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| 1 | Mechanical properties of 2024-T4 aluminium alloy joints in ultrasonic vibration enhanced friction stir welding显示文摘 | 刘小超 武传松 Michael Rethmeier Andreas Pittner | 2013 | China Welding2013，22，4： | 9 |
| 2 | Fluid Flow Simulation of the Influence of a Steady Magnetic Field on the Weld Pool Dynamics in Deep Penetration Laser Beam Welding of Aluminum显示文摘A multi-physics numerical model was developed to investigate the influence of a steady magnetic field during partial penetration keyhole laser beam welding of an aluminum plate in flat position.Three-dimensional heat transfer,fluid dynamics including phase transition and electromagnetic field partial differential equations were solved with the finite element differential equation solver COMSOL Multiphysics.The magnetic field was aligned perpendicularly to the welding direction.The main objective of these simulations was to estimate the critical value of the magnetic field needed to suppress convective flows in the weld pool during high-power(up to 20 kW)laser beam welding of aluminum alloys with up to 20 mm deep weld pool.It reveals that steady magnetic fields with corresponding Hartmann numbers Ha2-10~4based on the half-width of the weld pool can effectively suppress convective flows in the weld pool.Moreover,the typically occurring wineglass-shape of the weld cross section caused by thermo-capillary flow is weakened. | BACHMANN Marcel AVILOV Vjaceslav GUMENYUK Andrey RETHMEIER Michael | 2012 | Journal of Iron and Steel Research(International)2012，19，S1： | 3 |
| 3 | Numerical simulation of full-penetration laser beam welding of thick aluminium plates with inductive support显示文摘 | Marcel Bachmann Vjaceslav Avilov Andrey Gumenyuk Michael Rethmeier | 2012 | Journal of Physics D: Applied Physics2012，，3： | 2 |
| 4 | Welding Thick Steel Plates with Fibre Lasers and GMAW显示文摘 | Frank Vollertsen Stefan Grünenwald Michael Rethmeier Andrey Gumenyuk Uwe Reisgen Simon Olschok | 2010 | Welding in the World2010，，3： | 1 |
| 5 | Laserhybrid welding of thick plates up to 32 mm using a 20 kW fiber laser显示文摘 | RETHMEIER MICHAEL GOOK SERGEJ GUMENYUK ANDREY | 2009 | Quarterly Journal of the Japan Welding Society2009，27，2： | 1 |
| 6 | About the influence of a steady magnetic field on weld pool dynamics in partial penetration high power laser beam welding of thick aluminium parts显示文摘 | Marcel Bachmann Vjaceslav Avilov Andrey Gumenyuk Michael Rethmeier | 2013 | International Journal of Heat and Mass Transfer2013，，： | 1 |
| 7 | Simulation of welding显示文摘 | Chuan-Song WU Michael RETHMEIER Christopher SCHWENK | 2011 | Frontiers of Materials Science2011，5，2： | 0 |
| 8 | 镍基超级合金的电子束焊接显示文摘增材制造技术是制造和修复高强度材料复杂零部件的理想工艺技术,但缺少避免热裂纹的焊接工艺方案,而电子束焊接技术可以改变这种局面。在包括镍基耐高温合金在内的高强度材料零件生产中,尤其是在结构复杂零件的生产中,增材制造技术有着非常强大的的应用潜力。然而在灵活的增材制造过程中,却缺少了这些零部件可靠的连接工艺技术。镍基合金零部件所面临的最大挑战是避免热裂。电子束焊接技术就是增材制造零部件可靠连接的解决方案。多年来,镍基合金已经在许多工业领域中得到了广泛的应用。 | Julius Raute Max Biegler Michael Rethmeier | 2023 | 现代制造2023，，10： | 0 |
| 9 | Microcrack Formation During Gas Metal Arc Welding of High-Strength Fine-Grained Structural Steel显示文摘The recent development of high-performance-modified spray arc processes in gas metal arc welding due to modern digital control technology and inverter power sources enables a focused spray arc,which results in higher penetration depths and welding speed.However,microcracks occurred in the weld metal while approaching the process limits of the modified spray arc,represented by a 20-mm double layer DV-groove butt-weld.These cracks were detected in structural steel exhibiting a yield strength level of up to 960 MPa and are neither dependent on the used weld power source nor a consequence of the modified spray arc process itself.The metallographic and fractographic investigations of the rather exceptional fracture surface lead to the classification of the microcracks as hot cracks.The effects of certain welding parameters on the crack probability are clarified using a statistical design of experiment.However,these microcracks do not impact the design specification for toughness in the Charpy V-notch test(absorbed energy at —40 ℃ for the present material is 30 J). | Christoph Heinze Thomas Michael Andreas Pittner Michael Rethmeier | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，1： | 0 |
| 10 | Simulation of an Inductive Weld Pool Support for Deep Penetration Laser Beam Welding of Metal Parts显示文摘A three-dimensional laminar steady state numerical model was used to investigate_the influence of an alternating current(ac)magnetic field during single pass high power laser beam keyhole welding of 20 mm thick aluminum.The three-dimensional heat transfer,fluid dynamics and electromagnetic field equations were solved with the commercial finite element package COMSOL Multiphysics.Dominant physical effects of the process were taken into account:Thermo-capillary(Marangoni)convection at the upper and lower weld pool surfaces,natural convection due to the gravity influence and the latent heat of solid-liquid phase transition.Simulations were conducted for several magnetic field strengths and it was found that the gravity drop-out associated with welding of thick plates due to the hydrostatic pressure can be prevented by the application of an ac magnetic field below the weld specimen of around 70 mT(rms)at an oscillation frequency of 450 Hz.The inductive support system allows for single-pass laser beam welding of thick aluminum plates.The flow pattern in the molten zone and the temperature distributions are significantly changed by the application of the electromagnetic forces in the weld pool. | BACHMANN Marcel AVILOV Vjaceslav GUMENYUK Andrey RETHMEIER Michael | 2012 | Journal of Iron and Steel Research(International)2012，19，S1： | 0 |
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