Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L)
The present study compares the mechanical properties and electrochemical behaviour of austenitic (AISI 316 L) stainless steel compacted at different pressures (200, 400 and 600 MPa), which are conventionally sintered at supersolidus temperature of 1,400°C. As expected, increase in compaction pressur...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2019-02-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2019-0032 |
| _version_ | 1818733717848326144 |
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| author | Kandala S. Ramakrishna Balani Kantesh Upadhyaya Anish |
| author_facet | Kandala S. Ramakrishna Balani Kantesh Upadhyaya Anish |
| author_sort | Kandala S. Ramakrishna |
| collection | DOAJ |
| description | The present study compares the mechanical properties and electrochemical behaviour of austenitic (AISI 316 L) stainless steel compacted at different pressures (200, 400 and 600 MPa), which are conventionally sintered at supersolidus temperature of 1,400°C. As expected, increase in compaction pressure (from 200 MPa) to 600 MPa has shown decreased shrinkage (from 7.3% to 4.2% radial and 5.5% to 3.4% axial, respectively) and increased densification (up to ~92%). Their electrochemical behaviour was investigated in 0.1 N H2SO4 solution by potentiodynamic polarization and electrochemical impedance spectroscopy. The mechanical properties (such as yield-, tensile- and transverse rupture strength) and electrochemical behaviour with pressure have been correlated with densification response and microstructure (pore type, volume and morphology). Highest densification (~92% theoretical) achieved at 600 MPa (compaction pressure) and 1,400°C (sintering temperature) resulted in excellent combination of tensile strength and ductility (456 ± 40 MPa and 25 ± 1.1% respectively), while showing lowest corrosion rate (0.1 mmpy or 4.7 mpy) due to the presence of isolated porosity in the sintered samples. |
| first_indexed | 2024-12-17T23:53:55Z |
| format | Article |
| id | doaj.art-970f1d5454eb4bff8bc7711bdf906a40 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-17T23:53:55Z |
| publishDate | 2019-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-970f1d5454eb4bff8bc7711bdf906a402022-12-21T21:28:08ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242019-02-0138201979280510.1515/htmp-2019-0032Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L)Kandala S. Ramakrishna0Balani Kantesh1Upadhyaya Anish2Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur208016, IndiaDepartment of Materials Science and Engineering, Indian Institute of Technology, Kanpur208016, IndiaDepartment of Materials Science and Engineering, Indian Institute of Technology, Kanpur208016, IndiaThe present study compares the mechanical properties and electrochemical behaviour of austenitic (AISI 316 L) stainless steel compacted at different pressures (200, 400 and 600 MPa), which are conventionally sintered at supersolidus temperature of 1,400°C. As expected, increase in compaction pressure (from 200 MPa) to 600 MPa has shown decreased shrinkage (from 7.3% to 4.2% radial and 5.5% to 3.4% axial, respectively) and increased densification (up to ~92%). Their electrochemical behaviour was investigated in 0.1 N H2SO4 solution by potentiodynamic polarization and electrochemical impedance spectroscopy. The mechanical properties (such as yield-, tensile- and transverse rupture strength) and electrochemical behaviour with pressure have been correlated with densification response and microstructure (pore type, volume and morphology). Highest densification (~92% theoretical) achieved at 600 MPa (compaction pressure) and 1,400°C (sintering temperature) resulted in excellent combination of tensile strength and ductility (456 ± 40 MPa and 25 ± 1.1% respectively), while showing lowest corrosion rate (0.1 mmpy or 4.7 mpy) due to the presence of isolated porosity in the sintered samples.https://doi.org/10.1515/htmp-2019-0032austenitic stainless steelcompaction pressuresupersolidus sinteringdensificationelectrochemical behaviour |
| spellingShingle | Kandala S. Ramakrishna Balani Kantesh Upadhyaya Anish Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L) High Temperature Materials and Processes austenitic stainless steel compaction pressure supersolidus sintering densification electrochemical behaviour |
| title | Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L) |
| title_full | Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L) |
| title_fullStr | Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L) |
| title_full_unstemmed | Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L) |
| title_short | Mechanical and Electrochemical Characterization of Supersolidus Sintered Austenitic Stainless Steel (316 L) |
| title_sort | mechanical and electrochemical characterization of supersolidus sintered austenitic stainless steel 316 l |
| topic | austenitic stainless steel compaction pressure supersolidus sintering densification electrochemical behaviour |
| url | https://doi.org/10.1515/htmp-2019-0032 |
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