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Öğe Adhesive weld bonding of interstitial free steel at spot welding for automotive application(Redakcia Kovove Materialy, 2010) Hayat, F.; Demir, B.; Acarer, M.; Aslanlar, S.In this study, the effect of adhesive bonding on strength and strength-ductility behaviour of welding joint in electrical resistance spot welding of 7315 grade IF steel sheets was investigated. 7315 grade (DIN EN 10130-1999) IF steels were adhesively bonded and different welding current and welding cycle conditions were performed in welding process. For adhesive bonding, Loctite Terostat 9120-Grey and Terostat 9220-Black grade adhesive bonders were used. Additionally, adhesively bonded joint samples were also performed without welding. Microstructure and tensile-shear tests of the adhesively bonded and welded materials were evaluated. Failure modes of the weld bonded tensile sheared samples were observed to be different from only welded samples. Experimental results have shown that with the increase in the weld time and weld current, the effect of the adhesive weld bonding on tensile performance also increases.Öğe Effect of weld time and weld current on the mechanical properties of resistance spot welded IF (DIN EN 10130-1999) steel(Redakcia Kovove Materialy, 2009) Hayat, F.; Demir, B.; Acarer, M.; Aslanlar, S.In this study, the effects of weld current and weld time on the tensile peel strength and tensile-shear strength of 7114 grade IF (Interstitial Free) steel sheets joined by spot welding were investigated. Weld processes were performed by using 3, 5, 7, 9 kA weld current and 5, 10, 15, 20, 25, 30 weld cycles. The microstructure of the welded materials was evaluated. The hardness profiles were also determined. Experimental results showed that tensile shear loading bearing capacity and hardness of both weld and heat affected zones increased for increasing weld time and weld current. Weld nugget diameter extended by increasing weld time or/and weld current, so tensile shear load bearing capacity and tensile peel strength increased. Tensile fracture behaviour of the samples was evaluated. Weld lobe was constructed with respect to weld current and time.Öğe Effect of weld time and weld current on the mechanical properties of resistance spot welded IF (din en 10130-1999) steel(2009) Hayat, F.; Demir, B.; Acarer, M.; Aslanlar, S.In this study, the effects of weld current and weld time on the tensile peel strength and tensile-shear strength of 7114 grade IF (Interstitial Free) steel sheets joined by spot welding were investigated. Weld processes were performed by using 3, 5, 7, 9 kA weld current and 5, 10, 15, 20, 25, 30 weld cycles. The microstructure of the welded materials was evaluated. The hardness profiles were also determined. Experimental results showed that tensile shear loading bearing capacity and hardness of both weld and heat affected zones increased for increasing weld time and weld current. Weld nugget diameter extended by increasing weld time or/and weld current, so tensile shear load bearing capacity and tensile peel strength increased. Tensile fracture behaviour of the samples was evaluated. Weld lobe was constructed with respect to weld current and time.
