FEM-thermodynamic simulation methodology to predict the influence of t8/5 on the coarse grain heat-affected zone of a Cr-Mo low-alloy steel pipe
| Autor: | Petrônio Zumpano Júnior, João da Cruz Payão Filho, Diogo de Oliveira Moraes, Victor Hugo Pereira Moraes e Oliveira, Paulo Henrique Grossi Dornelas, Francisco Werley Cipriano Farias |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Heat-affected zone Materials science Bainite Strategy and Management Alloy steel Metallurgy 02 engineering and technology Welding Management Science and Operations Research engineering.material 021001 nanoscience & nanotechnology Microstructure Indentation hardness Industrial and Manufacturing Engineering law.invention 020901 industrial engineering & automation law Ferrite (iron) Martensite engineering 0210 nano-technology |
| Zdroj: | Journal of Manufacturing Processes. 60:520-529 |
| ISSN: | 1526-6125 |
| DOI: | 10.1016/j.jmapro.2020.10.082 |
| Popis: | This work aimed to develop a microstructure-predicting methodology (MPM) using coupled physical-FEM-thermodynamic simulation to predict the influence of cooling time from 800 to 500 °C (t8/5 – 15, 30, 80, and 210 s) on the microstructure and mechanical behavior of the coarse grain heat-affected zone (CGHAZ) of a Cr-Mo low alloy steel welded joint. The MPM was experimentally validated. The MPM certainly predicted that the increase of t8/5 caused a remarkable change in CGHAZ microstructure (martensite and bainite to ferrite with aligned and non-aligned martensite-austenite-carbide M-A-C) and also decreases the Vickers microhardness. The MPM and experimental data show that the use of welding parameters that increases t8/5 (reducing the cooling rate) can jeopardize the welded joint behavior. Besides, the MPM proved to be a suitable tool for estimating the microstructure and microhardness of the CGHAZ. |
| Databáze: | OpenAIRE |
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