TY - CONF A1 - Cross, Carl Edward A1 - Eliezer, Dan A1 - Böllinghaus, Thomas T1 - The Role of Hydrogen in Titanium Alloy Weldments T2 - Titanium Conference 2006 CY - San Diego, CA, USA DA - 2006-10-01 PY - 2006 VL - 22 SP - 1 EP - 9 CY - San Diego AN - OPUS4-14488 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Eliezer, Dan A1 - Hamu, G.B. A1 - Cross, Carl Edward A1 - Böllinghaus, Thomas ED - Galloway, T. T1 - Effect of grain refinement on the strength and corrosion of AZ31 magnesium alloy following severe plastic deformation N2 - Gas tungsten arc welds made on wrought magnesium AZ31 plate have been characterized for corrosion in saline solution (3.5% NaCl). Microstructural changes induced by the welding process resulted in different environmental behaviour of each zone (BM-base metal, HAZ-heat affected zone and FZ-fusion zone). The faster kinetics of corrosion in FZ and especially HAZ are attributed to (a) the coarse microstructure, consisting of large grains, and (b) very small amounts of ß-phase in the grain boundaries. Also, hardness traverses have shown that these zones are weaker than the base metal. Based on the significant effect of grain size on strength in magnesium alloys, the weld metal grains have been systematically refined using controlled oscillation during welding, and by adding a grain refiner to the weld pool. Detailed microstructure analyses have been carried out and the relationships between corrosion behaviour, mechanical properties and microstructure (grain refinement and second-phases formation) are highlighted. T2 - 135th Annual Meeting of the Minerals, Metals & Materials Society CY - San Antonio, TX, USA DA - 2006-03-12 PY - 2006 SN - 978-0-87339-619-6 VL - 135 SP - 1 EP - 4 PB - TMS, the Minerals, Metals & Materials Society CY - Warrendale AN - OPUS4-14452 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Eliezer, Dan A1 - Tal-Gutelmacher, E. A1 - Cross, Carl Edward A1 - Böllinghaus, Thomas T1 - Hydrogen trapping in beta-21S titanium alloy N2 - Different characteristics of hydrogen's absorption/desorption behavior and trapping in ß-21S titanium alloy are studied by means of thermal desorption spectroscopy (TDS). Spectra analysis is supported by data from variety of other experimental techniques, such as LECO hydrogen determinator, XRD and microstructure investigations by means of optic and electronic microscopy. In contrast to many past considerations, the complex process of hydrogen evolution has been found to be significantly affected by the way hydrogen introduction into the alloy. The different trapping sites, as well as phase transformations, have to be considered as the reasons for the different hydrogen evolution behavior. KW - Titanium alloys KW - Hydrogen absorption KW - Hydrogen desorption KW - Thermally activated processes KW - Thermal desorption spectroscopy (TDS) PY - 2006 DO - https://doi.org/10.1016/j.msea.2006.01.067 SN - 0921-5093 SN - 1873-4936 VL - 421 IS - 1-2 SP - 200 EP - 207 PB - Elsevier CY - Amsterdam AN - OPUS4-14423 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eliezer, Dan A1 - Tal-Gutelmacher, E. A1 - Kannengießer, Thomas A1 - Cross, Carl Edward A1 - Böllinghaus, Thomas T1 - The effects of high fugacity and internal hydrogen on beta-21S titanium alloy T2 - EUROCORR 2005 CY - Lisbon, Portugal DA - 2005-09-04 KW - Titanium alloys KW - Beta-21S KW - Hydrogen desorption KW - Thermal Desorption Spectroscopy (TDS) PY - 2005 SP - 1 EP - 9 PB - Fundação para a Ciência e a Tecnologia CY - Lisbon AN - OPUS4-14451 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Ben-Hamu, G. A1 - Eliezer, Dan A1 - Cross, Carl Edward A1 - Böllinghaus, Thomas T1 - Microstructure and Corrosion Resistance of TIG Welded AZ31B Magnesium Sheet T2 - 2nd International Conference on Magnesium CY - Beijing, China DA - 2006-06-25 KW - AZ31B KW - TIG welded KW - Microstructure KW - Corrosion behavior PY - 2006 VL - 2 IS - A-044 SP - 1 EP - 8 CY - Beijing AN - OPUS4-14486 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Eliezer, Dan A1 - Tal-Gutelmacher, E. A1 - Cross, Carl Edward A1 - Böllinghaus, Thomas T1 - Hydrogen absorption and desorption in a duplex-annealed Ti-6Al-4V alloy during exposure to different hydrogen-containing environments N2 - Based on its excellent combination of a high strength/weight ratio and good corrosion behavior, Ti–6Al–4V alloy is ranked among the most important advanced materials for a variety of industrial applications. However, in many of these technological applications, this alloy is exposed to environments which can act as sources of hydrogen, and severe problems may arise based on its susceptibility to hydrogen embrittlement. Even small hydrogen concentrations might lead to failure. Consequently, a comprehensive knowledge of hydrogen's absorption/desorption behavior and interactions between hydrogen and different microstructural features is necessary to better understand the desorption and trapping mechanisms, the types of the trap sites, and the trapped hydrogen content, in order to determine the safe service conditions of this alloy in the industry. In this paper, different characteristics of hydrogen's absorption/desorption behavior and trapping in a duplex-annealed Ti–6Al–4V alloy are studied by means of thermal desorption spectroscopy (TDS). Spectra analysis is supported by data from a variety of other experimental techniques, such as LECO hydrogen determinator, XRD and microstructure investigations by means of optical and electron microscopy. Hydrogen evolution is found to be a very complex process, being affected by the way hydrogen was initially introduced to the alloy, the phase transformations that may occur during the thermal analysis and the presence of potential trapping sites. KW - Titanium alloys KW - Hydrogen absorption KW - Hydrogen desorption KW - Ti-6Al-4V KW - Thermal desorption spectroscopy (TDS) PY - 2006 DO - https://doi.org/10.1016/j.msea.2006.06.088 SN - 0921-5093 SN - 1873-4936 VL - 433 IS - 1-2 SP - 298 EP - 304 PB - Elsevier CY - Amsterdam AN - OPUS4-14484 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eliezer, Dan A1 - Tal-Gutelmacher, E. A1 - Cross, Carl Edward A1 - Böllinghaus, Thomas ED - Gdoutos, E. T1 - Irreversible Hydrogen Trapping in Welded Beta-21S Titanium Alloy T2 - 16th European Conference of Fracture CY - Alexandroupoli, Greece DA - 2006-07-03 KW - Titanium alloys KW - Beta-21S KW - Hydrogen desorption KW - Thermal Desorption Spectroscopy (TDS) PY - 2006 VL - 16 IS - 803 SP - 1 EP - 8 CY - Alexandroupolis AN - OPUS4-14453 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -