The formation of submicrocrystalline structure during severe plastic deformation and its effect on mechanical properties of an S304H austenitic stainless steel with chemical composition of Fe – 0.1C – 0.12N – 0.1Si – 0.95Mn – 18.4Cr – 7.85Ni – 3.2Cu – 0.5Nb – 0.01P – 0.006S (all in mass%) were studied. The severe plastic deformation was carried out by high pressure torsion (HPT) at two different temperatures, i.e., room temperature or 400°C. HPT at room temperature or 400°C led to the formation of a fully austenitic submicrocrystalline structure. The grain size and strength of the steels with ultrafine-grained structures produced by cold or warm HPT were almost the same. The ultimate tensile strengths were 1950 MPa and 1828 MPa after HPT at room temperature and 400°C, respectively.
Original language | English |
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Title of host publication | Superplasticity in Advanced Materials, ICSAM 2015 |
Publisher | Trans Tech Publications Ltd |
Pages | 398-403 |
Number of pages | 6 |
Volume | 838-839 |
ISBN (Print) | 9783038356721 |
DOIs | |
State | Published - 2016 |
Externally published | Yes |
Event | 12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015 - Tokyo, Japan Duration: 6 Sep 2015 → 10 Sep 2015 |
Name | Materials Science Forum |
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Volume | 838-839 |
ISSN (Print) | 0255-5476 |
Conference | 12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015 |
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Country/Territory | Japan |
City | Tokyo |
Period | 6/09/15 → 10/09/15 |
ID: 16947746