Weldability of class 2 armor steel using gaz tungsten arc welding

• Autorzy: Akca C. , Karaaslan A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this study, microstructural and mechanical evaluations of class 2 armor steel after single-pass and pre-heated/single-pass welding were investigated to reveal the effect of pre-heating on heat affected zone (HAZ) in thin armor steel parts. Design/methodology/approach: In this research, class 2 armor steel parts were welded using single-pass and pre-heated/single-pass conditions to examine optimal welding parameters in relatively thin parts. Welded specimens were investigated using optical microscopy and Vickers hardness tests. Optical micrography was used to characterise transition sites of base metal, HAZ and weld zone. Hardness test was conducted to characterise homogeneity of welding in terms of mechanical properties. Findings: The results have shown that pre-heat/single-pass welding of armor steel could provide homogeneous hardness distribution along welding region. Similar microstructures and mechanical properties were found in base metal and HAZ. Practical implications: Armor steel was succesfully welded using GTAW without any defects either in weld seam or HAZ. Originality/value: Weldability of class 2 armor steel using gas tungsten acr welding was investigated.

Słowa kluczowe

EN

gas tungsten arc welding; welding parameters optimization; microstructure; hardness test

PL

spawanie GTA; stal pancerna; mikrostruktura; badania twardości

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 34, nr 2
• Strony: 110--112
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Akca C.

autor

Karaaslan A.

• Department of Metallurgical and Materials Engineering, Yildiz Technical University, Davutpasa Kampüsü, 34210 Esenler, Istanbul, Turkey,

Bibliografia

• [1] C. Akca, A. Karaaslan, Microstructural and impact considerations of heat affected zone in gas tungsten arc welding of armor steel, Practical Metallography (2008) (in press).
• [2] ASM Metals Handbook, vol. 6, American Society for Metals, Ohio, 1914.
• [3] M.R. Edwards, A. Mathewson, The ballistic properties of tool steel as a potential improvised armor plate, International Journal of Impact Engineering 19/4 (1997) 297-309.
• [4] Federation of American Scientists (FAS), Military Analysis Network Report, Washington D.C.
• [5] K. Maweja, W. Stumpf, Fracture and ballistic-induced phase transformation in tempered martensitic low-carbon armour steels, Materials Science and Engineering A 432 (2006) 158-169.
• [6] MIL-A-11356F, 1987, Military Specification: Armor, Steel, Cast, Homogeneous, Combat-Vehicle Type.
• [7] S.L. Phoenix, P.K. Porwal, A new membrane model for the ballistic impact response and V50 performance of multiply fibrous systems, International Journal of Solids and Structures 40 (2003) 6723-6765.
• [8] B. Srivathsa, N. Ramakrishnan, Ballistic performance maps for thick metallic armour, Journal of Materials Processing Technology 96 (1999) 81-91.
• [9] D.Q. Sun, X.Y. Gu, W.H. Liu, Z.Z. Xuan, Welding consumable research for austempered ductile iron (ADI), Materials Science and Engineering A 402 (2005) 9-15.