Real-time monitoring dislocations, martensitic transformations and detwinning in stainless steel: Statistical analysis and machine learning
| Autor: | Xiangdong Ding, Boyuan Gou, Jun Sun, Ekhard K. H. Salje, Yan Chen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Condensed matter physics Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Acoustic emission Mechanics of Materials Tension (geology) Martensite Materials Chemistry Ceramics and Composites Statistical analysis Deformation (engineering) 0210 nano-technology Crystal twinning |
| Zdroj: | Journal of Materials Science & Technology. 92:31-39 |
| ISSN: | 1005-0302 |
| Popis: | Acoustic emission (AE) of 316L stainless steel with of low Ni content shows, under tension, simultaneously three avalanche processes. One avalanche process relates to the movement of dislocations, the others to martensitic transformations and detwinning/twinning. Detwinning/twinning occurs predominantly at the early stage of the plastic deformation while martensitic transformations only become observable after large plastic deformation. All processes coincide during deformation with variable effect on AE. An excellent fingerprint for the detection of the coincidence between the several mechanisms is the observation of multivalued E ~ A2 correlations. AE signals from moving dislocations decay more slowly (~ 7×10−3s) and show long avalanche durations. In contrast, AE signals during martensitic transformations and detwinning/twinning decay rapidly ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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