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"Digital image correlation study on tensile properties of high strength" by Lihong Su, Zhenyu Fei et al.

The aim of this investigation was to compare the strength, ductility and strain distribution during tensile testing of High Hardness Armour (HHA) and Rolled Homogenous Armour (RHA) in a welded configuration, using a range of different welding procedures. Gas metal arc welding (GMAW) using austenitic filler, GMAW using ferritic filler and Keyhole-Tungsten Inert Gas (K-TIG) were investigated. The results of cross weld joint tensile tests exhibited both lower strength and lower ductility compared to the base metals. Among the three welding techniques, K-TIG resulted in the highest weld metal hardness, the highest strength and the largest ductility. GMAW using an austenitic filler resulted in the lowest strength and the smallest ductility. Digital image correlation (DIC) observation revealed strain localisation within the weld metal for specimens welded by GMAW using the austenitic filler. For specimens welded by GMAW using ferritic filler, the strain localisation occurred within the weld ....

High Hardness Armour , Rolled Homogenous Armour , Keyhole Tungsten Inert Gas , Digital Image Correlation , K Tig , Uenched And Tempered Steel ,