Evaluation of thermal aging of δ-ferrite in austenitic stainless steel weld using nanopillar compression test
| Autor: | Ho Jung Lee, Jaewon Heo, Kyoung Soo Lee, Gokul Obulan Subramanian, Byeong Seo Kong, Changheui Jang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Spinodal decomposition Mechanical Engineering Metals and Alloys Thermal aging 02 engineering and technology Welding engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences law.invention Mechanics of Materials law Ferrite (iron) 0103 physical sciences Hardening (metallurgy) engineering General Materials Science Composite material Austenitic stainless steel 0210 nano-technology Nanopillar |
| Zdroj: | Scripta Materialia. 155:32-36 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2018.06.016 |
| Popis: | The effects of thermal aging on microstructure and mechanical property change of δ-ferrite in an austenitic stainless steel weld were investigated. After thermal aging at 400 °C for 20,000 h, spinodal decomposition and G phase precipitation were observed, along with ~80% increase in yield strength measured by nanopillar compression test. Subsequent reversion heat treatment removed spinodal decomposition while leaving G phase, resulting in partial recovery of hardening in δ-ferrite. It was estimated that ~60% of the hardening in the δ-ferrite of the aged specimen was attributed to spinodal decomposition and ~40% to G phase, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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