Mechanical & Microstructural Analysys Of Armor Steel Welded Joints
Abstract
One of the main
construction materials used in armor vehicles is Mil-A 46100 Armor Steel. The
importance of the material arises from its mechanical properties such as
hardness and explosive protection capability. MIG (Metal Inert Gas) welding technique is principally
based on welding metals via electric arc where the arc is continous between
metals and welding wire. In case welded metals are steel based materials, O2
and CO2 are added in portective gases in order to prevent
unexpected welding defects. In MIG welding applications, the amount of ferrit
in the chemical structure of the armor steel may result in some unexpected
affects due to its decreasing characteristic on ductility and toughness. The
welding wires used in MIG operations may exibit different fracture
characteristics; as some specimen show ductile fracture characteristics, the
rest may show brittle. Charpy Impact Test is one of the effective tests to
determine the impact energy and the fracture times of welded metals. In this
study, it is aimed to determine the relations between micro-structural results
and fracture times of the welded parts of Mil-A 46100 steels via MIG
applications.
Keywords
References
- A.K. Pramanick, H. Das, G.M. Reddy, M. Ghosh, G. Das, S. Nandye, T.K. Pal (2016) Materials and Design, Development and design of microstructure based coated electrode for ballistic performance of shielded metal arc welded armour steel joints, 103 (2016) 52–62 C. Sharma, V. Upadhyay, D. K. Dwivedi, P. Kumar, Mechanical properties of friction stir welded armor grade Al−Zn−Mg alloy joints, Trans. Nonferrous Met. Soc. China 27(2017) 493−506
- Çağrı Çelik, Kaynak kongresi IX. Ulusal kongre ve sergisi bildiriler kitabı zırh çeliklerin kaynağında kaynak ağzı geometrisi ve ilave tel optimizasyonu, (Pg.89-94),
- David Mazuera Robledo, John Alberto Suárez Gómez , Jorge Enrique Giraldo Barrada (2011) Dyna, ano 78, Development Of A Welding Procedure For Mil A 46100 Armor Steel Joints Using Gas Metal Arc Welding, Nro. 168, pp. 65-71. Medellín, Agust, 2011. ISSN 0012-7353,
- Furkan Sarsilmaz, Ihsan Kirik, Serkan Batı (2017) Journal of Manufacturing Processes, Microstructure and mechanical properties of armor 500/AISI2205steel joint by friction welding, 28 (2017) 131–136
- G. Magudeeswaran, V. Balasubramanian, G. Madhusudhan Reddy (2014) Defence Technology, Effect of welding processes and consumables on fatigue crack growth behaviour of armour grade quenched and tempered steel joints, 10 (2014) 47-59
- Hao Wang, Shanhua Xu, Youde Wang, Anbang Li, Effect of pitting degradation on ductile fracture initiation of steel butt-welded joints, Journal of Constructional Steel Research 148 (2018) 436–449
- Hongchao Guo, Jinhuai Wan, Yunhe Liu, Jiping Hao, Experimental study on fatigue performance of high strength steel welded joints, Thin-Walled Structures 131 (2018) 45–54
- Igor Barényi, Ondrej Híreš, Peter Lipták (2011), International Conference Of Scientific Paper, Degradation Of Mechanical Properties Of Armoured Steels After Its Weldıng, AFASES 2011, Brasov, 26-28 May 2011
- J.Carrier, Markiewicz, Haugou, Lebaillif, Leconte, Naceur, (2017) Influence of the heat affected zone on the dynamic behavior of a welded joint of armoured steel, International Journal of Impact Engineering 104 (2017) 154-163
- Kraft, J. M., Correlation of plane strain toughness with strain-hardening characteristics of a low, medium, and a highstrength steel. Applied Materials Research 3, (1964)