TY - JOUR A1 - Weber, Gert A1 - Xu, Ping T1 - Unification of Specimens and Test Procedures for Fatigue Testing of Joined Thin Sheet Metal Structures T2 - 55th International Conference Advanced Processes and Technologies in Welding and Allied Processes CY - Copenhagen, Denmark DA - 2002-06-24 PY - 2002 SN - 0043-2288 SN - 1878-6669 VL - 46 IS - III-1206-02 PB - Springer CY - Oxford AN - OPUS4-1445 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Xu, Ping A1 - Weber, Gert A1 - Böllinghaus, Thomas A1 - Krause, Hans-Joachim ED - Blom, A. F. T1 - Determination of relevant fatigue characteristics for joined thin sheet metal structures on suitable specimens with appropriate test methods T2 - 8th FATIGUE 2002 ; 8th International Fatigue Congress CY - Stockholm, Sweden DA - 2002-06-03 PY - 2002 SN - 1-901537-30-7 VL - 2 SP - 1103 EP - 1110 PB - EMAS, Engineering Materials Advisory Services CY - Cradley Heath, West Midlands AN - OPUS4-1385 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping A1 - Weber, Gert A1 - Böllinghaus, Thomas A1 - Krause, Hans-Joachim T1 - Determination of Relevant Fatigue Charcteristics for Joined Thin Sheet Metal Structures on Suitable Specimens with Appropriate Test Methods T2 - The 8th International Factigue Congress "FATIGUE 2002" CY - Stockholm, Sweden DA - 2002-06-01 PY - 2002 AN - OPUS4-7170 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Xu, Ping A1 - Böllinghaus, Thomas T1 - Fatigue testing for spot welds - problems, solutions and new development N2 - Engineering design of spot-welded components as well as computational analyses of the local stress in the weld zone require relevant fatigue test data. Those test data, however, are dependent on the applied specimens, on the specimen restraint, on the load introduction into the weld zone as well as on the definition of the specimen failure. The discussion of the advantages and drawbacks as well as of the influence of these factors shows that a deliberate selection of specimens is necessary for different test purposes. For the comparability of the test results it is essential in addition to specify comparable test conditions, e.g., specimen fixturing, load introduction and definition of the specimen failure. On account of the variety of variants, a standardization of suitable specimens and respective test conditions hence constitutes an approach to the determination of relevant and comparable test results. T2 - SAE world congress CY - Detroit, MI, USA DA - 2003-03-03 PY - 2003 UR - http://www.sae.org/technical/papers/2003-01-0976 SN - 0-7680-1191-4 SN - 0099-5908 N1 - Serientitel: SAE-SP – Series title: SAE-SP IS - 1766 SP - 87 EP - 94 PB - Society of Automotive Engineers CY - Warrendale, Pa. AN - OPUS4-2299 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping T1 - Fatigue Testing for Spot Welds - Problems, Solutions and New Development T2 - SEA World Congress CY - Detroit, MI, USA DA - 2003-03-03 PY - 2003 AN - OPUS4-4023 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping A1 - Weber, Gert A1 - Tischlinger, Wolfgang T1 - Extended Weldability Lobes in Resistance Spot Welding T2 - 56th Annual Assembly of IIW CY - Bucharest, Romania DA - 2003-07-06 PY - 2003 AN - OPUS4-4025 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Xu, Ping T1 - Determination of fatigue crack initiation and crack propagation at spot welded joints with high-precision thermometry KW - Fatigue testing KW - Spot welds KW - Thermometry KW - Crack initiation PY - 2004 SN - 0043-2288 SN - 1878-6669 VL - 48 IS - 11-12 SP - 14 EP - 17 PB - Springer CY - Oxford AN - OPUS4-6942 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping T1 - Simple but Effective - a Mechanical Methode to Improve the Fatigue Behaviour of Spot Welded High-Strength Steels N2 - Substantial improvement in the fatigue strength of spot welded high-strength steels has been achieved with the help of a mechanical method, i. e. preloading. Fatigue tests of preloaded tensile shear specimens made from the material H280LA have revealed that their S/N-curves, compared to those of non-preloaded specimens, are not only located at elevated positions, but have flatter slope, too. Low cycle fatigue tests of the triple-spot weld tensile shear specimens examined yielded an increase in fatigue strength of around 50 %. Due to preloading, the notch zones in the spot welded area undergo plastic deformation as a result of high notch stresses. After specimen unloading, compressive stresses arise in this area involving a beneficial specimen behaviour under the load imposed in subsequent fatigue testing, thus causing delayed crack initiation in the spot weld area. T2 - The 3rd International Seminar on Advances in Resistance Welding CY - Berlin, Germany DA - 2004-11-16 PY - 2004 AN - OPUS4-4750 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Xu, Ping T1 - Determination of fatige crack initiation and crack propagation on spot welded joints with highprecision thermometry T2 - 57th Annual Assembly of International Institute of Welding (IIW), Com. III CY - Osaka, Japan DA - 2004-07-15 PY - 2004 AN - OPUS4-4935 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - McInerney, T.-J. A1 - Madigan, R.B. A1 - Xu, Ping A1 - Cross, Carl Edward ED - Stan A. David, ED - Tarasankar DebRoy, ED - John C. Lippold, ED - Herschel B. Smartt, ED - John M. Vitek, T1 - Achieving grain refinement through weld pool oscillation T2 - 7th International Conference on Trends in Welding Research CY - Pine Mountain, GA, USA DA - 2005-05-16 KW - Aluminium Alloy KW - Grain Refinement KW - Weld Pool Oscillation KW - Frequency Amplitude Range KW - Alloy 2219 PY - 2006 SN - 978-0-87170-842-7 SP - 17 EP - 22 PB - ASM International CY - Materials Park, Ohio AN - OPUS4-18040 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Cross, Carl Edward A1 - Ben-Hamu, G. A1 - Eliezer, D. A1 - Xu, Ping ED - Kainer, K. U. T1 - Corrosion-fatigue of AZ31 wrought Magnesium weldments T2 - 7th International conference on magnesium alloys and their applications CY - Dresden, Germany DA - 2006-09-06 KW - AZ31 Magnesium Alloy KW - Arc Weld KW - Corrosion Fatigue KW - Salt Water PY - 2008 SN - 978-3-527-31764-6 SP - 727 EP - 733 PB - Wiley-VCH AN - OPUS4-18313 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Winzer, Nicholas A1 - Xu, Ping A1 - Bender, S. A1 - Gross, Thomas A1 - Unger, Wolfgang A1 - Cross, Carl Edward T1 - Stress corrosion cracking of gas-tungsten arc welds in continuous-cast AZ31 Mg alloy sheet N2 - AZ31 Mg alloy sheet was welded using a gas-tungsten arc (GTA) process over inserts containing 2.3-9.3 wt.% Al. The welded specimens were susceptible to SCC in distilled water, with susceptibility increasing with decreasing weld metal Al (or β particle) concentration. Primary stress corrosion cracks initiated at the weld metal-HAZ interface by stress-assisted localised dissolution and propagated through the weld and base metals by transgranular and intergranular H-assisted fracture (TG-HAF and IG-HAF) respectively. The IG fracture mode may be intrinsic to the texture imparted upon the base metal by rolling. The increase in SCC susceptibility with decreasing weld metal Al concentration is contrary to the purported roles of β particles in promoting localised corrosion and as crack nucleation sites, but corresponds with increases in weld - base metal galvanic current density and weld metal localised corrosion susceptibility. KW - C. Stress corrosion KW - C. Hydrogen embrittlement KW - A. Magnesium KW - C. Welding PY - 2009 DO - https://doi.org/10.1016/j.corsci.2009.05.037 SN - 0010-938X VL - 51 IS - 9 SP - 1950 EP - 1963 PB - Elsevier CY - Orlando, Fla. AN - OPUS4-20049 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Xu, Ping A1 - Winzer, N. A1 - Bender, S. A1 - Cross, C.E. ED - Kainer, K.U. T1 - Investigation of corrosion-fatigue behavior of AZ31 wrought magnesium weldments T2 - Magnesium - 8th International conference on magnesium alloys and their applications CY - Weimar, Germany DA - 2009-10-26 KW - Corrosion-fatigue KW - Magnesium KW - Welds PY - 2009 SN - 978-3-527-32732-4 SP - 858 EP - 865 PB - Wiley-VCH AN - OPUS4-20589 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kromm, Arne A1 - Schasse, R. A1 - Xu, Ping A1 - Mente, Tobias A1 - Kannengießer, Thomas ED - Olden, T.-M. ED - Muransky, O. ED - Edwards, L. T1 - Influence of weld repair by gouging on the residual stresses in high strength steels N2 - Carbon arc-air gouging is a common technology when repairing defects in welded structures. Often this technique is applied in repeated cycles even on the same location of the joint. Due to the multiple heat input by gouging and subsequent re-welding, the residual stresses are strongly influenced. This can become crucial when microstructure and mechanical properties are adversely affected by multiple weld reparations. Knowledge about the relation of gouging and residual stresses is scarce but important when high strength steels, which are sensitive to residual stresses, are processed. The present study shows the effect of repair welding on a high strength steel structural element. The weld and the heat affected zone were subjected to multiple thermal cycles by gouging and subsequent repair welding. The residual stresses were determined by X-ray diffraction at different positions along the joint. The results showed that the residual stress level has increased by the repair cycles. This is most pronounced for the heat affected zone. Adapted welding procedures may prevent detrimental residual stress distributions. T2 - ICRS 2016 - 10th International Conference on Residual Stresses CY - Sydney, Australia DA - 03.07.2016 KW - Repair welding KW - Weld residual stress KW - Carbon arc-air gouging PY - 2016 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-389242 SN - 978-1-94529117-6 SN - 978-1-94529117-3 DO - https://doi.org/10.21741/9781945291173-29 SN - 2474-395X VL - 2 SP - 169 EP - 174 PB - Materials Research Forum LLC CY - Millersville, PA, USA AN - OPUS4-38924 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -