Development and design of microstructure based coated electrode for ballistic performance of shielded metal arc welded armour steel joints
| Autor: | Goutam Das, Tapan Kumar Pal, A K Pramanick, Subrata Nandy, Hrishikesh Das, M Ghosh, G M Reddy |
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| Rok vydání: | 2016 |
| Předmět: |
Toughness
Materials science Armour Bainite Shielded metal arc welding 02 engineering and technology Welding engineering.material 01 natural sciences law.invention law 0103 physical sciences lcsh:TA401-492 General Materials Science Austenitic stainless steel Composite material 010302 applied physics Austenite Mechanical Engineering Metallurgy 021001 nanoscience & nanotechnology Microstructure Mechanics of Materials engineering lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology |
| Zdroj: | Materials & Design, Vol 103, Iss, Pp 52-62 (2016) |
| ISSN: | 0264-1275 |
| Popis: | Joining of high strength armour steel plate developed for lighter armour vehicles using both austenitic and ferritic type of electrode/filler wire could show inferior ballistic performance of the welds. Combination of hard facing electrode and softer Austenitic Stainless Steel electrodes, though provided improved ballistic performance, might not satisfy main design criteria such as strength and toughness due to non-homogeneous microstructure of weld metal. In order to satisfy improved ballistic performance as well as other design parameters, it is highly desirable to develop coated electrode which will attribute more homogeneous microstructure in weld metal similar to high strength armour steel plate.The present investigation has attempted to obtain martensite, bainite and some amount of retained austenite in the weld metal by proper design of alloying elements in the coating of SMAW electrode based on metallurgical index. Three different electrodes attributing different combination of microstructural constituents in armour steel weld metals exhibited excellent ballistic performance combined with other design criteria such as strength and toughness at −40°C. However, among the different microstructural constituents lower bainite along with retained austenite showing maximum toughness both at room temperature and at −40°C could be considered as most desirable microstructure in armour steel weld metal. Keywords: Developed coated electrode, SMAW, Microstructure, Ballistic performance and mechanical properties |
| Databáze: | OpenAIRE |
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