Weldability testing of microalloyed steel and integrity assessment of welded joint
Апстракт
The results of weldability assessment of high strength low carbon microalloyed steel are presented. These results are used for integrity assessment of weldments. Two aspects of behaviour were considered. These are the risk of cracking during manufacturing and the risk of brittle fracture due to weld joints susceptibility. The experiments were performed on thermo - mechanically control processed steel (TMCP), high strength low carbon steel, microalloyed with Ti and Nb. Welded joints were performed by Shield Metal Arc Welding (SMAW) welding process. Weldability assessment included the tests of mechanical and structural properties of welded joints, welded joint susceptibility to hot (FISCO test), cold cracking (Control Thermal Severity - CTS test), reheat cracks (Tanaka-test) and to lamellar tearing (Windows test), as well as the susceptibility test to ductile-to-brittle transition behaviour of welded joint and its constituents. Since considered steel is of high strength, special attentio...n is paid to fracture mechanics methods testing of welded joint behaviour in the presence of a crack-like defect. Standard Test Method for Crack-Tip Opening Displacement, - CTOD i.e. δ c for maximal load, is used in the analysis of stable crack growth. Transition temperatures, i.e. 50% Charpy impact energy and drop weight test for nil ductility temperature (NOT) were used for determination of behaviour related to brittle fracture. Test results have shown that welded joints obtained by specified welding technology, are of satisfactory quality regarding mechanical properties, but also regarding crack initiation and growth. The benefit of using that approach for integrity assessment of high strength steels weldment can be expressed in reduced wall thickness, followed by significant reduction in welded joint cross-sections, welding consumables consumption and time necessary to produce welded joints.
Кључне речи:
Weldability / Transition temperatures / Microalloyed steels / Hot cracks / Fracture mechanics / Cracking / Crack resistance of weldments / Cold crackИзвор:
Welding in the World, 2005, 49, 9 SPEC. ISS., 464-477Издавач:
- Institut International de la Soudure
Институција/група
Inovacioni centarTY - CONF AU - Grabulov, Vencislav AU - Odanović, Zoran AU - Sedmak, Aleksandar AU - Ćirić, R. AU - Antić, M. PY - 2005 UR - https://machinery.mas.bg.ac.rs/handle/123456789/480 AB - The results of weldability assessment of high strength low carbon microalloyed steel are presented. These results are used for integrity assessment of weldments. Two aspects of behaviour were considered. These are the risk of cracking during manufacturing and the risk of brittle fracture due to weld joints susceptibility. The experiments were performed on thermo - mechanically control processed steel (TMCP), high strength low carbon steel, microalloyed with Ti and Nb. Welded joints were performed by Shield Metal Arc Welding (SMAW) welding process. Weldability assessment included the tests of mechanical and structural properties of welded joints, welded joint susceptibility to hot (FISCO test), cold cracking (Control Thermal Severity - CTS test), reheat cracks (Tanaka-test) and to lamellar tearing (Windows test), as well as the susceptibility test to ductile-to-brittle transition behaviour of welded joint and its constituents. Since considered steel is of high strength, special attention is paid to fracture mechanics methods testing of welded joint behaviour in the presence of a crack-like defect. Standard Test Method for Crack-Tip Opening Displacement, - CTOD i.e. δ c for maximal load, is used in the analysis of stable crack growth. Transition temperatures, i.e. 50% Charpy impact energy and drop weight test for nil ductility temperature (NOT) were used for determination of behaviour related to brittle fracture. Test results have shown that welded joints obtained by specified welding technology, are of satisfactory quality regarding mechanical properties, but also regarding crack initiation and growth. The benefit of using that approach for integrity assessment of high strength steels weldment can be expressed in reduced wall thickness, followed by significant reduction in welded joint cross-sections, welding consumables consumption and time necessary to produce welded joints. PB - Institut International de la Soudure C3 - Welding in the World T1 - Weldability testing of microalloyed steel and integrity assessment of welded joint EP - 477 IS - 9 SPEC. ISS. SP - 464 VL - 49 UR - https://hdl.handle.net/21.15107/rcub_machinery_480 ER -
@conference{ author = "Grabulov, Vencislav and Odanović, Zoran and Sedmak, Aleksandar and Ćirić, R. and Antić, M.", year = "2005", abstract = "The results of weldability assessment of high strength low carbon microalloyed steel are presented. These results are used for integrity assessment of weldments. Two aspects of behaviour were considered. These are the risk of cracking during manufacturing and the risk of brittle fracture due to weld joints susceptibility. The experiments were performed on thermo - mechanically control processed steel (TMCP), high strength low carbon steel, microalloyed with Ti and Nb. Welded joints were performed by Shield Metal Arc Welding (SMAW) welding process. Weldability assessment included the tests of mechanical and structural properties of welded joints, welded joint susceptibility to hot (FISCO test), cold cracking (Control Thermal Severity - CTS test), reheat cracks (Tanaka-test) and to lamellar tearing (Windows test), as well as the susceptibility test to ductile-to-brittle transition behaviour of welded joint and its constituents. Since considered steel is of high strength, special attention is paid to fracture mechanics methods testing of welded joint behaviour in the presence of a crack-like defect. Standard Test Method for Crack-Tip Opening Displacement, - CTOD i.e. δ c for maximal load, is used in the analysis of stable crack growth. Transition temperatures, i.e. 50% Charpy impact energy and drop weight test for nil ductility temperature (NOT) were used for determination of behaviour related to brittle fracture. Test results have shown that welded joints obtained by specified welding technology, are of satisfactory quality regarding mechanical properties, but also regarding crack initiation and growth. The benefit of using that approach for integrity assessment of high strength steels weldment can be expressed in reduced wall thickness, followed by significant reduction in welded joint cross-sections, welding consumables consumption and time necessary to produce welded joints.", publisher = "Institut International de la Soudure", journal = "Welding in the World", title = "Weldability testing of microalloyed steel and integrity assessment of welded joint", pages = "477-464", number = "9 SPEC. ISS.", volume = "49", url = "https://hdl.handle.net/21.15107/rcub_machinery_480" }
Grabulov, V., Odanović, Z., Sedmak, A., Ćirić, R.,& Antić, M.. (2005). Weldability testing of microalloyed steel and integrity assessment of welded joint. in Welding in the World Institut International de la Soudure., 49(9 SPEC. ISS.), 464-477. https://hdl.handle.net/21.15107/rcub_machinery_480
Grabulov V, Odanović Z, Sedmak A, Ćirić R, Antić M. Weldability testing of microalloyed steel and integrity assessment of welded joint. in Welding in the World. 2005;49(9 SPEC. ISS.):464-477. https://hdl.handle.net/21.15107/rcub_machinery_480 .
Grabulov, Vencislav, Odanović, Zoran, Sedmak, Aleksandar, Ćirić, R., Antić, M., "Weldability testing of microalloyed steel and integrity assessment of welded joint" in Welding in the World, 49, no. 9 SPEC. ISS. (2005):464-477, https://hdl.handle.net/21.15107/rcub_machinery_480 .