Influence of temperature and strain rate on tensile deformation and fracture behaviour of boron added P91 steel
| Autor: | J. Christopher, B.K. Choudhary |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering chemistry.chemical_element 02 engineering and technology Work hardening Atmospheric temperature range Strain rate Flow stress 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering chemistry Mechanics of Materials Ultimate tensile strength Fracture (geology) General Materials Science Deformation (engineering) Composite material Boron |
| Zdroj: | International Journal of Pressure Vessels and Piping. 171:153-161 |
| ISSN: | 0308-0161 |
| DOI: | 10.1016/j.ijpvp.2019.02.014 |
| Popis: | Tensile tests were performed at the strain rates ranging from 3.16 × 10−5 to 1.26 × 10−3 s−1 over a temperature range 300–873 K to examine the influence of temperature and strain rate on tensile deformation and fracture behaviour of boron added P91 ferritic steel. The variations of flow stress/strength values, work hardening rate and tensile ductility with respect to temperature exhibited three distinct temperature regimes. The steel exhibited anomalous variations in tensile properties due to dynamic strain ageing occurring at intermediate temperatures and the dominance of dynamic recovery at high temperatures. The fracture mode remained transgranular. Presence of large amount of chisel tip appearance along with dimples at 300 K and dominance of ductile dimples at intermediate and high temperatures were observed. Boron added P91 steel with reduced nitrogen exhibited strength values comparable to those reported for the plates and tubes of P91 steel. |
| Databáze: | OpenAIRE |
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