechanical Properties of Nanophase Materials- Theory and Computer Si,ulation v.s Experiment |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 00/11/28 → 00/11/30 |
Fingerprint
Keywords
- Fatigue life extension
- Nano-sized α′-martensite
- Pinning dislocations
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
Cite this
Extension of high cycle fatigue life by the formation of nano-sized martensite particles at intersections of dislocations in an austenitic stainless steel. / Inamura, T.; Shimojo, Masayuki; Takashima, K.; Higo, Y.
Materials Research Society Symposium - Proceedings. ed. / D. Farkas; H. Kung; M. Mayo; H. Swygenhoven; J. Weertman. Vol. 634 2001.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Extension of high cycle fatigue life by the formation of nano-sized martensite particles at intersections of dislocations in an austenitic stainless steel
AU - Inamura, T.
AU - Shimojo, Masayuki
AU - Takashima, K.
AU - Higo, Y.
PY - 2001
Y1 - 2001
N2 - A new fatigue strengthening method which is applicable for both the micro-sized materials and ordinary-sized materials have been proposed. Dislocations are pinned at their intersections by the formation of nano-crystals after cold work in this strengthening method. Nano-sized α′-martensite particles, the diameter of which was approximately 5 nm, were formed by a cryogenic treatment at a certain temperature above M sα b (martensite burst starting temperature) in a commercially available 316-type austenitic stainless steel. These nano-particles are considered to be formed at intersections of dislocations. Fatigue life tests using ordinary-sized specimens revealed that high cycle fatigue life of the 316-type austenitic stainless steel was extended by the cryogenic treatment and this is considered to be due to the pinning of dislocations by the formation of nano-sized α′-martensite particles.
AB - A new fatigue strengthening method which is applicable for both the micro-sized materials and ordinary-sized materials have been proposed. Dislocations are pinned at their intersections by the formation of nano-crystals after cold work in this strengthening method. Nano-sized α′-martensite particles, the diameter of which was approximately 5 nm, were formed by a cryogenic treatment at a certain temperature above M sα b (martensite burst starting temperature) in a commercially available 316-type austenitic stainless steel. These nano-particles are considered to be formed at intersections of dislocations. Fatigue life tests using ordinary-sized specimens revealed that high cycle fatigue life of the 316-type austenitic stainless steel was extended by the cryogenic treatment and this is considered to be due to the pinning of dislocations by the formation of nano-sized α′-martensite particles.
KW - Fatigue life extension
KW - Nano-sized α′-martensite
KW - Pinning dislocations
UR - http://www.scopus.com/inward/record.url?scp=0034866324&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034866324&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0034866324
VL - 634
BT - Materials Research Society Symposium - Proceedings
A2 - Farkas, D.
A2 - Kung, H.
A2 - Mayo, M.
A2 - Swygenhoven, H.
A2 - Weertman, J.
ER -