TY - CONF A1 - Kannengießer, Thomas A1 - Böllinghaus, Thomas A1 - Zimmer, Peter T1 - Investigations of cold cracking by the CTS-Test at various cooling conditions N2 - Numerous national and international activities of regulation and standardization of cold cracking tests are currently being undertaken. Most of these test procedures operate as crack-no-crack tests and are focussed on the determination of technological parameters, as for instance the welding conditions and the heat input as well as pre- and postheating temperature and times. Such parameters predominantly influence the cooling conditions of the weld, which significantly affect the three well known local parameters on hydrogen cracking microstructure, hydrogen concentration and mechanical load. As one of the test procedures, the CTS-Test is currently standardized in the draft standard prEN ISO17642 which has been prepared on the European level by CEN/TC 121/WG 13 (destructive tests on welds). As compared to other cold cracking tests, quite extensive specimen cooling procedures are prescribed for the CTS-Test. As a contribution to the ongoing discussion the present document highlights the effect of different cooling procedures after welding propagated for the modified CTS-Test. The major part of the work includes a comparison of experimentally determined cooling curves at specific weld locations with respective thermal finite element analyses. As a result, it turned out that the prescribed water cooling after welding does not alter the microstructure relevant cooling time Δt(8/5) and the cold cracking relevant cooling time Δt(3/1) as compared to simple air cooling. With increasing preheating temperature the effect of water cooling becomes more pronounced on the cooling time Δt(3/1), but still does not affect the cooling time Δt(8/5). The effects of rapid cooling of the CTS specimens after welding have thus to be reconsidered, in particular, with respect to its transferability to component welds and to additional non-realistic quenching effects. T2 - 56th IIW Annual Assembly - International Conference on Welded Construction for Urban Infrastructure CY - Bucharest, Romania DA - 10.07.2003 KW - Kaltrisstests KW - Schweißsicherheit PY - 2003 SP - 1 EP - 12 PB - International Institute of Welding CY - Roissy AN - OPUS4-2630 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zimmer, Peter T1 - Sicherheot geschweißter Bauteile gegen wasserstoffbeinflusste Rissbildung T2 - Seminarveranstaltung "Gütesicherung" des DVS Bezirksverbandes Ostwestfalen-Lippe CY - Bielefeld, Germany DA - 2003-06-06 PY - 2003 AN - OPUS4-4022 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -