caa a22 4500 463229258 CHVBK 20180405153236.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-1115-3 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1115-3 Study of welding characteristics of 0.3C-CrMoV(ESR) ultrahigh strength steel [Elektronische Daten] [M. Suresh, P. Sinha, D. Sarma, N. Ballal, P. Krishna Rao] A new ultrahigh strength low alloy steel 0.3C-CrMoV(ESR), having an ultimate tensile strength and 0.2% proof strength of above 1,700 and 1,500MPa, respectively, in quenched and tempered condition, was developed primarily as a cost effective material for space launch vehicle applications. Welding is a major step in the fabrication of most of the pressure vessels, structures and equipments. Steels with carbon equivalent in excess of 0.40wt% show a tendency to form martensite on welding, and therefore are considered difficult to weld. 0.3C-CrMoV(ESR) steel has a carbon equivalent value of nearly 1.0 that classifies it as a ‘very difficult to weld' steel. In addition it has a niobium content of about 0.10% and a vanadium content of 0.25%. It is known that niobium content of more than 0.02wt% has a deleterious effect on the toughness properties of low carbon welds. It has also been reported that the effect of niobium on weld metal toughness is more deleterious in the presence of vanadium. Hence, in the present study, the properties of the weldment of this new steel under different heat treatment conditions (HT-1 and HT-2) have been studied. In HT-1 condition, the plates were welded in hardened and tempered condition and no further heat treatment was given after welding, while in HT-2 condition, the annealed plates were subjected to welding followed by hardening and tempering heat treatments. For HT-1 condition, only tensile properties were evaluated. The welded plates under HT-2 condition were evaluated for tensile properties, fracture toughness, residual strength and microstructure features. Springer Science+Business Media, LLC, 2007 Suresh M. Vikram Sarabhai Space Centre, Indian Space Research Organisation, 695 022, Trivandrum, Kerala, India aut Sinha P. Vikram Sarabhai Space Centre, Indian Space Research Organisation, 695 022, Trivandrum, Kerala, India aut Sarma D. Banaras Hindu University, Varanasi, India aut Ballal N. Indian Institute of Technology-Bombay, 400076, Mumbai, India aut Krishna Rao P. Indian Institute of Technology-Bombay, 400076, Mumbai, India aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5602-5612 0022-2461 42:14<5602 2007 42 10853 https://doi.org/10.1007/s10853-006-1115-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1115-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Suresh M. Vikram Sarabhai Space Centre, Indian Space Research Organisation, 695 022, Trivandrum, Kerala, India aut NATIONALLICENCE 700 1- Sinha P. Vikram Sarabhai Space Centre, Indian Space Research Organisation, 695 022, Trivandrum, Kerala, India aut NATIONALLICENCE 700 1- Sarma D. Banaras Hindu University, Varanasi, India aut NATIONALLICENCE 700 1- Ballal N. Indian Institute of Technology-Bombay, 400076, Mumbai, India aut NATIONALLICENCE 700 1- Krishna Rao P. Indian Institute of Technology-Bombay, 400076, Mumbai, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5602-5612 0022-2461 42:14<5602 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer