Experiments and Modeling to Characterize Microstructure and Hardness in 304L
| Autor: | Joseph D. Puskar, Lisa Anne Deibler, Arthur A. Brown |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Metallurgy Metals and Alloys Recrystallization (metallurgy) 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Grain size law.invention Carbide Grain growth Optical microscope law 0103 physical sciences Knoop hardness test 0210 nano-technology |
| Zdroj: | Metallography, Microstructure, and Analysis. 6:3-11 |
| ISSN: | 2192-9270 2192-9262 |
| Popis: | Drawn 304L stainless steel tubing was subjected to 42 different annealing heat treatments with the goal of initializing a microstructural model to select a heat treatment to soften the tubing from a hardness of 305 Knoop to 225–275 Knoop. The amount of recrystallization and grain size caused by 18 heat treatments were analyzed via optical microscopy and image analysis, revealing the full range of recrystallization from 0 to 100%. The formation of carbides during the longer duration and higher-temperature heat treatments was monitored via transmission electron microscope evaluation. The experimental results informed a model which includes recovery, recrystallization, and grain growth to predict microstructure and hardness. After initialization of the model, it was able to predict hardness with a R 2 value of 0.95 and recrystallization with an R 2 value of 0.99. The model was then utilized in the design and testing of a heat treatment to soften the tubing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink